Buy YSI Pro 20 Dissolved Oxygen Meter, Polarographic

$585.00 $555.75

The Pro20 provides everything you need in a handheld dissolved oxygen meter. Ruggedness, simplicity and reliability are the cornerstones of the instrument’s design.

The YSI Pro20 DO meter requires additional accessories such as cable and sensors.  See pricing below.  Please contact us, an Eco-Rental Solutions representative can help determine the proper configuration for your purchase.

  • 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 (20 meter cable available for rental)
  • 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
  • 3-year instrument; 2-year cable warranty
  • Groundwater
  • Wastewater
  • Aquaculture
  • Surface water

Pro20 Instrument General Specifications

Barometer Built-in barometer
Cable Lengths* 1- 4- 10- 20- 30- and 100-m lengths (special order up to 100-m)
(3.28, 13.1, 32.8, 65.6, 98 ft.)
Certifications RoHS, CE, WEEE, IP-67, 1-meter drop test
Connector MS (military spec) waterproof with bayonet lock
Data Memory 50 data sets
Dimensions 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in x 8.5 in x 2.21 in)
Languages English, Spanish, German, French
Power 2 alkaline C-cells providing 450 hours of battery life;
low battery indicator
Salinity Input Range 0-70 ppt; manual (automatically compensates for manual input value)
Warranty 3-year instrument; 2-year cable; 1-year Polarographic sensors; 6-months Galvanic sensors
Waterproof IP-67 (even with the battery cover off)
Weight with Batteries 475 grams (1.05 lbs)

Product Manual (PDF)
Quickstart Guide (PDF)
Specifications (PDF)


Item Description Purchase Price
DO/Temp 1-meter cable assembly $237.50
DO/Temp 4-meter cable assembly $251.75
DO/Temp 10-meter cable assembly $299.25
DO/Temp 20-meter cable assembly $356.25
DO/Temp 30-meter cable assembly $451.25
DO/Temp 100-meter cable assembly $712.50
Polarographic DO Sensor $171.00