• Typically for use in the oceans,
    but can also be used in lakes and rivers
  • Finished first among submersible sensors
    in October 2009 Alliance for Coastal
  • Unique patented antifouling membrane
    equilibrator design
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The CO2-Pro™ is a lightweight, compact, and versatile sensor for measuring the partial pressure of CO2 in water. It is designed for in-situ pCO2 measurement on shipboard in underway-mode, in the laboratory and on moorings, profilers and gliders.

The CO2-Pro™ is a versatile pCO2 instrument featuring the Pro-Oceanus patented pump-driven tubular gas transfer interface. This revolutionary interface provides rapid equilibration of surrounding water with a NDIR detector.

Long-term stability is achieved with the CO2-Pro™ sensor through an automatic zero compensation circuit that removes all CO2 from the detector prior to a zero reference measurement. The CO2-Pro™ dissolved CO2 instrument comes with plug-n-play ease of operation, and a range of data handling options including storage onboard, and continuous or pollable output.


  • High precision and accuracy
  • Low power and lightweight
  • Unique patented antifouling protection
  • Onboard logging available
  • Atmosphere measurement option

Physical Dimensions

  • Length: 33 cm (add 10 cm for connectors)
  • Diameter: 19 cm
  • Weight: 5.5 kg in air, 0.4 kg in water
  • Housing: Acetal housing (depth rated to 110 meters)

All of our instruments are covered by a ONE-YEAR LIMITED WARRANTY

Download Data Sheet



  • 0.5%

Zero drift: Automatic Zero Compensation

Equilibration time (t63): ~ 2.5 min
(with water pump)

Measurement range:
0-600 µatm
0-1000 µatm
0-2000 µatm
other custom ranges are available

Temperature ranges:
Arctic version: -2 to 15ºC
Standard: 0 to 30ºC
Tropical version: 15 to 40ºC

Electrical Characteristics
Input voltage:

  • 12-18 V DC

Power consumption:

  • 0.4 A (includes water pump)
  • 1.0 A during warmup

Data storage: 2 Gb available with logger/ controller option

Data output: RS-232 serial output, ASCII format (other outputs available)

Sample rate: 1.6 seconds (user selectable with datalogger / controller)