Onset

HOBO Water Temperature Pro v2 Data Logger

$ 159.00 USD

The HOBO Water Temp Pro v2 is durable with 12-bit resolution. Complete with a precision sensor for ±0.2°C accuracy, this logger measures temperatures between -40°C and 70°C (-40°F to 158°F) in air and up to 50°C (122°F) in water. Its waterproof, streamlined case allows for extended deployment in fresh or salt water. Moreover, the Water Temp Pro v2’s optical USB interface makes it possible to offload data even while the logger is wet or underwater. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).

Highlighted Features

• Research-grade measurements at an affordable price.
• Waterproof to 120 meters (400 feet).
• Data readout in less than 30 seconds via fast Optic USB interface.
• Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis.

In what environment does this data logger operate?

This data logger operates in outdoor and underwater environments.

What measurements does this data logger support?

The U22-001 data logger supports the following measurements: Temperature and Water Temperature.

• Specifications
• In the Box
• Required Items
• Optional Items
• Manuals

• The country of origin for this product is the United States. To see the full specifications for this product, please see the product manual found at right.
  
  
  • Operation range†: -40° to 70°C (-40° to 158°F) in air; maximum sustained temperature of 50°C (122°F) in water.
  • Accuracy: ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F).
  • Resolution: 0.02°C at 25°C (0.04°F at 77°F).
  • Response time: (90%) 5 minutes in water; 12 minutes in air moving 2 m/sec (typical).
  • Stability (drift): 0.1°C (0.18°F) per year.
  • Real-time clock: ± 1 minute per month 0° to 50°C (32° to 122°F).
  • Battery: 2/3 AA, 3.6 Volt Lithium, factory-replaceable ONLY.
  • Battery life (typical use): 6 years with 1 minute or greater logging interval.
  • Memory (non-volatile): 64K bytes memory (approx. 42,000 12-bit temperature measurements).
  • Weight: 42 g (1.5 oz).
  • Dimensions: 3.0 cm (1.19 in.) maximum diameter, 11.4 cm (4.5 in.).
  • length; mounting hole 6.3 mm (0.25 inches) diameter.
  • Wetted materials: Polypropylene case, EPDM® o-rings, stainless steel retaining ring.
  • Buoyancy (fresh water): +13 g (0.5 oz.) in fresh water at 25°C (77°F); +17 g (0.6 oz.) with optional boot.
  • Waterproof: To 120 m (400 ft.).
  • Shock/drop: 1.5 m (5 ft.) drop at 0°C to 70°C (32°F to 150°F).
  • Logging interval: Fixed-rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations; logging intervals from 1 second to 18 hours. Refer to HOBOware software manual.
  • Launch modes: Immediate start and delayed start.
  • Offload modes: Offload while logging; stop and offload.
  • Battery indication: Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile.
  • NIST certificate available: for additional charge.
  • Environmental Rating: IP68.
  
  The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
  
  †IMPORTANT: The plastic case will become brittle at temperatures lower than -20°C. If the logger is deployed in a location where the temperature drops below -20°C, make sure the logger remains stationary and is not pulled on or struck. Return the logger to above -20°C before handling.
• • Data logger (1)
  • Communications window protective cap (1)
• • HOBOware Pro Software
  • Data Offload Device
• • None
• • Datasheet
  • User's Manual

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HOBO MX800 Series Water Data Loggers ²⁶

$ 520.00 USD

Bluetooth Multiparameter Data Logger

Highly Versatile, Modular Wireless Multiparameter Loggers That Integrate Sensors (Purchased Separately) for Measuring Water Conductivity/Salinity, Depth, Temperature (CT/CTD), and Dissolved Oxygen.

HOBO MX800 Series multiparameter wireless data loggers work with interchangeable sensors to provide a highly configurable solution for monitoring water conductivity/salinity, temperature, depth, and dissolved oxygen. Available in both an easy-to-deploy, fully submersible model (MX801) and a direct read model (MX802) for convenient data offload that doesn’t require having to remove sensors from the water.

Key Features

• Compatible with interchangeable Conductivity, CTD (conductivity/temperature/depth), and DO sensors (sold separately) - swap out sensors for different applications
• Bluetooth, for easy logger configuration and data offload
• Easy to deploy, fully submersible (MX801)
• Direct read for convenient data offload (MX802)
• Logger diameter is less than 2 inches
• Faster data offload via Bluetooth 5.0
• Water detect feature indicates when logger was out of the water (MX801)
• Barometric pressure sensor included (MX802)
• Connect two sensors to one logger to get measurements like salinity adjusted DO directly, with no need for post-processing
• Guided calibration ensures accurate data
• User-replaceable batteries

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Specification	MX801	MX802
  Operating Range	-40° to 50°C (-40° to 122°F), cannot be frozen in ice	-40° to 50°C (-40° to 122°F), cannot be frozen in ice
  Transmission Range	Approximately 30.5 m (100 ft) line-of-sight	Approximately 30.5 m (100 ft) line-of-sight
  Wireless Data Standard	Bluetooth 5
  Maximum Cable Length	N/A	120m (400 ft)
  Logging Rate	5 second to 18 hours
  Water Detect	Events are logged when logger is submerged or removed from the water	N/A
  Time Accuracy	±1 minute per month 0° to 50°C (32° to 122°F)
  Barometric Pressure (Measurement & Calibrated Range)	N/A	66 to 107 kPa (9.6 to 15.5 psia), -20° to 50°C (-4° to 122°F)
  Barometric Pressure (Accuracy)	N/A	Typical error: ±0.2 kPa (0.029 psi); Maximum error: ±0.5 kPa (0.073 psi)
  Barometric Pressure (Resolution)	N/A	<0.01 kPa (0.0015 psi)
  Battery	Four AA, 1.5 V lithium batteries, user replaceable
  Battery Life	With W-CTD or W-CT sensors: 2 years, typical with 1-minute logging interval or slower. With W-DO sensor: 1 year, typical with 5-minute logging interval or slower.
  Memory	730,000 measurements, divided between channels (4 Mbyte memory)
  Materials	Outer enclosure: Polycarbonate/PBT blend with brass inserts; Interior: Polycarbonate/PBT; Gasket: Silicone foam. Cable channel: Santoprene™ TPE.
  Dimensions	Logger diameter: 4.14 cm (1.63 inches) Length without sensor: 20 cm (8 inches)
  Weight	213g (7.51 oz)	215g (7.58 oz)
  Environmental Rating	IP68; waterproof to 100m (with sensor(s) attached)	IP67, NEMA 6; Weatherproof (with cable or Termination Plug attached); not waterproof
  CE & UKCA Compliant	Yes

   

  Specification	Details MX801 AND MX802
  Operating Range	-40° to 50°C (-40° to 122°F), cannot be frozen in ice
  Radio Power	1 mW (0 dBm)
  Transmission Range	Approximately 30.5 m (100 ft) line-of-sight
  Wireless Data Standard	Bluetooth 5
  Number of Sensors That Can Be Connected	2
  Maximum Cable Length	120m (400 ft)
  Logging Rate	5 seconds to 18 hours
  Logging Modes	Fixed interval (normal or statistics), burst, or multiple intervals with up to 8 user-defined logging intervals and durations, with pause and repeat options
  Start Modes	Immediate, next interval, or date & time
  Stop Modes	Memory full, never stop (overwrite oldest data), date & time, or after a set logging period
  Water Detect	Events are logged when logger is submerged or removed from the water (MX801 only)
  Time Accuracy	±1 minute per month 0° to 50°C (32° to 122°F)
  Battery	Four AA, 1.5 V lithium batteries, user replaceable
  Battery Life	With W-CTD or W-CT sensors: 2 years (typical with 1-minute logging interval or slower) With W-DO sensor: 1 year (typical with 5-minute logging interval or slower) Faster logging, burst mode, or excessive readouts will impact battery life
  Memory	730,000 measurements (4 Mbyte memory), divided between channels
  Data Download Time (with Bluetooth 5+ devices)	Full memory: Approximately 3.5 minutes 120,000 measurements: 1 minute May take longer if the device is farther from the logger

   

  Specification	Details Barometric Pressure (MX802 only)
  Barometric Pressure (MX802 Only)	-
  Measurement & Calibrated Range	66 to 107 kPa (9.6 to 15.5 psia), -20° to 50°C (-4° to 122°F)
  Accuracy*	Typical error: ±0.2 kPa (0.029 psi) Maximum error: ±0.5 kPa (0.073 psi)
  Resolution	<0.01 kPa (0.0015 psi)
  Pressure Response Time**	<1 second to 90% at a stable temperature
  Contribution to Water Level Accuracy***	Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water

   

  Specification	Details MX801 and MX802 Specs, continued:
  Dimensions	-
  Logger Diameter	4.14 cm (1.63 inches)
  Length Without Sensor	20 cm (8 inches)
  Length with W-CTD Sensor	36 cm (14 inches)
  Length with W-CT Sensor	33 cm (13 inches)
  Mounting Loop	12.7 x 22.6 mm (0.5 x 0.89 inches)
  Weight	-
  MX801 Logger Head Only	224 g (7.90 oz)
  MX802 Logger Head Only	226 g (7.97 oz)
  Wetted Materials	Logger: PVC housing with polyester film label, PET sensor connector end cap and mounting handle with EPDM and Buna-N O-rings, passivated 316 stainless steel hardware rated for use in saltwater; MX802 also has ePTFE vent Collar: HDPE, titanium screws Note: Logger should be mounted so that no metal parts of the logger are in contact with other metals
  Depth/Environmental Rating	-
  MX801	IP68; waterproof to 100m (with sensor(s) attached)
  MX802	IP67, NEMA 6; Weatherproof (with cable or Termination Plug attached); this model is not waterproof

• • HOBO MX801 o MX802 Data Logger
  • Acoplador
  • Llave Allen de 3/32”
• • HOBO MX800 Series Water Level / CTD / CT Sensors (At least one sensor is required for operation)
  • HOBO Dissolved Oxygen Sensor
• • Sensors
  • Accesories
  • Well Caps
  • Protective Enclosures
  • Communication Cables
• • MX800 Data Sheet
  • Quick Start Guide: MX801 Wireless Submersible Data Logger
  • Quick Start Guide: MX 802 Direct Read Data Logger
  • MX800 Series User Guide

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Onset HOBO Solar Radiation Protectors

$ 125.00 USD

Onset HOBO Solar Radiation Protectors

Versatile mounting solutions for secure installation of HOBO data loggers

The HOBO RS1 mounting brackets (Unassembled) and M-RSA (Pre-assembled) are designed to provide secure and reliable installation of your HOBO data loggers in various applications. The RS1 bracket allows for easy mounting on flat or irregular surfaces, while the M-RSA is optimized for installation on masts, providing stability even in demanding environments. Additionally, the HOBO RS3-B solar radiation shield is designed to enhance the accuracy of temperature and relative humidity measurements in areas exposed to direct or reflected solar radiation. It is compatible with tripods, masts, or flat surfaces.

The shield is recommended for accuracy in measuring temperature and relative humidity in areas directly exposed to or reflected by solar radiation. It can be mounted on tripods, masts, or flat vertical surfaces. It is ideal for use with data loggers such as HOBO Pendant and U-Series data loggers.

Note: Please note that if you are using a U-23 data logger, it may be necessary to purchase the U-23 Clamp Kit.

Features:

• RS1: Versatile support for mounting on flat or irregular surfaces
• M-RSA: Specialized support for installation on masts or poles
• RS3-B: Solar shield for data loggers, improves temperature and humidity accuracy
• Durable, weather-resistant material
• Easy to install with included accessories
• Compatible with a wide range of HOBO data loggers

• Specifications
• In the Box
• Documents

• RS1
  Height	152 mm (6.0 inches); 165 mm (6.5 inches) with bracket
  Width	210 mm (8.3 inches)
  Depth	187 mm (7.4 inches); bracket protrudes an additional 44 mm (1.8 inches) from shield
  Mounting	Includes 1.5" U-bolts for mounting on masts, or mount on a flat surface with user-supplied screws

  
  

  M-RSA
  Height	152 mm (6.0 inches); 165 mm (6.5 inches) with bracket
  Width	210 mm (8.3 inches)
  Depth	187 mm (7.4 inches); bracket protrudes an additional 44 mm (1.8 inches) from shield
  Mounting	Includes 1-5/8" U-bolts for mounting on masts, or mount on a flat surface with user-supplied screws

  
  

  RS3-B
  Height	280 mm (11.0 inches)
  Width	220 mm (8.7 inches)
  Depth	190 mm (7.5 inches)
  Weight	0.68 kg
  Mounting	Compatible with 1.25" to 2.1" masts or flat surfaces

• • Installation accessories
  • User manual
• • User manual for RS1 reference (English)
  • User manual for M-RSA reference (English)
  • User manual for RS3-B reference (English)

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HOBO Dissolved Oxygen Sensor ²⁶

$ 1,403.00 USD

View full product details »

Onset HOBO MX2201 Pendant Wireless Temperature Data Logger ²⁶

$ 85.00 USD

HOBO Pendant MX Water Temperature Data Logger con Conectividad Bluetooth

Registra temperatura con precisión en agua, suelo y ambientes naturales con acceso inalámbrico directo desde tu dispositivo móvil o computadora. Un registrador compacto, resistente y diseñado para monitoreo ambiental confiable en campo.

El HOBO Pendant MX Water Temperature Data Logger es un registrador de temperatura impermeable diseñado para mediciones precisas en ambientes naturales como ríos, lagos, océanos y suelos. Gracias a su conectividad Bluetooth, permite configurar el dispositivo y descargar los datos de forma inalámbrica directamente desde un dispositivo móvil o una computadora con la aplicación gratuita HOBOconnect.

Este registrador compacto y robusto está diseñado para soportar condiciones ambientales exigentes. Su carcasa impermeable permite su uso en entornos acuáticos hasta 30 metros de profundidad, lo que lo convierte en una herramienta ideal para investigaciones ambientales, monitoreo hidrológico y estudios de campo.

El dispositivo puede almacenar hasta 96.000 mediciones de temperatura, lo que facilita la recopilación de datos a largo plazo. Además, los usuarios pueden ampliar las capacidades de gestión de datos mediante los planes MX Data Plan para integrarlo con la plataforma de software LI-COR Cloud y acceder a herramientas avanzadas de monitoreo remoto.

Características Destacadas

• Configuración y descarga inalámbrica mediante tecnología Bluetooth.
• Memoria interna capaz de almacenar hasta 96000 mediciones.
• Carcasa impermeable diseñada para operar hasta 30 metros de profundidad.
• Batería reemplazable por el usuario para mayor vida útil.
• Diseño compacto y resistente ideal para monitoreo ambiental.
• Pestañas de montaje integradas para instalación rápida.
• Indicador LED que alerta cuando la temperatura supera el umbral configurado.
• Compatible con la aplicación gratuita HOBOconnect.
• Precisión de medición de ±0.5 °C.

• Especificaciones
• En la Caja
• Artículos Opcionales
• Documentos

• Tipo de Dispositivo	Registrador de Temperatura con Bluetooth
  Aplicación	Monitoreo de Temperatura en Agua, Aire y Suelo
  Rango de Temperatura en Aire	-20 a 70 °C (-4 a 158 °F)
  Rango de Temperatura en Agua	-20 a 50 °C (-4 a 122 °F)
  Precisión	±0.5 °C
  Resolución	0.04 °C
  Deriva	<0.1 °C por Año
  Tiempo de Respuesta en Aire	17 Minutos Típicos al 90 % en Aire en Movimiento de 1 m/s
  Tiempo de Respuesta en Agua	7 Minutos Típicos al 90 % en Agua Agitada
  Memoria	96000 Mediciones
  Conectividad	Bluetooth
  Profundidad Máxima	30 m (100 ft)
  Batería	Reemplazable por el Usuario
  Compatibilidad de Software	Aplicación HOBOconnect para Dispositivos Móviles y Windows

• • 1x Registrador de Temperatura HOBO Pendant MX.
  • 1x Soporte de Montaje HOBO Pendant Mounting Boot.
• • MX Gateway MXGTW1.
  • Boot de Montaje Adicional BOOT-MX2201-2202.
  • Kit de Certificación de Temperatura NIST.
  • O-Ring de Reemplazo MX2201-02-ORING (Paquete de 5).
  • Plan Anual LI-COR Cloud MX-Speed.
  • Plan Anual LI-COR Cloud MX-Data.
  • Mochila HOBO North Face Groundwork ME-BP.
• • Manual de Usuario (Inglés).
  • Documentación de Certificación NIST Opcional.

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Onset HOBO Optic USB Base Station

$ 179.25 USD

Universal Optic USB Base Station: The Ultimate Control Center for Your HOBO® Data Loggers

Download data ultra-fast (64K in 30 seconds) from any HOBO® data logger with a USB optic interface. Durable base station with included couplers for maximum compatibility with UA, U20, U22, U23, UTBI, U24, and U26 series.

The Universal Optic USB base station and couplers are used to download data from any HOBO® data logger with a USB optic interface. The splash-resistant USB optic base station connects to your computer via USB while connecting to the data logger through the appropriate coupler. This is compatible with HOBO UA, U20, U22, U23, UTBI, U24, and U26 series. (Download user manual).

NOTE: Couplers for all compatible data loggers are included with the BASE-U-4. The couplers are included for compatibility with six of Onset’s most popular data logger types, including: UA Pendants, U20 water level data loggers, U22 Water Temp Pro v2, UTBI TidbiT, U24 Conductivity, and U23 data loggers.

Key Features

• Download data from any HOBO® data logger with a USB optic interface.
• Couplers included.
• Cable length 183 cm.
• Download a full 64K logger in 30 seconds.

• Specifications
• In the Box
• Required Items
• Optional Items
• Manuals

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HOBO U23 Pro v2 Data Loggers - Discontinued

$ 170.00 USD

The HOBO U23 Pro v2 data loggers are weatherproof with different options depend on the user necessity.

The HOBO Pro v2 Temperature/Relative Humidity data logger U23-001 is a data logger with built-in temperature and relative humidity sensors. The Relative Humidity sensor provides superior durability in humid environments and is user replaceable.

The HOBO Pro v2 External Temperature/Relative Humidity Data Logger U23-002 is a data logger with an external Temperature and Relative Humidity sensor on a 6-foot cable for fast sensor response and deployment in tight spaces. The Relative Humidity sensor features fast response and superior durability in humid environments, and is user-replaceable.

The HOBO Pro v2 2x External Temperature Data Logger U23-003 is a data logger with two external soil/water temperature probes on 6-foot cables for fast sensor response and deployment in tight spaces.

The HOBO Pro v2 Temperature/External Temperature data logger is a data logger with an external soil/water temperature sensor on a 6-foot cable useful for situations where just one temperature probe is required. An internal temperature sensor is also included.

IMPORTANT: HOBO data loggers require HOBOware software (USB interface cable included w/CD purchase). See compatible items below and connection HOBO Optic USB Base Station interface above right.

• Specifications
• In the Box
• Required Items
• Optional Items

• Temperature Sensor 
  Operation range Internal sensors: -40° to 70°C (-40° to 158°F) U23-002 external temperature sensor: -40° to 70°C (-40° to 158°F) U23-003 and U23-004 external sensors: -40° to 100°C (-40° to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year.
  
  Accuracy:
  ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F); see Plot A.
  
  Resolution:
  0.02°C at 25°C (0.04°F at 77°F); see Plot A Response time (typical to 90%) U23-001 Internal sensor: 40 minutes in air moving 1 m/sec U23-002 external temperature sensor: 5 minutes in air moving 1 m/sec U23-003 and U23-004 external sensors: 3 minutes in air moving 1 m/sec; 30 seconds in stirred water Stability (drift): < 0.1°C (0.18°F) per year. 
  
  Relative Humidity Sensor (U23-001, U23-002 only) 
  Operation range 0-100% RH, -40° to 70°C (-40° to 158°F) Exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%.
  
  Accuracy:
  ±2.5% from 10% to 90% RH (typical), to a maximum of ±3.5% including hysteresis. See Plot B for full range.
  
  Resolution:
  0.03% Response time (typical to 90%) U23-001: 40 minute in air moving 1 m/sec with protective cap U23-002: 5 minutes in air moving 1 m/sec with protective cap Stability (drift) < 1% per year typical. 
  
  Logger 
  Operation range -40° to 70°C (-40° to 158°F) Real-time clock ± 1 minute per month 0° to 50°C (32° to 122°F) Battery 1/2 AA, 3.6 Volt lithium, user-replaceable (part # HP-B) Battery life (typical use): 3 years with 1 minute or greater logging interval Memory (non-volatile): 64K bytes memory (approx. 21,000 temperature and RH measurements).
  
  Materials all models:
  ASA styrene polymer housing and mounting clamp; polypropylene protective cap; Buna-N o-ring(s) U23-001, U23-002 only: ASA styrene polymer RH sensor cap; modified hydrophobic polyethersulfone membrane.
  
  Cables:
  U23-001: No cables.
  U23-002: One 184 cm (6 ft) PVC cable; sensor diameter 1 cm (0.38 in).
  U23-003: Two 184 cm (6 ft) PVC cables; sensor diameter 0.5 cm (0.20 in).
  U23-004: One 184 cm (6 ft) PVC cable; sensor diameter 0.5 cm (0.20 in).
  
  Environmental rating:
  Electronics housing is NEMA 6P equivalent (tolerant of brief submergence). Units with RH sensors are NEMA 4 equivalent (splash-resistant).
  
  Launch modes:
  Immediate start; delayed start.
  
  Logging interval:
  Fixed-rate or multiple logging intervals, with up to 8 user-defined logging intervals and durations; logging intervals from 1 second to 18 hours (refer to HOBOware software manual).
  
  Offload modes:
  Offload while logging; stop and offload.
  
  Battery indication:
  Battery voltage can be viewed in status screen and optionally logged in datafile. Low battery indication in datafile. 
  
  Weight:
  U23-001: 57 g (1.5 oz).
  U23-002: 118 g (3.1 oz).
  U23-003: 138 g (3.7 oz).
  U23-004: 102 g (2.7 oz).
  
  Dimensions:
  Housing measures 10.2 × 3.8 cm (4.0 × 1.5 in.). NIST certificate Temperature available for additional charge. The CE Marking identifies this product as complying with the relevant directives in the European Union (EU).
• - Manual
• - HOBOware Pro Mac/Win Data Logger Software
  - Optic USB Base Station
• None

Data Logger HOBO Pro v2 U23

EO20232103

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HOBO MX2308 Temperature/RH & PAR Data Logger ²⁶

$ 255.00 USD

Record Environmental Conditions with Scientific Precision: HOBO MX2308 Temp/RH/PAR Data Logger

Monitor temperature, humidity, and photosynthetically active radiation (PAR) with high accuracy and wireless Bluetooth download

The HOBO MX2308 Temp/RH/PAR Data Logger provides research-grade environmental monitoring for temperature, relative humidity, and photosynthetically active radiation (PAR), all in one device. Designed to be rugged and easy to use, this wireless logger is ideal for commercial greenhouses, hydroponic crops, vertical farms, and ecological research. Its integration with the LI-COR LI-190R sensor ensures accurate and reliable measurements, while Bluetooth connectivity enables fast, cable-free data downloads—even in hard-to-reach locations.

Key Features:

• Monitoring of Three Key Parameters: Temperature, relative humidity, and PAR in one compact device.
• Compatible with LI-COR LI-190R Sensor: Industry standard for accurate photosynthetically active radiation measurements.
• Bluetooth Data Download: No cables or additional devices required; up to 30 m (100 ft) range.
• Durable Design: NEMA 6/IP67-rated sealed enclosure for outdoor use.
• Free HOBOconnect Software: Mobile or desktop app for configuration and data download.
• Ideal for Agriculture and Research: From crop optimization to academic studies.
• Memory for 195,000 Measurements: Large capacity for extended monitoring campaigns.
• Flexible Installation: Compatible with radiation shields, mounting brackets, and leveling accessories.

• Specifications
• In the Box
• Optional Items
• Documents

• Specification	HOBO MX2308
  Measured Parameters	Temperature, Relative Humidity, PAR (with LI-COR LI-190R sensor)
  Temperature Range	-40 to 65 °C (-40 to 149 °F)
  Temperature Accuracy	±0.2 °C (typical)
  Humidity Range	0 to 100% RH
  Humidity Accuracy	±2.5% from 10% to 90% RH
  PAR Range	0 to 3,000 μmol/m²/s
  PAR Resolution	0.1 μmol/m²/s
  Memory	195,000 measurements
  Logging Interval	1 second to 18 hours
  Connectivity	Bluetooth Low Energy (BLE)
  Transmission Range	Up to 30.5 m (100 ft)
  Battery	2/3 AA 3.6 V lithium, replaceable
  Battery Life	Up to 5 years (depending on use)
  Environmental Rating	NEMA 6, IP67

• • HOBO MX2308 Data Logger
  • Mounting screws
  • Plastic zip ties
• • Solar radiation shield (RS1 or M-RSA)
  • Shield mounting bracket (MX2300-RSBRACKET)
  • Sensor leveling accessory (2003S)
  • Replacement battery (HRB-2/3AA)
• • HOBO User Manual (English )

View full product details »

Onset RX3000 Remote Monitoring Station for Indoor Environments with Real-Time Access

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Total Environmental Control: HOBO RX3000 Station with Remote Access and Smart Sensors

Real-time remote access to site-specific indoor environmental data.

The RX3000 is HOBO’s most flexible remote data logging station, ideal for monitoring indoor conditions with remote access via the Internet. Its modular design allows for custom configurations using smart sensors and optional modules, all operating with a plug-and-play system and local viewing via an integrated LCD screen. It is a professional solution backed by the HOBOlink cloud platform, which requires an annually renewable RX data plan.

Features

• Compatible with a wide range of smart sensors
• Built-in LCD screen for viewing data and system status
• Remote access via HOBOlink (requires RX data plan)
• Alarm notifications via email or SMS
• Automatic data delivery scheduling
• Configurable via web browser or mobile device
• Optional modules: analog input, relay, water level sensor
• Simple plug-and-play operation

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Operating Range	-40°C to 60°C (-40°F to 140°F)
  Smart Sensor Connectors	10
  Maximum Sensor Cable Length	100 m (328 ft)
  Smart Sensor Channels	Up to 15
  Module Slots	2
  Logging Rate	1 second to 18 hours (model depends on RX variant)
  Time Accuracy	±8 seconds/month (0–40°C), ±30 seconds/month (-40–60°C)
  Power Supply	4V 10AHr sealed lead-acid rechargeable battery (requires external power: AC, solar, or 5–17V DC)
  Battery Life	Typically 3–5 years (-20°C to 40°C)
  Memory	32 MB, up to 2 million measurements
  Alarm Notification Latency	Logging interval + 2–4 minutes
  LCD Screen	Visible from 0°C to 50°C (may react slowly or go blank outside this range)
  Enclosure Material	Polycarbonate/PBT, silicone gaskets, brass inserts, EPDM cable channel
  Mounting	Mounts on 1.5 in (3.8 cm) mast or wall
  Environmental Rating	NEMA 4X weather-resistant
  FCC/IC Compliance	RX3002: FCC R68XPICOW / IC 3867A-XPICOW RX3003: FCC QIPEHS6 / IC 7830A-EHS6 RX3004: FCC QIPPLS62-W / IC 7830A-PLS62W
  Wireless Radio	RX3003: GSM/UMTS; RX3004: GSM/UMTS/LTE (multi-band)
  Antenna	RX3003: Penta band RX3004: 4G LTE

• • RX3000 Monitoring Station (1)
  • Integrated rechargeable battery (1)
  • User manual (1)
• • Active RX data plan (sold separately)
  • External power supply (AC-U30, SOLAR-xW panel, or 5–17V DC source with CABLE-RX-PWR)
• • Analog input module
  • Relay module
  • Water level sensor module
  • Compatible smart sensors (temperature, humidity, CO₂, etc.)
• • User Manual (English)
  • Developer Guide (English)

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HOBO Anti-Biofouling Guard for MX800 Adapter Guard

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This copper guard prevents biofouling of sensors that are attached to MX800 Series Bluetooth water...

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HOBO 2-Sensor Adapter for MX800 Data Loggers

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2-Sensor Adapter for MX800 Data Loggers

This Adapter Lets You Monitor Multiple Parameters by Connecting Any Two Sensors—DO, CT, and/or CTD—to a Single HOBO MX800 Water Quality Data Logger.

This adapter supports the connection of any two sensors to one MX800 data logger- Dissolved Oxygen (part # W-DO), Conductivity Sensor (part # W-CT), and CTD sensor (part # W-CTD-xx).

Sensors can be attached directly to the fully submersible MX801 model, or to the end of a W-series cable that's connected to the direct-read MX802 model. Two sensors of the same type can be attached to monitor at multiple depths. When using a DO with CT or CTD combination, salinity-adjusted DO readings are logged directly without a need to perform post-processing.

The 2-sensor adapter comes with a sensor guard that screws onto the adapter to prevent damage to sensors while allowing ample water flow. Users also have an option to purchase an additional anti-biofouling guard (W-GUARD-2), which extends time between sensor cleanings by reducing fouling of the sensor.

Key Features

• Can connect sensors directly (MX801), or cables to sensors (MX802).
• Protective housing screws on and off for easy access to sensors

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Dimensions
  Full Length	12.3"
  Full Length with W-GUARD-2 Anti-Fouling Guard	12.5"
  Diameter	2.385"
  Diameter with W-GUARD-2 Copper Anti-Fouling Guard	2.5"

• • 2-Sensor Adapter
  • 2 sets of couplers for attaching the two sensors
  • Sensor bracket for holding sensors together
  • Sensor guard
  • Set screws to lock sensor guard into adapter
  • Tapered coupler for attaching adapter to a W-Series direct read cable
• • MX800 Data Loggers
• • Anti-Biofouling Guard for MX800 Adapter Guard: W-GUARD-2
  • Dissolved Oxygen Sensor: W-DO
  • Conductivity Sensor: W-CT
  • CTD Sensor, 9 Meter (30') Range: W-CTD-01
  • CTD Sensor, 30 Meter (100') Range: W-CTD-02
  • CTD Sensor, 76 Meter (250') Range: W-CTD-03
  • CTD Sensor, 4 Meter (13') Range: W-CTD-04
• • User Guide (EN)

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HOBO ONSET CTD Sensor

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Onset CTD Sensor for MX800 Series

A Conductivity/Temperature/Depth sensor for use with HOBO MX800 Series Water Loggers with sensor options available for 4 mt, 9 mt, 30.6 mt or 76.5 mt (13, 30, 100 or 250 ft) in a wide range of underwater environments; for use in freshwater or saltwater.

The CTD sensor is an interchangeable sensor that works with HOBO MX800 Series Water Loggers to measure conductivity, temperature, and water level. With this sensor attached to a HOBO MX800 Series Water Logger, the logger can also calculate specific conductance, salinity, and total dissolved solids (TDS). The CTD sensor can be attached directly to the fully submersible MX801 model, or attached via cable to the direct read MX802 model, which doesn’t require having to pull the sensor out of the water to download data.

Key Features

• 4-electrode conductivity sensor provides wide measurement range for monitoring freshwater or saltwater
• Conductivity sensor is centrally located to minimize effects from stilling wells or protective guards
• Durable ceramic water level sensor, located in the sensor tip for accurate measurement of shallow water levels
• Get water level directly with the MX802, no need for post-processing
• 2.5 cm (1 in) diameter for use in narrow wells (with cable to MX802 above the well)
• Temperature sensor placement near the sensor tip for fast response time
• Specially treated stainless steel holds up in saltwater

• Specifications
• In the Box
• Required Items
• Optional Items

• Variable	Measurement Type	Related SKU	Measurement Units	Notes
  Electrical Conductivity	Direct Measurement	All (W-CTD-01 to 04)	µS/cm	Measures the water's ability to conduct an electrical current.
  Specific Conductance	Calculated	All (W-CTD-01 to 04)	µS/cm	Conductivity automatically compensated for temperature.
  Salinity	Calculated	All (W-CTD-01 to 04)	PSU	Calculated based on the PSS-78 standard.
  Total Dissolved Solids (TDS)	Calculated	All (W-CTD-01 to 04)	mg/L	Concentration of dissolved mineral substances in the water.
  Temperature	Direct Measurement	All (W-CTD-01 to 04)	°C	Range from -20° to 50°C. Essential for automatic compensations.
  Absolute / Raw Pressure	Direct Measurement	All (W-CTD-01 to 04)	kPa / psia	Total pressure detected by the ceramic sensor element.
  Water Level / Depth (Short Range)	Calculated / Direct	W-CTD-04	0 to 4 mt (0 to 13 ft)	Ideal for very shallow waters. Maximum error of 0.6 cm (0.02 ft).
  Water Level / Depth (Standard Range)	Calculated / Direct	W-CTD-01	0 to 9 mt (0 to 30 ft)	Standard setup for wells or streams. Maximum error of 1.0 cm (0.03 ft).
  Water Level / Depth (Medium Range)	Calculated / Direct	W-CTD-02	0 to 30.6 mt (0 to 100 ft)	For intermediate depth applications. Maximum error of 3.0 cm (0.1 ft).
  Water Level / Depth (High Range)	Calculated / Direct	W-CTD-03	0 to 76.5 mt (0 to 251 ft)	Designed for deep wells. Maximum error of 7.6 cm (0.25 ft).
  Sensor Diameter	Physical Dimension	All (W-CTD-01 to 04)	2.5 cm (0.08 ft)	Sized specifically for deployment in narrow wells (1 inch).
  Sensor Length	Physical Dimension	All (W-CTD-01 to 04)	18.7 cm (0.61 ft)	Total length of the cylindrical sensor body (7.37 inches).

   

  Conductivity Measurements
  Measurement Range	Electrical conductivity and specific conductance: 0 to 100,000 µS/cm Salinity using PSS-78: 2 to 42 PSU Total Dissolved Solids (TDS): 0 to 100,000 mg/L
  Calibrated Range	Electrical conductivity: 50 to 80,000 µS/cm 5° to 35°C (41° to 95°F)
  Accuracy	Conductivity: ±2% or 15 µS/cm Salinity: ±2% of reading or 0.1 PSU
  Temperature Measurements
  Range	-20° to 50°C (-40° to 122°F)
  Accuracy	±0.15°C (±0.27°F)
  Resolution	0.01°C at 25°C
  Sensor Physical Specifications
  Dimensions	2.5 cm diameter, 18.7 cm length
  Weight	177 g (0.39 lb / 6.24 oz)
  Environmental Rating	IP68

  Water Level Measurements W-CTD-01
  Range	0 to 207 kPa (0 to 30 psia)
  Accuracy	Typical error: ±0.05% FS
  Resolution	<0.02 kPa (0.003 psi)
  Water Level Measurements W-CTD-04
  Range	0 to 145 kPa (0 to 21 psia)
  Accuracy	Typical error: ±0.075% FS
  Resolution	<0.014 kPa (0.002 psi)

• • 1x CTD Sensor
• • Data Logger MX800 Series
• • Antifouling Protective Guard
  • Accessories
  • Communication Cables

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HOBO® UX120 Four-Channel Analog Data Logger

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HOBO® UX120 Four-Channel Analog Data Logger

The HOBO Analog Data Logger is a high-performance data logger with an LCD display, ideal for creating performance monitoring applications.

It offers twice the accuracy of previous models, an easy-to-use LCD display, and flexible support for up to four external sensors to measure temperature, current, CO2, voltage, and more.

The data logger is ideal for energy audits, building commissioning studies, equipment programming, and more.

Key Features:

• Twice the accuracy of previous models with a 16-bit resolution.
• Flexible support for a wide range of external sensors.
• The LCD screen confirms the logger's operation and displays measurement data almost in real time.
• Offers minimum, maximum, average, and standard deviation recording options.
• On-screen alarms notify when a sensor reading exceeds set limits.
• Stores 1.9 million measurements for longer deployments between downloads.
• Compatible with HOBOware and HOBOware Pro software for logger configuration, graphing, and analysis.

What environment does this data logger operate in?

The data logger operates in indoor environments.

What measurements does this data logger support?

The data logger supports the following measurements: 4-20 mA, AC current, AC voltage, air speed, carbon dioxide, compressed air flow, DC current, DC voltage, differential pressure, gauge pressure, kilowatts (kW), temperature, and Volatile Organic Compounds.

• Specifications
• Package Contents
• Required Items
• Optional Items

• Features	Logger with Cable
  Operating Range	4-20mA (with CABO-4-20MA) 0 to 20.1 mA 0 to 2.5 V (with CABO-2.5-STEREO) 0 to 5 V (with CABO-ADAP5) 0 to 10 V (with CABO-ADAP10) 0 to 24 V (with CABO-ADAP24)
  Accuracy	4-20 mA ± 0.001 mA ± 0.2% of reading (with CABO-4-20MA) ± 0.1 mV ± 0.1% of reading (with CABO-2.5-STEREO) ± 0.2 mV ± 0.3% of reading (with CABO-ADAP5) ± 0.4 mV ± 0.3% of reading (with CABO-ADAP10) ± 1.0 mV ± 0.3% of reading (with CABO-ADAP24)
  Resolution	0.3 µA 4-20mA (with CABO-4-20MA) 40 µV (with CABO-2.5-STEREO) 80 µV (with CABO-ADAP5) 160 µV (with CABO-ADAP10) 384 µV (with CABO-ADAP24)
  Stability (Drift)	<0.1 °C (0.18 °F) per year
  Features	Logger
  Operating Range	-20 °C to 70 °C (-4 °F to 158 °F); 0 to 95% RH (non-condensing)
  Reading	0 °C to 50 °C (32 °F to 122 °F) per USB specification
  Recording Interval	1 second to 18 hours, 12 minutes, 15 seconds
  Recording Mode	Normal, burst, or statistics
  Start Mode	Immediate, button, date and time
  Time Accuracy	± 1 minute per month at 25 °C (77 °F)
  Battery	Two AAA 1.5V alkaline batteries
  Memory	4 MB (1.9 million measurements maximum)
  Download Type	USB 2.0 interface
  LCD	LCD visible from 0 °C to 50 °C (32 °F to 122 °F); the LCD may respond slowly or go blank at temperatures outside this range
  Dimensions	10.8 x 5.41 x 2.54 cm
  Weight	107.5 g
  Environmental Rating	IP50
  	The CE mark identifies this product as complying with all relevant directives in the European Union (EU).

• • HOBO® UX120 Four-Channel Analog Data Logger (1)
  • Double-Sided Tape (1)
  • Hook and Loop Strap (1)
  • AAA 1.5V Alkaline Batteries (2)
  • Command™ Strips (1)
• Software
  
  • HOBOware Pro Software CD or USB Flash Drive (USB cable included)
  • HOBOware Pro Software - Mac/Win (Download only)
• Accessories
  
  • NIST Temperature Point Certification.
  • NIST Traceable Certification Installation Fee.
  • Compliance Certification.
  • Pelican Case.

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Self-Describing 6-foot Stainless Steel Temperature Sensor

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Self-Describing 6-Foot Stainless Steel Temperature Sensor

For use with HOBO MX1104 and MX1105 Multi-Channel Data Loggers, this food-grade stainless steel temperature sensor features integrated strain relief to keep the probe securely connected to the logger. It also includes self-describing technology to automatically communicate configuration information to the logger, eliminating the need for extensive user programming or setup.

Features

• Self-describing technology for quick and easy setup
• Locking connector to ensure the sensor stays connected
• Food-grade stainless steel temperature probe
• Measurement range of -40° to 100°C (-40° to 212°F)
• Accuracy of ±0.15°C from 0° to 70°C (±0.27°F from 32° to 158°F)
• Available in 1.8 m (6 feet) length

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Measurement Range	-40° to 100°C / -40° to 212°F
  Accuracy	±0.15°C from 0° to 50°C (±0.27°F from 32° to 122°F), insert probe at least 5.08 cm (2 inches); see Chart A
  Resolution	0.002° at 25°C / 0.003° at 77°F
  Drift	<0.1°C (<0.2°F) per year
  Response Time in Air	Typical 3 minutes to 90% in air moving at 1 m/s (2.2 mph)
  Response Time in Agitated Water	Typical 15 seconds to 90%
  Probe Diameter	3.2 mm ±0.25 mm / 0.12 inches ±0.01 inches
  Probe Length	10.2 cm / 4 inches
  Probe Housing	Food-grade stainless steel (#316 stainless steel) Note: The stainless steel probe is waterproof, but the cable is not intended for prolonged use in water or humid environments, especially those with temperatures above 30°C (86°F). For more details, contact Onset Computer Corporation or an authorized Onset distributor.
  Cable Length	1.8 m / 6 feet

• • Self-Describing 1.8 Meter Stainless Steel Temperature Sensor
• • None
• • None
• Technical Specifications Manual (English)

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Onset 1.8 m Self-Describing Pipe Temperature Sensor

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What measurements does this sensor support?

The SD-TEMP-P-06 sensor supports the following measurements: Temperature and soil temperature.

In what environment does this sensor operate?

This sensor operates in both indoor and outdoor environments.

Features

• Self-describing technology for quick and easy setup
• Locking connector to ensure the sensor is connected and stays connected
• Measurement range of -40° to 100°C
• Accuracy of ±0.15°C from 0° to 70°C
• Available in 1.8 m length
• Faster response time
• Suitable for pipe mounting

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Measurement Range	-40°C to 75°C
  Temperature Accuracy	±0.15°C from 0° to 50°C, probe must be inserted at least 2.3 cm
  Temperature Resolution	0.002° at 25°C
  Temperature Drift	<0.1°C per year
  Response Time in Air	Typical 2 minutes to 90% in air moving at 1 m/s
  Response Time in Pipe	Typically 2 times faster than the air/water/soil temperature sensor, typically less than 1 minute to 90%
  Probe Housing	Copper-coated sensor tip
  Probe Dimensions	0.9 x 5.8 cm
  Cable Length	1.8 m

• • Onset 1.8 m Self-Describing Pipe Temperature Sensor (1)
• • None
• • None
• Technical Specifications Manual (English)
• Data Sheet

(LC 20220629)

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Onset Temperature Sensor for Air, Water & Soil

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Self-Describing Air/Water/Soil Temperature Sensor

The self-describing temperature sensor for air, water, and soil is ideal for the HOBO MX1104 and MX1105 data loggers, offering automatic and easy configuration.

This temperature sensor is compatible with the HOBO MX1104 and MX1105 multichannel data loggers. It features integrated strain relief to secure the probe to the logger and self-describing technology to automatically communicate configuration information.

Key Features

• Self-Describing Technology: Quick and easy setup.
• Locking Connector: Ensures the sensor stays connected.
• Measurement Range: -40° to 100°C in air; -40° to 50°C in water.
• High Accuracy: ±0.15°C from 0° to 70°C.
• Various Cable Lengths: 0.3 m, 1.8 m, 5.1 m, and 15.2 m.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Specification	Detail
  Measurement Range	-40° to 50°C in water; -40° to 100°C in air
  Accuracy	±0.15°C from 0° to 50°C (±0.27°F from 32° to 122°F)
  Resolution	0.002° at 25°C (0.003° at 77°F)
  Drift	<0.1°C (<0.2°F) per year
  Response Time in Air	Typical 2 minutes to 90% in air moving at 1 m/s (2.2 mph)
  Response Time in Water	Typical 30 seconds to 90%
  Operating Range	Probe tip and cable immersion in fresh water up to 50°C for 1 year
  Probe Material	Copper-coated sensor tip
  Probe Dimensions	5.1 x 33 mm (0.2 x 1.3 inches)
  Available Cable Lengths	0.3 m, 1.8 m, 5.1 m, 15.2 m

• • Air/Water/Soil Temperature Sensor
  • Cable of selected length (0.3 m, 1.8 m, 5.1 m, or 15.2 m)
  • Locking Connector
  • Manual
• • Bluetooth (BLE) Data Loggers
  • HOBO Temp/RH/Light/Ext-Analog Data Logger
  • MX1104
  • HOBO 4-Channel Analog Data Logger
• • Data Logger
• • Technical Specifications (English)

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HOBO Analog Multichannel Data Logger for Temperature, Humidity, and Light

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HOBO Analog Multichannel Data Logger for Temperature, Humidity, and Light

This HOBO analog multichannel data logger measures and wirelessly transmits temperature, relative humidity, and light intensity data. It also includes an external analog input to connect a variety of additional sensors.

You can use your mobile device or Windows computer with Onset's free HOBOconnect app to access the data anytime within a range of up to 30.5 meters (100 feet) via Bluetooth Low Energy (BLE) technology. You can configure the data logger, read data, view graphs, check the operational status of the loggers, set alarm notifications, and share data files, all without the need for dedicated equipment beyond a mobile device or laptop. And, when used with the new MX Gateway, you can remotely access your data on Onset’s cloud-based HOBOlink® software.

• Specifications
• In the Box
• Required Items
• Optional Items

• Specifications
  Transmission Range	Approximately 30.5 m (100 feet) line of sight
  Wireless Data Standard	Bluetooth 5.0 (BLE)
  Connectivity	WiFi 802.11a/b/g/n 2.4/5 GHz or Ethernet 10/100
  Security	WPA and WPA2, non-listed protocols are not supported
  Power Supply	AC Adapter or Power over Ethernet (PoE)
  Dimensions	12.4 x 12.4 x 2.87 cm
  Weight	137 grams (4.83 ounces)
  CE	The CE mark indicates that this product meets all relevant European Union (EU) directives.

• • HOBO Analog Multichannel Data Logger for Temperature, Humidity, and Light (1)
• • HOBOconnect Android App
  • HOBOconnect iPhone App
• • None

(S 2/8/2021)

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Onset HOBO MicroRX Station

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A Rugged, Easy-to-Deploy, Low-Cost Cellular Solution for long-Term, Reliable Field Monitoring

Inputs for up to five plug-and-play sensors. Data access through HOBOlink cloud platform.

Optional ItemsExternal sensors must be purchased separately. Requires a HOBOlink data plan, which must be renewed annually. Learn more about HOBOlink.

A compact, rugged, easy-to-deploy, low-cost cellular solution for long-term, reliable field monitoring. With two power options available (a solar panel for extended deployments or user-replaceable batteries for flexible mounting in covered or protected locations), this monitoring station includes inputs for up to five of Onset's research-grade plug-and-play sensors. (Sensors must be purchased separately.)

Configurable station-side alarms trigger immediate notifications of critical conditions, and Onset's HOBOlink cloud platform makes it easy to view, access, and share data. This station can also be ordered with an additional water level sensor input with integrated flow conversion.

Outstanding Features

• Compact size for easy deployment
• Robust, weatherproof IP66/NEMA 4X enclosure
• Two power options:
• Integrated 1.7 W solar panel with rechargeable battery pack
• 5 W and 15 W external solar panels can be added to MicroRX Station (RX2102), MicroRX Water Level Station (RX2104) or MicroRX Station for HOBOnet (RX2106)
• User-replaceable AA lithium batteries
• Inputs for five plug-and-play sensors
• Option for wireless sensors using HOBOnet (RX2106 only)
• Optional water level sensor input included in MicroRX Water Level Station, battery-powered (RX2103) and MicroRX Water Level Station, solar-powered (RX2104)
• Built-in LCD confirms proper setup and operation
• Integrated mounting tabs for use with screws, zip ties, or U-bolts
• Station-side alarms, including water flow and accumulated rainfall
• Up to 10-minute connection rates via 4G cellular data plans
• Cloud-based monitoring and data access through HOBOlink

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• • Technical specifications (English)
• • HOBO RX2100 MicroRX Station
  • Grease packet
  • Cable ties
  • Screws and washers
  • Batteries
  • Manual
• • HOBOlink Software
  • Sensor
• • Software
  • Sensor
  • Accessory
• • Technical specifications (English)

EO2023803

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Onset HOBO MicroRX Water Level Station

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Award-Winning Cellular, Remote Water Level Monitoring Solution

for dam sites, stormwater, floodwater, irrigation, hydrologic, and environmental applications

Optional Items Product needs level sensor. Requires a HOBOlink data plan, which must be renewed annually. Learn more about HOBOlink. Not compatible with HOBOnet wireless sensors.

An award-winning cellular, remote water level monitoring solution for stormwater, floodwater, irrigation, hydrologic, and environmental applications. Pre-programmed water flow formulas for select weirs, flumes, and a stage discharge table result in an easy and intuitive configuration.

Water flow and accumulated rainfall calculations, which are performed directly on the station at time of measurement, trigger immediate notifications of critical water level conditions.

This compact and durable station, together with the non-vented water level sensor, provides reliable monitoring, even when deployed in harsh conditions. The optional integrated solar panel or battery power, with a wide range of plug-and-play smart sensors, supports flexible environmental monitoring.

Outstanding Features

• Station-side alarms for water flow and accumulated rainfall triggered at time of measurement
• Non-vented ceramic water level sensor with a choice of four ranges
• Interchangeable, Kevlar-reinforced water level sensor cables
• Integrated barometric pressure sensor
• Compact IP66/NEMA 4X enclosure
• Built-in LCD confirms proper setup and operation
• Two power options:
• Integrated 1.7 W solar panel with rechargeable battery pack
• 5 W and 15 W external solar panels can be added (RX2104 only)
• User-replaceable AA lithium batteries
• Inputs for five plug-and-play sensors
• Up to 10-minute connections rates via 4G cellular data plans
• Cloud-based monitoring and data access through HOBOlink
• Available with stainless-steel or titanium sensor ends
• 3-point NIST-traceable calibration certificate included for the water pressure sensor

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• • Technical specifications (English)
• • HOBO RX2100 MicroRX Station
  • Grease packet
  • Cable ties
  • Screws and washers
  • Batteries
  • Manual
• • HOBOlink Software
  • Sensor
• • Sensor
  • Accessory
• • User Manual (English)
  • Technical specifications (English)

EO2023903

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Onset USB Interface Cable

$ 10.00 USD

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Relay Module for HOBO RX3000 Remote Monitoring Station

$ 117.90 USD

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Onset Water Level Sensor Cable for RXMOD-W1

$ 356.50 USD

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Onset Wind Speed Smart Sensor

$ 275.00 USD

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Onset Wind Direction Smart Sensor

$ 402.50 USD

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Onset EC-5 Soil Moisture Smart Sensor

$ 160.00 USD

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HOBO 12-Bit Temperature/RH Smart Sensor with 2 m Cable

$ 189.00 USD

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Onset AC Power Adapter for HOBO U30 Stations

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Solar Panels for Onset Stations

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Onset Fresh Water Level Data Logger HOBO U20

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Onset Smart 12-bit Temperature Sensors

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Onset Data Logger Temp Water TidbiT v2

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Onset HOBO Waterproof Conveyor Station

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Onset Couplers for Data Loggers

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Onset HOBO Pendant Event Data Logger for Rainfall

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HOBO Pendant Event Data Logger for Rainfall

Submersible HOBO Temperature and Light Data Logger for Efficient Monitoring

HOBO data loggers require HOBOware software (USB interface cable included with CD) and a communication device. See compatible items below.

Records up to 160 inches of rain (RG3) or 3200 mm (RG3-M) at rates up to 12.7 cm (5 inches) per hour. The rainfall data logger system is battery-powered and includes a HOBO Pendant Event Data Logger (UA-003-64) with a rain collector. Easily records precipitation, time, and duration data, as well as temperature when used with an optional solar radiation shield (RS1 Solar Radiation Shield, or M-RSA). A station base or shuttle is required to collect the data.

Key Features:

• High-quality rain collector includes a HOBO Pendant Event data logger. A station base or shuttle is required.
• Date and time are stored for each drop—providing the necessary details to determine rainfall rates and duration.
• Reliable, field-tested rain collector.
• Compatible with HOBOware and HOBOware Pro software for logger configuration, graphing, and analysis.
• Also records temperature when used with a solar radiation shield (optional).

In which environment does this data logger work?

This data logger works in an outdoor environment.

Which measurements does this data logger support?

The RG3 and RG3-M devices support the following measurement: Precipitation.

• Specifications
• In the Box
• Required Items
• Optional Items

• Features	Rain Collector
  Maximum Precipitation Rate	12.7 cm
  Accuracy	± 1.0% (up to 1 inch/hour for RG3 or 20 mm/hour for RG3-M)
  Resolution	0.0254
  Calibration	0.2 mm
  Operating Range	0 ° to + 50 °C (+32 ° to +122 °F)
  Storage Temperature Range	-20 ° to + 70 °C (-4 ° to +158 °F)
  Environmental Rating	Waterproof
  Housing	15.24 cm aluminum collector
  Dimensions	25.72 cm height x 15.24 cm diameter - 15.39 cm receiving aperture
  Weight	1.2 kg
  Features	Logger
  Time Stamp Resolution	1.0 seconds
  Accuracy	± 1 minute per month at 25°C (77°F), see Plot B on page 10.
  Operating Range	-20 ° to 70 °C (-4 ° to 158 °F)
  Environmental Rating (for the logger used outside the rain collector)	Approved for NEMA 6 and IP67; Suitable for outdoor deployment
  Battery	Lithium battery
  Memory	64K bytes - 16K to 23K events when only rain is recorded
  Materials	Polypropylene case; stainless steel screws

• • HOBO Rain Gauge Data Logger (1)
  • tipping Rain Collector
  • Hose Clamps (2)
  • Screws (3)
• Software
  
  • HOBOware Pro Software CD or USB Drive (USB cable included)
  • HOBOware Pro Software - Mac/Win (Download only)
  Communications (Choose a Station)
  
  • Onset USB Optical Base Station for HOBO Pendant®.
  • Onset USB Optical Base Station for HOBO.
  • Onset Waterproof Transport Station for HOBO.
  • USB Cable.
• Accessories
  
  • Solar Radiation Shields.
  • NIST Temperature Point Certification.
  • NIST Traceable Certification Installation Rate.
  • Compliance Certification.
  • Pelican Case.
  Maintenance
  
  • Replacement Batteries (Pack of 5).
  • Replacement Pendant® Housing Kit.
  • Onset Waterproof Transport Station for HOBO.

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Onset HOBO Pendant Temperature / Light Data Loggers

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Onset HOBO Temperature and Relative Humidity Data Logger Bluetooth

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The Onset HOBO MX1101 Data Logger measures and wirelessly transmits temperature and relative humidity data to mobile devices via Bluetooth Low Energy (BLE) technology. The stand-alone wireless data logger, which operates with Onset’s free HOBOmobile® app for configuring and managing logger data, allows you to access data at any time from iOS or Android mobile devices within a 100-foot range and does not require any dedicated equipment beyond a mobile device to configure the logger or read data.

With Onset's free HOBOmobile® app, you can view data in graphs, check the operational status of loggers, set alarm notifications, and share data files.

Key Features:

• Wireless communication via Bluetooth Low Energy (BLE) technology.
• Easy to set up and download using the free HOBOmobile app.
• High and low visual and audible alarm thresholds.
• Stores 84,000 readings.
• Accuracy: +/- 0.2°C and +/- 2% RH.
• Find Me / locator function.
• Proprietary connectivity technology.

What environment does this data logger operate in?

Operates in an indoor environment.

What measurements does this data logger support?

Relative humidity and temperature.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Features	Temperature Sensor
  Operating Range	-20° to 70° C (-4° to 158° F)
  Accuracy	± 0.21 ° C from 0 ° to 50 ° C (± 0.38 ° F from 32 ° to 122 ° F)
  Resolution	0.024 ° C at 25 ° C (0.04 ° F at 77 ° F)
  Stability (drift)	<0.1 ° C (0.18 ° F) per year
  Features	HR Sensor *
  Operating Range	1% to 90%, non-condensing
  Accuracy	± 2.0% from 20% RH to 80% RH typical up to ± 4.5%, including hysteresis at 25 ° C (77 ° F); below 20% RH and above 80% RH ± 6% typical
  Resolution	0.01%
  Drift Stability	<1% per year typical
  Features	Response Time
  Temperature	7:30 minutes in moving air 1 m/s (2.2 mph)
  RH	20 seconds to 90% in 1 m/s (2.2 mph) airflow
  Features	Logger
  Radio Power	1 mW (0 dBm)
  Transmission Range	1 mW (0 dBm)
  Wireless Data Standard	Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
  Logger Operating Range	-20 ° to 70 ° C (-4 ° to 158 ° F); 0 to 95% RH (non-condensing)
  Logging Rate	1 second to 18 hours
  Memory	84,000 measurements
  Power	3.6 V lithium battery (included)
  Dimensions	6.4 x 4.4 x 1.6 cm (2.5 x 1.7 x 0.6 in)
  Weight	113 grams (4 oz)
  Agency Approvals	CE, RoHS, WEEE

• • HOBO MX1101 Data Logger
  • 3.6 V Lithium Battery (installed)
  • Mounting Strap
  • Quick Start Guide
• • HOBOmobile® App (available for iOS and Android)
• • USB Adapter (for connecting with a PC or Mac)
  • Additional Mounting Options (if needed)
• • HOBO MX1101 User Manual
  • HOBO MX1101 Quick Start Guide

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Onset U2X Protective Case for HOBO Data Loggers

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Onset HOBO Rain Gauge Data Logger

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Onset Data Logger for HOBO UX100 One-Channel Thermocouples

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Onset HOBO UX100-014M Thermocouple Data Logger

Monitor extreme temperatures with professional precision using this compact single-channel logger, ideal for industrial applications, laboratories, and scientific research.

The HOBO UX100-014M is a high-performance data logger designed to measure and record temperatures in a wide range of applications using external thermocouples. This device stands out for its versatility, supporting J, K, T, E, R, S, B, or N type thermocouples, allowing it to be used in everything from cryogenic processes to high-temperature ovens. Its integrated LCD screen makes it easy to view real-time readings, memory status, and battery levels. With USB connectivity and HOBOware software, setup and data analysis are fast and efficient, ensuring data integrity in critical environments.

Key Features

• Sensor Versatility: Compatible with multiple thermocouple types to cover extremely wide temperature ranges.
• Real-Time LCD Display: Allows you to check readings and operational status without needing to connect the device to a computer.
• High Memory Capacity: Stores thousands of measurements, ensuring detailed records over long periods of time.
• Compact and Durable Design: Built with high-strength plastic and featuring a screw mount for fixed and secure installation.
• Alarm Management: On-screen visual alarm function that alerts you when preset temperature limits are exceeded.
• Professional Software: Compatible with HOBOware for fast data downloads and detailed graphical analysis.

• Specifications
• In the Box
• Required Items
• Optional Items

• Brand	Onset / HOBO
  Model	UX100-014M
  Connector Type	Screw Terminal (Screw Mount)
  Number of Channels	1 (One thermocouple channel)
  Number of Contacts	2
  Number of Poles	2
  Material	High-resistance plastic
  Interface	USB 2.0
  Weight	0.1 lb (45 g)

• • 1x HOBO UX100-014M Data Logger
  • 1x USB Cable for PC connection
• • Thermocouple sensor (Type J, K, T, E, R, S, B, or N depending on application)
  • HOBOware Software (Available as a free download)
• • Protective carrying case
  • NIST Calibration Certificate
  • Additional mounting brackets

EO20260422

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Onset USB Cable

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Onset USB Cable

Reliable USB connectivity for HOBO weather stations

The USB Cable for HOBO weather stations is a reliable and durable solution for connecting your HOBO devices to a computer. This cable is specifically designed to ensure fast and stable data transmission between weather stations and monitoring software, offering flexibility for data download and device maintenance.

Key Features:

• High-strength cable length
• High-speed USB connection
• Compatible with HOBO weather stations
• Durable and resistant materials
• Easy to connect and use

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Specifications
  Cable length	1.8 meters
  Connector type	USB Type-A to Micro-B
  Compatibility	HOBO weather stations
  Transfer speed	High-speed USB 2.0

• • 1 USB Cable (1.8 meters)
• • None
• • None
• • None

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Onset HOBO Data Logger Micro Stations

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HOBO Micro Station Data Loggers

Multichannel Data Logging Solution for Microclimates

Robust and compact, the redesigned HOBO USB Micro Station is a weather-resistant data logger for multichannel microclimate monitoring. This battery-powered station supports up to five plug-and-play smart sensors and features a hinged door for quick and easy sensor installation. The Micro Station comes with a built-in USB port for fast and efficient data readout to a computer and an integrated mounting tab for easy installation.

Features

• Compact size for easy deployment.
• IP66 weatherproof housing for harsh environments.
• Direct USB download—no adapter cable required.
• Includes five smart sensor inputs.
• Hinged door and integrated mounting tabs.
• Operates up to one year with four standard AA batteries.
• Compatible with HOBOware and HOBOware Pro software for logger setup, graphing, and analysis.

What environments does this station operate in?

Indoor and outdoor environments.

What measurements does this station support?

4-20 mA, Amp Hour (Ah), barometric pressure, DC voltage, kilowatt hours (kWh), leaf wetness, light intensity, power factor (PF), pulse input, rain, relative humidity, soil moisture, temperature, reactive volt-amperes, reactive volt-amp hours, volt-amperes (VA), water flow, watt-hours (Wh), watts (W), and wind.

• Specifications
• What's in the Box
• Required Items
• Optional Items
• Documents

• Features	Logger
  Operating Range	-20 ° to 50 °C (-4 ° to 122 °F) with alkaline batteries -40 to 70 °C (-40 to 158 °F) with lithium batteries
  Smart Sensor Connectors	5
  mart Sensor Data Channels	Maximum of 15 (some smart sensors use more than one data channel; see sensor manual for details)
  Smart Sensor Network Cable Length	100 m maximum(328 ft maximum)
  Logging Interval	1 second to 18 hours
  Start Modes	Immediate, at interval, push button, or delayed start
  Memory Modes	Stop when full or wrap when full
  Memory	512 KB non-volatile flash data storage
  Accuracy	0 to 2 seconds for the first data point and ±5 seconds per week at 25 °C (77 °F)
  Battery Type	Four AA 1.5 V alkaline batteries for operating conditions of -20° to 50°C (Four AA 1.5 V alkaline batteries for operating conditions of -4° to 122°F) Four AA 1.5 V lithium batteries for operating conditions of -40 to 70°C (Four AA 1.5 V lithium batteries for operating conditions of -40 to 158°F)
  Battery Life	1 year, typical use (up to five sensors with 1 minute or greater logging interval)
  Communication Type	USB 2.0 interface
  Full Memory Download Time	4 minutes
  Enclosure Access	Hinged door secured with a latch and eyelet for user-supplied padlock
  Materials	Outer enclosure: Polycarbonate/PBT blend with stainless steel hinge pins; Gasket: Silicone foam; Cable channel: EPDM rubber
  Dimensions	17.04 x 11.94 x 4.47 cm
  Weight	414 g
  Environmental Rating	IP50
  CE	CE marking identifies this product as complying with all relevant directives in the European Union (EU)

• • HOBO Micro Station Data Logger (1)
  • Four 1.5V AA alkaline batteries (4)
  • Rubber plugs
  • Grease pack
  • Screws and washers
  • Cable ties
• Software
  
  • HOBOware Pro software CD or USB drive (USB cable included).
  • HOBOware Pro software - Mac/Win (download only).
• Accessories
  • Lithium batteries.
  • Smart Sensor Consolidator Box Adapter.
  • Cable Caddy.
  • Pelican Case.
  • USB cable.
  • Compliance Certification.
  • Grounding Cable for H21-USB Cable.
  • Grounding Kit.
  Tripod Parts, Kits, and Masts
  
  • 3 m Mast.
  • 1.5 m Mast.
  • 3 m HWS Tripod Tower with Mast.
  • 3 m Tripod Kit for HOBO Weather Station.
  • 2 m HWS Tripod Tower with Mast.
  • U-Bolts.
  Communications
  • Micro Station Adapter Cable.
  • HOBO U-Shuttle.
  • HOBO® U30 Shuttle.
  • USB Interface Cable(s).
  • PC Interface Cable.
  Maintenance
  • Lithium batteries.
  • Replacement Desiccant Pack for HOBO Micro Station.
  • Dome Plugs for Accessing Serial Communication Port Replacement.
  • Replacement O-Ring for 85-DOMEPLUG.
  • Replacement O-Ring for 85-DOMEPLUG-1.
• • Installation Manual (EN)
  • Manual (FR)

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Ashcroft Gauge Pressure Sensor (200-psig)

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Onset Smart Leaf Moisture Sensor

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Monitor Leaf Moisture with Precision for Environmental and Agricultural Research

The Smart Leaf Wetness Sensor Provides Accurate and Stable Measurements for Research, Agriculture, and Environmental Monitoring Applications in Outdoor Environments without the Need for Additional Coatings.

The Smart Leaf Wetness Sensor is designed to provide reliable data on moisture presence across leaf surfaces in agricultural, environmental, and scientific research applications. Its advanced capacitive grid technology reduces sensitivity to surface residue, delivering more consistent and accurate measurements compared to traditional resistive-grid sensors.

The sensor arrives ready to use and does not require painting or additional coatings. It is also pre-conditioned to ensure long-term stability and consistency between sensors, making it ideal for continuous monitoring projects requiring dependable comparative data.

A 3 m cable and adjustable mounting bracket are included, allowing the sensor to be positioned at various angles to simulate the natural drying characteristics of the plants being studied. Its rugged design enables reliable operation in demanding outdoor environmental conditions.

Características Destacadas

• No painting or coating required.
• Capacitive grid technology less sensitive to surface residue.
• Pre-conditioned for consistent measurements and long-term stability.
• Includes a 3 m cable and adjustable mounting bracket.
• Designed for agricultural, environmental, and scientific applications.
• Compatible with multiple weather station data loggers.
• Allows simulation of real leaf drying conditions.
• Durable design for outdoor environments.
• Wide operating range for various environmental conditions.
• High accuracy and repeatability.

• Specifications
• In the Box
• Required Items
• Optional Items
• Documents

• Model	Smart Leaf Wetness Sensor
  Measurement Range	0 (dry) to 100% (wet).
  Operating Range	-40 °C to 70 °C (-40 °F to 158 °F).
  Repeatability	± 5%.
  Resolution	0.59%.
  Stability	± 5% per year.
  Measurement Averaging Option	No.
  Sensor-to-Sensor Interchangeability	± 10% within the 10-90% range.
  Housing	No coating required.
  Sensor Type	Capacitive grid.
  Sensor Plate Dimensions	4.7 cm x 5.1 cm.
  Tube Dimensions	12.2 cm length x 1.8 cm diameter.
  Cable Length	3 m.
  Smart Sensor Network Cable Length	3 m.
  Weight	127 g.
  Mounting Bracket	20 cm length with adjustment between 0° and 90°.
  Number of Data Channels	1.
  Certification	CE marked in compliance with relevant European Union directives.
  Operating Environment	Outdoor.
  Supported Measurement	Leaf wetness.

• • 1x Smart Leaf Wetness Sensor.
• • USB Weather Station Data Logger U30.
  • USB Micro Station Data Logger.
  • RX3000 Remote Monitoring Station Data Logger.
  • USB Weather Station Starter Kit U30.
• • Weatherproof extension cable.
  • 2 m smart sensor extension cable.
  • 5 m smart sensor extension cable.
  • 10 m smart sensor extension cable.
  • 25 m smart sensor extension cable.
  • Certificate of compliance.
• • Smart Leaf Wetness Sensor User Manual (English).

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Onset HOBO Temperature / RH Bluetooth Data Loggers ²⁶

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HOBO Temperature/RH Bluetooth Data Loggers

Advanced HOBO® data loggers for precise monitoring of multiple environmental variables

The HOBO® MX2301A, MX230X, MX2305, MX2302A, MX2303, and MX2304 Data Loggers are versatile and reliable devices designed to monitor a wide range of environmental parameters across industrial, agricultural, and scientific applications. These loggers are equipped with high-precision sensors to measure variables such as temperature, humidity, pressure, and other critical factors, and they feature extended data storage capabilities. They are ideal for use in outdoor environments, laboratories, or industrial facilities that require continuous monitoring.

Each model is configured to meet specific needs, ranging from options with multiple inputs to devices with advanced measurement and wireless communication capabilities. The devices are designed to simplify installation and data analysis, with connectivity options such as Bluetooth to enable easy real-time data transmission to mobile devices.

Key Features

• MX2301A Model: A weatherproof data logger with integrated temperature and relative humidity sensors. Leveraging Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running Onset’s free HOBOconnect app, this logger delivers high-accuracy measurements even in harsh outdoor environments.
• MX2306 and MX2307 Models: Fully integrated, low-cost soil moisture data loggers with Bluetooth wireless data download. Available in two models—one that measures soil moisture (HOBO MX2306) and another that measures both soil moisture and soil temperature (HOBO MX2307)—these loggers are ideal for researchers and growers seeking accurate data to conserve water, improve crop yields, reduce harmful runoff, and protect ecosystems.
• MX2302A Model: A weatherproof data logger with external temperature and relative humidity sensors. Using Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running the free Onset HOBOconnect app, this logger provides high-accuracy measurements in harsh outdoor environments.
• MX2303 Model: A weatherproof data logger with two external temperature sensors. Using Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running the free Onset HOBOconnect app, this logger offers high-precision measurements in harsh outdoor environments.
• MX2304 Model: A weatherproof data logger with one external temperature sensor. Using Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running the free Onset HOBOconnect app, this logger provides high-accuracy measurements in harsh outdoor environments.
• MX2305 Model: A weatherproof data logger with one internal temperature sensor. Using Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running the free Onset HOBOconnect app, this logger delivers high-accuracy measurements in harsh outdoor environments.

• Specifications
• In the Box
• Required Items
• Optional Items

• Temperature Sensor
  Range	MX2301A and MX2305 internal sensors: -40 to 70°C (-40 to 158°F) MX2302A external temperature sensor: -40 to 70°C (-40 to 158°F) MX2303 and MX2304 external sensors: -40 to 100°C (-40 to 212°F), with sensor tip and cable immersed in fresh water up to 50°C (122°F) for one year
  Accuracy	±0.25°C from -40 to 0°C (±0.45°F from -40 to 32°F) ±0.2°C from 0 to 70°C (±0.36°F from 32 to 158°F) ±0.25°C from 70 to 100°C (±0.45°F from 158 to 212°F), MX2303 and MX2304 only
  Resolution	MX2301A and MX2302A: 0.02°C (0.036°F) MX2303, MX2304, and MX2305: 0.04°C (0.072°F)
  Drift	0.01°C (0.018°F) per year

  
  

  Relative Humidity Sensor* (MX2301A and MX2302A only)
  Range	0 to 100% RH, -40° to 70°C (-40° to 158°F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
  Accuracy	±2.5% from 10% to 90% RH (typical) up to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
  Resolution	0.01%
  Drift	1% per year typical

  
  

  Response Time (typical, to 90% of change)
  Temperature	Without solar radiation shield: MX2301A internal sensor: 17 minutes in air moving at 1 m/s With RS1/M-RSA solar radiation shield: MX2301A internal sensor: 24 minutes in air moving at 1 m/s With RS3-B solar radiation shield: Same as above
  MX2302A External Sensor	Without solar radiation shield: 3 minutes, 45 seconds in air moving at 1 m/s With RS1/M-RSA solar radiation shield: 7 minutes, 45 seconds in air moving at 1 m/s With RS3-B solar radiation shield: 6 minutes, 30 seconds in air moving at 1 m/s
  MX2303/MX2304 External Sensors	Without solar radiation shield: 3 minutes in air moving at 1 m/s; 20 seconds in stirred water With RS1/M-RSA solar radiation shield: 7 minutes in air moving at 1 m/s With RS3-B solar radiation shield: 4 minutes in air moving at 1 m/s
  MX2305 Internal Sensor	Without solar radiation shield: 17 minutes in air moving at 1 m/s With RS1/M-RSA solar radiation shield: 24 minutes in air moving at 1 m/s With RS3-B solar radiation shield: Same as above

  
  

  RH
  MX2301A Internal Sensor	Without solar radiation shield: 30 seconds in air moving at 1 m/s With RS1/M-RSA solar radiation shield: 40 seconds in air moving at 1 m/s With RS3-B solar radiation shield: Same as above
  MX2302A External Sensor	Without solar radiation shield: 15 seconds in air moving at 1 m/s With RS1/M-RSA solar radiation shield: 30 seconds in air moving at 1 m/s With RS3-B solar radiation shield: 30 seconds in air moving at 1 m/s

  
  

  Logger
  Operating Range	-40° to 70°C (-40° to 158°F)
  Radio Power	1 mW (0 dBm)
  Transmission Range	Approximately 30.5 m (100 ft) line of sight
  Wireless Data Standard	Bluetooth Low Energy (Bluetooth Smart)
  Logging Rate	1 second to 18 hours
  Logging Modes	Fixed interval (normal, statistical) or burst
  Memory Modes	Wrap when full or stop when full
  Start Modes	Immediate, push-button, date & time, or next interval
  Stop Modes	When memory is full, push-button, date & time, or after a set logging period
  Time Accuracy	±1 minute per month from 0° to 50°C (32° to 122°F)
  Battery Type	3.6-volt 2/3 AA lithium battery, user-replaceable
  Battery Life	2 years typical with 1-minute logging interval and Bluetooth Always On enabled; 5 years typical with 1-minute logging interval and Bluetooth Always On disabled. Faster logging intervals, statistical sampling intervals, burst logging, staying connected to the app, excessive downloads, and paging may impact battery life.
  Memory	MX2301A and MX2302A: 128 KB (63,488 measurements max) MX2303, MX2304, and MX2305: 128 KB (84,650 measurements max)
  Full Memory Download Time	Approximately 60 seconds; may take longer the farther the device is from the logger
  Dimensions	Logger enclosure: 10.8 x 5.08 x 2.24 cm External temperature sensor diameter: 0.53 cm External temperature/RH sensor diameter: 1.17 cm External sensor cable length: 2 m Solar radiation shield mount: 10.8 x 8.3 cm
  Weight	Logger: 75.5 g Solar radiation shield mount: 20.4 g
  Materials	Acetal, silicone gasket, stainless steel screws

• • 1x HOBO Temperature Data Logger
  • Screws
  • Cable Ties
• • HOBOMobile App (Free)
  • Compatible Smartphone or Tablet
• • Accessories
    
    • Solar Radiation Shields
    • NIST Temperature Point Certification
    • NIST Relative Humidity Initial Calibration Service Certification
    • NIST Traceable Certification Installation Charge
    • Certificate of Compliance
    Maintenance
    
    • Replacement Batteries (2-pack)

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Onset Data Logger for Carbon Dioxide, Temperature and Relative Humidity

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Onset Amp Split-Core AC Sensor

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Onset CTV-C 10 - 100 Amp Split-Core AC Current Sensor

Safely and efficiently measure energy consumption with a split-core design that enables fast installation without interrupting the power supply.

The Onset CTV-C is a high-performance AC current sensor specifically designed for use with HOBO U12, UX120, and ZW series data loggers equipped with external input channels. This sensor accurately monitors ranges from 10 to 100 Amps AC in single-phase 50 Hz or 60 Hz systems. Its most notable feature is the self-gripping split-core design, which allows for instant and secure attachment around active conductors. Being UL listed and powered by induction from the line voltage, it is the ideal tool for energy audits, load management, and monitoring industrial or commercial electrical installations.

Key Features

• Non-Invasive Installation: The split-core design allows the sensor to "clamp" around the wire without needing to disconnect the load or cut the power.
• Certified Safety: UL listed, ensuring compliance with strict international electrical safety standards.
• Self-Powered: The power required for the sensor's operation is induced directly from the line being measured, eliminating the need for external batteries.
• Wide Compatibility: Seamlessly integrates with HOBO U12, UX120 data loggers and ZW wireless nodes.
• Versatile Operation: Optimized for sine waves and load power factors ranging from 0.5 to 1.0, whether leading or lagging.

• Specifications
• In the Box
• Required Items
• Optional Items

• Brand	Onset / HOBO
  Model	CTV-C
  Measurement Range	10 to 100 Amps AC
  Sensor Type	Split-core
  Input Frequency	50 Hz or 60 Hz (Sine wave)
  Phase	Single-phase
  Power Factor	0.5 to 1.0 (Lead or Lag)
  Certifications	UL Listed
  Weight	1.5 lb (680 g)

• • 1x CTV-C Split-Core AC Current Sensor (10-100A)
• • Compatible Data Logger (HOBO U12, UX120, or ZW Series)
  • External input cable (if required by the specific logger model)
• • HOBOware Software for data analysis
  • Additional current sensors for different ranges (CTV-A, CTV-B, CTV-D)

EO20260422

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Onset Smart Rain Gauge Sensor

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Onset Temperature Sensors for Air / Water / Soil

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