πSAMI-pH - Ocean pH Sensor for moderate depth applications

 

The πSAMI-pH is based on the same technology as the larger, more expensive SAMI-pH, but is designed for use to 100 m.

  • Measures pHT (total hydrogen scale) in the marine pH range of 7-9
  • Uses a highly accurate colorimetric reagent method
  • System does not suffer from the drift that plagues most electrode based pH probes
  • Designed to provide researchers with valuable in-situ time series data near the surface - depths to 100 m.
  • 160-day deployment capability (hourly measurements, 25C)
  • Internal battery or power from buoy, drifter.

 

 

πSAMI-pH Performance Parameters

pH range  7-9
Salinity range* 25-40
Response time  3 minutes
Accuracy (based on CRM intercomparison)  +/- 0.007 pH units
Precision <0.004 pH units
Long term drift <0.002 pH units over 6 months
Thermistor accuracy, precision 0.1° C,  +/- 0.01º C
Dimensions - instrument body (length x diameter) 31 x 11.4 cm
Weight in air/water 3.8/0.9 kg
* Extended range possible, please contact us with questions.