YSI Pro20 Dissolved Oxygen Meter

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

  • Features
  • Specifications
  • Ordering Guide

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.

Additional features include:

  • 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
  • 3-year instrument; 2-year cable warranty

Lab or field - the Pro20 is ready for whatever you need when it comes to oxygen meters.

When ordering the YSI Pro20 you must order the instrument, cable, and dissolved oxygen probe separately, allowing you to choose the system that best fits your application.

If you're interested in learning more about optical dissolved oxygen technology and the YSI ProODO optical DO instrument please visit the ProODO page.

Please visit our dissolved oxygen parameter page to learn about all things DO and BOD related.

You can also download The Dissolved Oxygen Handbook covering all things DO related from technologies, to maintenance and calibrations, and acquiring the best data.

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)
* Special order cable lengths up to 100-meters in 10-meter increments available.

Pro20 System Specifications (Instrument with Cable & Probe)

Sensor Type Range Accuracy Resolution
Dissolved Oxygen (%) Polarographic or Galvanic 0 to 500% air saturation 0 to 200% air saturation, ± 2% of the reading or  ±2% air saturation,      whichever is greater; 200 to 500% air saturation, ± 6% of the reading 0.1% or 1% air saturation (user selectable)
Dissolved Oxygen (mg/L) Polarographic or Galvanic 0 to 50 mg/L 0 to 20 mg/L, ± 2% of the reading or  ±0.2 mg/L, whichever is greater;   20 to 50 mg/L, ± 6% of the reading 0.01 or 0.1 mg/L (user selectable)
Temperature -5 to 55°C
(0 to 45°C; DO compensation range for mg/L )
±0.2°C (±0.3°C cables over 45-meters) 0.1°C
Barometer 400 to 999.9 mmHg ± 5 mm Hg within ± 5°C temperature range from calibration point 0.1 mm Hg

Ordering Guide

Item # Description
6050020 Pro20 Handheld instrument
60520-1 1-m cable for DO/temp
60520-4 4-m cable for DO/temp (includes cable management kit)
60520-10 10-m cable for DO/temp (includes cable management kit)
60520-20 20-m cable for DO/temp (includes cable management kit)
60520-30 30-m cable for DO/temp (includes cable management kit)
60520-100 100-m cable for DO/temp
605780 Self-stirring BOD probe with 2-m (6 ft.) cable included
605202 Galvanic Sensor for any cable
605203 Polarographic Sensor for any cable

 

Ordering Guide for Pro20 Kits

Item # Description Included in Kit
603168 BOD Kit, US Pro20 meter, ProBOD self-stirring BOD probe, Lab Dock , US power supply (073035)
603222 BOD Kit, INT Pro20 meter, ProBOD self-stirring BOD probe, Lab Dock, International power supply (073047)
603169 Pol DO Lab/Field, 4-m Pro20 meter, ProBOD self-stirring BOD probe, 4-meter field cable with polarographic DO probe, Lab Dock, US power supply (073035), soft-sided carrying case (603162)
603170 Gal DO, 4-m Pro20 meter, 4-meter field cable with galvanic DO probe, soft-sided carrying case (603162)
603171 Pol DO, 4-m Pro20 meter, 4-meter field cable with polarographic DO probe, soft-sided carrying case (603162)
603172 Gal DO, 10-m Pro20 meter, 10-meter field cable with galvanic DO probe, soft-sided carrying case (603162)
603173 Pol DO, 10-m Pro20 meter, 10-meter field cable with polarographic DO probe, soft-sided carrying case (603162)

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