| pH Sensor |
| | pH | mV |
| Range | 2.00 to 12.00 pH | -512 to 512 mV |
| Accuracy | ±0.10 pH units within ±10°C of temperature at calibration | ±0.20 mV |
| Resolution | 0.01 pH | 0.02 mV |
| Response Time | 1 minute typical to 90% at constant temperature in stirred water |
| Sample Ionic Strength | ≥ 100 µS/cm |
| Temperature Sensor |
| Range | -2° to 50°C (28.4° to 122°F) |
| Accuracy | ±0.2°C (±0.36°F) |
| Resolution | 0.024°C at 25°C (0.04°F at 77°F) |
| Response Time | 7 minutes typical to 90% in stirred water |
| Logger |
| Operating Range | -2° to 50°C (28.4° to 122°F) — non-freezing |
| Buoyancy | Fresh water: 13.6 g (0.48 oz) negative
Salt water: 19.6 g (0.69 oz) negative |
| Waterproof | To 40 m (131.2 ft) |
| Water Detection | Water conductivity level of 100 µS/cm or greater is necessary for reliable detection of water. Deionized water or water below 100 µS/cm may not be detected.
The water conductivity circuit may not reliably detect water that has frozen around the electrodes, i.e. below 0°C (32°F). |
| Radio Power | 1 mW (0 dBm) |
| Transmission Range | Approximately 30.5 m (100 ft) line-of-sight in air |
| Wireless Data Standard | Bluetooth Low Energy (Bluetooth Smart) |
| Logging Rate | 1 second to 18 hours |
| Logging Modes | Fixed interval (normal, statistics) or burst |
| Memory Modes | Wrap when full or stop when full |
| Start Modes | Immediate, push button, date & time, or next interval |
| Stop Modes | When memory is full, push button, date & time, or after a set logging period |
| Time Accuracy | ±1 minute per month 0° to 50°C (32° to 122°F) |
| Battery Type | One AA 1.5 Volt, user-replaceable |
| Battery Life | 1 year typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always On selected in software.
2 years typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Off Water Detect enabled in software.
3 years typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off selected in software.
Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life. |
| pH Electrode Typical Minimum Life | 6 months in sample with ionic strength ≥ 100 µS/cm |
| Memory | 152 KB (43,300 measurements, maximum) |
| Full Memory Download Time | Approximately 60 seconds; may take longer the farther the mobile device is from the logger |
| Dimensions | 22.86 x 4.27 cm (9.0 x 1.68 inches); mounting hole 0.64 cm (0.25 inches) |
| Weight | 268.2 g (9.46 oz) |
| Wetted Materials | Logger: PVC housing and sensor end cap, polycarbonate closure caps and mounting end cap with a TPE switch
pH electrode: plastic-bodied with Pellon® junctions and gel electrolyte, glass pH sensor bulb |
| Environmental Rating | IP68 |
