making ocean carbonate instruments since 1999.
SAMI-CO Ocean CO2 Sensor


  • Measures the partial pressure of carbon dioxide pCO 2 in water from 200-600 μatm (ranges above 600 are available by request)
  • Uses a highly precise and stable colorimetric reagent method
  • Provide researchers with valuable in-situ time series data
  • Depolyable to depths up to 600 meters
  • Can be deployed in the ocean or in freshwater
  • Long-term depolyments - can run for more than a year taking hourly measurements
  • Can support up to 3 external instruments such as PAR, dissolved oxygen, chlorophyll fluorometer, or CTD
  • Can support inductive modems or external loggers if required. 
  • Biofouling Package available for deployments in productive environments

SAMI-CO2 Performance Parameters

Typical calibration range* 150-700 μatm
Deployment duration ~10,000 measurements
Response time ~5 minutes
Accuracy** +/- 3 μatm
Precision <1 μatm
Long term drift <1 μatm units over 6 months
Thermistor accuracy, precision 0.1° C, +/- 0.01º C
Dimensions (housing length, diameter) 55 cm, 15.2 cm
Weight in air/seawater 7.6 kg / 1.1 kg
* Extended ranges possible, please contact us with questions.
**Based on lab calibration to NIST traceable NDIR