YSI Pro20
The YSI Pro20 is a rugged and reliable handheld dissolved oxygen (DO) meter designed for both field and laboratory use. Built to withstand harsh environments, it features a waterproof IP-67 rated casing, military-spec connectors, and a rubber over-moulded body that can endure 1-metre drop tests—making it ideal for aquaculture, environmental monitoring, and wastewater applications.
This versatile instrument offers fast and accurate DO and temperature readings using either polarographic or galvanic sensors. The galvanic sensor allows immediate sampling without warm-up, while the polarographic sensor provides long-term durability and cost efficiency. With its One Touch Cal feature, calibration is completed in just three seconds, streamlining your workflow.
The Pro20 includes a backlit graphic display, glow-in-the-dark keypad, and compatibility with polarized sunglasses—ensuring visibility in all conditions. It stores up to 50 data sets and supports multiple cable lengths from 1 to 100 metres, allowing flexibility across various sampling sites.
User-replaceable sensors and cables reduce downtime and maintenance costs, while the internal barometer enhances measurement accuracy. With a 3-year instrument warranty and a 2-year cable warranty, the YSI Pro20 delivers dependable performance and a low total cost of ownership.
Key Features:
- User-replaceable sensors and cables
- One Touch Cal for convenient and quick calibration
- Choice of DO sensor (polarographic or galvanic) or lab BOD probe for BOD in wastewater
- Military spec connectors, IP-67 waterproof, and 1-meter drop tested
- Rubber over-molded case
- Low total cost of ownership
- Internal barometer for highest accuracy
- 95% response in 8 seconds with standard membrane
- Stores 50 data sets
- Graphic, backlit display and glow-in-the-dark keypad visible with polarized sunglasses on
- Available with 1, 4, 10, 20, 30 or 100-meter cables
- Multiple languages including English, Spanish, French, and German
- 3-year instrument warranty; 2-year cable warranty; 1-year polarographic sensor warranty; 6-month galvanic sensor warranty
Polarographic or Galvanic?
The long life of the polarographic sensor saves time, money, and reduces your overall cost. The galvanic sensor enables sampling to start immediately without a warm-up period. Regardless of sensor selection, you will receive accurate, quality data!
How to order:
Meter, cable, and sensor ordered separately.
Downloads:
YSI Pro20 Spec Sheet
