YSI Professional Series Pro20i Dissolved Oxygen Instrument ²⁶

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)