| 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 |
| Depth Rating |
IP68; waterproof to 40 m (131 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) |
| Buoyancy |
Fresh water: 13.6 g (0.48 oz) negative
Salt water: 19.6 g (0.69 oz) negative |
| 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 |
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