Mini CO2

  • Small dissolved CO2 sensor
  • Can be used where small size is essential
    and where a somewhat lower level of
    accuracy and stability are acceptable
  • Used on coral reefs and on AUV’s and gliders
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The Mini CO2™ is a compact, lightweight, plug-n-play pCO2 sensor designed for use in algae-to-biofuels, aquaculture, carbon sequestration, educational research, and for general monitoring in oceanographic applications.

The Mini CO2™ probe is designed to measure dissolved CO2 in applications involving immersion in water, oil, or water and oil mixtures.

The Mini CO2™ probe operates through rapid diffusion of gas from liquid through an oil resistant, advanced matrix interface to a non-dispersive infrared detector. The signal is compensated for both pressure and temperature.


  • Lightweight
  • Compact size
  • Low power
  • Unique antifouling protection

Physical Dimensions

  • Length: 28 cm (add 9 cm for battery pack)
  • Diameter: 5.1 cm
  • Weight: 0.5 kg in air, 0 kg in water
  • Housing: Acetal (depth rated to 600 meters), Titanium (depth rated to 6000 meters)

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

Download Data Sheet



Standard measurement ranges:

pCO2 concentration
0-2000 ppm CO2,
by volume
0-5000 ppm

0.1% of range

TDGP: 0-2 bar

pCO2: ± 2% of maximum range
TDGP: ± 1%

Equilibration time(t63): 3 minutes

Operating temperature: -2 to 50˚C

Electrical Characteristics

Input voltage:

  • 5-30 VDC (12-24 VDC for analog output)

Power consumption:

  • 0.4W (0.6 W for analog output)

Data output:

  • Digital RS-232
  • Analog 0-5 V or 4-20 mA

Data storage: 2GB (with datalogging option)

Sample rate: 1 second (user selectable with datalogger / controller)