SAMI-pH - Ocean pH Sensor
- 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 at depths up to 600 meters
- 234-day deployment capability (hourly measurements, 25C)
- Extra battery package allows the SAMI-pH to run for more than a year
- Can support up to 3 external instruments (e.g., PAR, dissolved oxygen, chlorophyll fluorometer, CTD)
- Supports Seabird underwater inductive modems or external loggers via RS-232
SAMI-pH Performance Parameters |
|
| pH range | 7-9 |
| Salinity range* | 25-40 |
| Response time | 3 minutes |
| Accuracy (based on CRM intercomparison) | +/- 0.003 pH units |
| Precision | <0.001 pH units |
| Long term drift | <0.001 pH units over 6 months |
| Thermistor accuracy, precision | 0.1° C, +/- 0.01º C |
| Dimensions (housing length, diameter - single battery) | 55 cm, 15.2 cm |
| Weight in air/seawater | 7.6 kg / 1.1 kg |
| * Extended range possible, please contact us with questions. | |