Dissolved Oxygen (DO)

Dissolved Oxygen Sensors for YSI Pro-Series Meters ²⁶

$ 234.50 USD

Sensors for Pro20, Pro20i, Pro1020, Pro2030 and Pro-Plus instruments. easy to replace by the user....

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Hanna Professional Multi-Parameter Waterproof Meter pH / ORP / EC / DO ²⁵

$ 1,770.99 USD

Hanna Professional Waterproof Multiparameter Meter for Advanced Water Quality Monitoring

A rugged, field-ready solution that tracks up to 12 water quality parameters with laboratory precision, designed to deliver noise-free data in the most demanding aquatic environments.

The Hanna Professional Multiparameter Meter is an elite portable system engineered for comprehensive water analysis in lakes, rivers, and oceans. Built to withstand extreme field conditions, the meter features an IP67-rated waterproof housing while the multisensor digital probe carries an IP68 rating for submersion. This intelligent system monitors 6 measured and 6 calculated parameters—including pH, ORP, conductivity, and dissolved oxygen—using a microprocessor-driven probe that ensures noise-free data transmission over distances up to 100 meters. With its backlit dot-matrix display and intuitive interface, environmental professionals can easily visualize complex data through on-screen graphics, making it the definitive choice for accurate, real-time aquatic monitoring.

Key Features

• Comprehensive Parameter Tracking: Monitors 12 critical water quality indicators including pH, EC, DO, and salinity.
• Advanced Digital Communication: Digital probe technology provides noise-free, stable data transmission up to 100 meters.
• Rugged Environmental Protection: IP67 rated meter and IP68 rated probe designed for heavy field use in freshwater and seawater.
• Intelligent Sensor System: Features automatic sensor recognition and color-coded, field-replaceable sensors for easy maintenance.
• Smart Environmental Compensation: Automatic barometric pressure and temperature compensation ensure accuracy in changing climates.
• Massive Data Logging: Stores up to 45,000 logs with programmable intervals from one second to three hours.

• Specifications
• In the Box
• Optional Items
• Documents

• pH Range / Resolution	0.00 to 14.00 pH / 0.01 pH
  pH Accuracy	±0.02 pH
  mV Range / Accuracy	±600.0 mV / ±0.5 mV
  ORP Range / Accuracy	±2000.0 mV / ±1.0 mV
  Conductivity (EC) Range	0 to 200.0 mS/cm (absolute up to 400.0 mS/cm)
  EC Accuracy	±1% of reading or ±1 µS/cm
  TDS Range	0 to 400.0 ppt (g/L)
  Salinity Range	0.00 to 70.00 PSU
  Dissolved Oxygen Range	0.0 to 500.0% / 0.00 to 50.00 ppm (mg/L)
  Atmospheric Pressure Range	450 to 850 mm Hg (multiple units available)
  Temperature Range	-5.00 to 55.00°C (23.00 to 131.00°F)
  Memory Logging	45,000 logs (continuous or on-demand)
  Battery Life	~360 hours continuous use (no backlight)
  Protection Rating	Meter: IP67 / Probe: IP68
  Probe Depth	Maximum 20 m (66')

• • 1x Professional Multiparameter Meter
  • 1x HI7698194 Digital Probe
  • 1x pH Sensor
  • 1x EC Sensor
  • 1x DO Sensor
  • 1x Electrolyte Solution
  • 5x DO Membrane Caps
  • 5x Grease Syringes for O-ring lubrication
  • 1x Hanna PC Software
  • 1x Micro USB Cable
  • 4x 1.5V AA Batteries
  • 1x Durable Carrying Case
  • 1x User Manual
  • 1x Quick Start Guide
  • 1x Quality Certificate
• • pH 7.01 Solution (500 ml)
  • pH 4.01 Solution (500 ml)
  • pH 10.01 Solution (500 ml)
  • General Use Cleaning Solution (500 ml)
  • Storage Solution (500 ml)
• • Installation Manual (English)
  • Technical Specifications Manual (Spanish)

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YSI Professional Series Pro20i Dissolved Oxygen Instrument ²⁶

$ 1,467.50 USD

Accuracy and Durability in the Field: YSI Pro20i Dissolved Oxygen Meter

A ruggedly designed instrument featuring interchangeable sensors and instant calibration, making it the ultimate tool for reliable dissolved oxygen monitoring in the most demanding natural environments.

The YSI Pro20i is a professional-grade portable meter designed to deliver high-precision dissolved oxygen (DO) and temperature measurements in the field. Built to withstand harsh conditions, it features an integrated, non-detachable cable available in various lengths and a robust, waterproof housing that ensures longevity. With the flexibility to choose between polarographic or galvanic sensors and the convenience of "One Touch Cal" technology, the Pro20i provides fast, laboratory-quality results for aquaculture, environmental research, and wastewater management, even in the most challenging outdoor settings.

Key Features

• One-Step Calibration: The One Touch Cal function enables precise calibration in under 3 seconds for maximum efficiency.
• Integrated Cable System: Features a factory-sealed integral cable available in 1, 4, and 10-meter lengths for enhanced durability.
• Extreme Field Durability: IP-67 waterproof rating and rubber over-molded case, drop-tested from 1 meter to ensure survival in the field.
• Interchangeable Sensor Technology: User-replaceable sensors with a choice between polarographic or galvanic models to suit specific project needs.
• Internal Barometer: Includes a built-in barometer to compensate for pressure changes and ensure superior DO measurement accuracy.
• High-Visibility Interface: Features a backlit graphic display and glow-in-the-dark keypad, perfectly readable even with polarized sunglasses.

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

• Cable	Integrated, available in 1, 4, and 10 meters
  Compatible Sensors	Polarographic or Galvanic (User-replaceable)
  Calibration	One Touch Cal (Fast, in 3 seconds)
  Memory	Stores up to 50 data sets
  User Interface Languages	English, Spanish, French, German
  Display	Graphic, backlit, visible with polarized sunglasses
  Power Supply	2 alkaline C-cell batteries (~400 h without backlight)
  Response Time	95% in 8 seconds with standard membrane
  Certifications	RoHS, CE, WEEE, IP-67, 1-meter drop test

• • 1x YSI Pro20i handheld meter with integrated cable
  • 1x Dissolved oxygen sensor (Polarographic or Galvanic)
  • 1x Membrane cap kit
  • 2x C-cell batteries
  • 1x User manual
• • Dissolved oxygen calibration solution
• • Additional galvanic or polarographic sensor
  • Membrane maintenance kit
  • Padded carrying case
  • Tripod or belt clip
• • Specification Sheets (English)
  • User Manual (English)
  • Technical Notes (English)

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Onset HOBO U26-001 Dissolved Oxygen Data Logger

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HOBO® U26 High-Precision Optical Dissolved Oxygen Datalogger

Accurately Measures Dissolved Oxygen And Temperature With A Durable Optical Sensor, Delivering Reliable Data For Scientific Monitoring And Field Research.

The HOBO® U26 Dissolved Oxygen datalogger records dissolved oxygen concentration and water temperature with high precision and reliability. It uses an optical sensor that ensures long-term stability and eliminates accuracy drift over time.

The free HOBOware® software, available for Windows and Mac, allows you to download, visualize, and configure all instrument parameters such as date and time. Communication with the computer is done through the universal optical USB base station BASE-U-4 or the U-DTW-1 shuttle (not included).

Designed for harsh aquatic environments, the datalogger features a compact and corrosion-resistant construction that ensures long-term durability. The included lithium battery provides an extended operational lifespan before replacement is needed.

Key Features

• High-Precision Optical Sensor That Prevents Long-Term Accuracy Drift.
• Storage Capacity Of 21,700 Records For Extended Monitoring Sessions.
• Free HOBOware Software For Data Visualization And Configuration On Windows And Mac.
• Corrosion-Resistant Construction Rated For Operation Down To 100 M Depth.
• Long-Life Lithium Battery With Approximately 3 Years Of Operation.
• Compact And Lightweight Design For Easy Field Deployment.

• Specifications
• In the Box
• Required Items
• Documents

• Memory Capacity	21,700 Records
  Dissolved Oxygen - Range	0 to 30 mg/L
  Dissolved Oxygen - Resolution	0.02 mg/L
  Dissolved Oxygen - Accuracy	±0.2 mg/L
  Temperature - Range	-5 °C to 40 °C
  Temperature - Resolution	0.02 °C
  Temperature - Accuracy	±0.2 °C
  Power Supply Voltage	3.6 VDC
  Battery Type	1 × 1/2 AA Lithium
  Battery Life	Approx. 3 Years
  Output Signal	Optical
  Operating Temperature	-5 °C to 40 °C
  Maximum Depth	100 m
  Material	High-Strength Plastic
  Dimensions	∅ 39.6 × 266.7 mm
  Weight	464 g

• • 1x HOBO® U26 Dissolved Oxygen Datalogger
  • 1x 1/2 AA Lithium Battery (Installed)
  • 1x Quick Start Guide
  • 1x HOBOware® Software Download Information
• • 1x BASE-U-4 Optical USB Base Station or U-DTW-1 Waterproof Shuttle (Not Included)
• • HOBOware® Software for Windows and Mac (Downloadable)
  • HOBO® U26 User Guide (Included with Device)

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YSI Pro20 Dissolved Oxygen Meter ²⁶

$ 804.50 USD

YSI Pro20: Dissolved Oxygen Accuracy, Even Under Extreme Conditions

Rugged, portable dissolved oxygen meter with replaceable sensors, fast calibration, and IP-67 military-grade design. Ideal for both the laboratory and field, offering reliable data with low operating costs.

The YSI Pro20 dissolved oxygen meter is a rugged, user-friendly instrument for dissolved oxygen measurement. The Pro20 can be used in the lab or the field and can go from one to the other in seconds.

User-replaceable sensors and cables and convenient One Touch Cal feature makes it extremely user friendly. Mil-spec (military spec) connectors, IP-67 waterproof and rubber over molded case, and 1-meter drop tests ensure the instrument remains in your hands to provide years of sampling even in the harshest field conditions. The feature set of the Pro20 results in a low total cost of ownership over the life of the product.

Fast response times with the Polarographic or Galvanic dissolved oxygen sensors allow you to complete your sampling routine quickly. The long life of the Polarographic sensor saves time and money and reduces your overall cost. The Galvanic sensor enables you to start sampling immediately without a warm-up period. Either sensor you choose for the field will give you accurate, quality data.

Instrument only. Cables, probes / sensors, and accessories are sold separately.

Key Features

• Internal barometer for highest accuracy.
• Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater.
• One Touch Cal calibrates within 3 seconds with the push of a button.
• Stores 50 data sets.
• Graphic, backlit display and glow in the dark keypad.
• Available with 1, 4, 10, 20, 30 or 100-meter cables.
• View display with polarized sunglasses on.
• Fastest response time on the market with 95% response in 8 seconds with standard membrane.
• Multiple languages include English, Spanish, French and German.
• User replaceable sensors and cables .

YSI Pro20, Dissolved Oxygen Meter, Portable, Rugged, Waterproof IP-67, Barometer, Polarographic Sensor, Galvanic Sensor, One Touch Cal, Field Use, Lab Use, Fast Response, BOD Probe, Replaceable Sensors, Data Storage, Long Battery Life, RoHS, CE Certified

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

(S 22/9/2021, S 20210415)

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Portable Dissolved Oxygen Meter TRACER PockeTester ²⁶

$ 718.25 USD

TRACER PockeTester™ Portable Dissolved Oxygen Meter for Precise Field Results

A compact and advanced instrument designed for measuring oxygen levels in diverse water conditions, making it the ideal solution for aquaculture, environmental monitoring, and laboratory applications.

The TRACER PockeTester™ for dissolved oxygen is a reliable and portable tool that redefines ease of use in water quality assessment. This device allows for results to be displayed as both percent saturation (0 to 200.0%) and concentration (0 to 20.00 ppm), featuring adjustable altitude and salinity compensation to ensure maximum accuracy across any ecosystem. Its robust design includes autocalibration functions, data hold, and an internal memory for 25 sets of readings, allowing professionals to collect critical data efficiently and securely in challenging natural environments.

Key Features

• Dual Oxygen Measurement: Displays oxygen levels as % saturation or concentration (ppm/mg/L) with high resolution.
• Adjustable Environmental Compensation: Altitude adjustment up to 20,000 feet and salinity up to 50 ppt for accurate readings regardless of geography.
• Integrated Memory: Stores up to 25 data sets with dissolved oxygen and temperature readings for later analysis.
• Automated Functions: Features autocalibration on startup, automatic shutoff, and data hold to optimize professional workflow.
• Extended Reach Versatility: Compatible with optional 1m or 5m extension cables for sampling in hard-to-reach locations.

• Specifications
• In the Box
• Optional Items
• Documents

• Dissolved Oxygen (Saturation Mode)	0 to 200.0%
  Resolution (Saturation)	0.1%
  Accuracy (Saturation)	±2% FS
  Dissolved Oxygen (Concentration Mode)	0 to 20.00 ppm (mg/L)
  Resolution (Concentration)	0.01 ppm (mg/L)
  Accuracy (Concentration)	0.4 ppm (mg/L)
  Temperature Range	32 to 122°F (0 to 50°C)
  Temperature Resolution	0.1°F/°C
  Temperature Accuracy	±1.8°F (±1°C)
  Altitude Compensation	0 to 20,000 ft (in 1,000 ft increments)
  Salinity Compensation	0 to 50 ppt

• • 1x TRACER PockeTester™ portable dissolved oxygen meter
  • 1x Dissolved oxygen (DO) electrode
  • 1x Sensor protective cap
  • 1x Spare membrane cap
  • 1x Electrolyte solution
  • 4x 1.5V SR44W batteries
  • 1x Neck strap (1.2 m)
  • 1x Instruction manual
• • Dissolved Oxygen Membrane Kit (6 screw membranes and solution)
  • Dissolved Oxygen Sensor Module replacement
  • Weighted base with 5 sample cups
  • Pack of 24 sample cups with lids
  • Dissolved oxygen extension cable (1 meter)
  • Dissolved oxygen extension cable (5 meters)
• • Technical Specifications (English)

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YSI ProSolo Optical Dissolved Oxygen/Temp Meters ²⁶

$ 2,293.25 USD

YSI ProSolo Dissolved Oxygen Sampling System with ODO/T Technology

The ultimate solution for water quality monitoring in nature, combining smart digital sensors with unrivaled optical precision in any environment.

The ProSolo handheld system with the ODO/T probe represents the cutting edge in dissolved oxygen measurement technology for field applications. Featuring Pro-DIGITAL technology, the device automatically recognizes connected sensors, enabling rapid deployment in rivers, lakes, aquaculture, or wastewater treatment plants. Unlike traditional sensors, its optical technology is non-consumptive, eliminating flow dependence and the need for agitation. This robust design minimizes interference from other gases and drastically reduces maintenance, providing more stable and longer-lasting calibrations for the demanding environmental researcher.

Key Features

• Advanced Optical Technology: Non-consumptive measurement provides the highest accuracy available without the need for probe movement.
• Pro-DIGITAL Interface: Automatic sensor recognition for quick, error-free setup in the field.
• Intuitive Color Display: High-visibility graphic monitor that makes reading critical data easy under any lighting condition.
• Robust Data Management: Memory capacity for over 100,000 data sets and KorDSS software for professional-grade analysis.
• Long-Lasting Battery: Up to 48 hours of continuous runtime on a single charge, ideal for extended field work days.

• Specifications
• In the Box
• Documents

• Memory	> 100,000 data sets
  Monitor	Graphic color LCD; 1.5'' x 2.5''
  Power	Rechargeable lithium-ion battery (~ 48 hours)
  Recharge Time	~ 9 hours with AC power adapter
  USB Port	Built-in Micro USB (PC connection, charging, and flash drive)
  Operating Temperature	0 to 50 °C (32 to 122 °F)
  Storage Temperature	0 to 45 °C (with battery) / 0 to 60 °C (without battery)
  Weight	567 grams (with battery)
  Languages	English, Spanish, German, French, Italian, Portuguese, and more
  Certifications	CEC, CE, RoHS, IP-67, WEEE, FCC
  Calibration	Stores up to 400 detailed calibration records

• • 1x ProSolo Optical Handheld Meter
  • 1x Optical Dissolved Oxygen and Temperature Probe (ODO/T)
  • 1x Carrying Case
  • 1x Rechargeable Lithium-ion Battery
• • User Manual (English)
  • Technical Specifications Sheet (English)

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