Specification
For Analogue PR2 and SDI-12 PR2
| Measurement | Volumetric water content |
| Accuracy | ± 0.04 m3.m-3 (4%) With soil-specific calibration |
| Soil moisture measurement range | Full accuracy over: 0 to 0.4 m3.m-3Full range : 0 to 1.0 m3.m-3 |
| Salinity range | 50 to 400 mS.m-1 |
| Salinity errors included in calibration |
| Output | (ANALOGUE) 0 to 1.0 V differential PR2/6: x6 outputs, PR2/4: x4 |
| (SDI-12) Digital |
|
| Power requirement | (ANALOGUE) 5.5-15 V, PR2/6: ~120 mA for 1s PR2/4: ~80 mA for 1s __________________________ Minimum 7.5 V with 100 m cable |
| (SDI-12) Power consumption <60 mA at 12 V DC Sleep current <2 mA at 12 V DC |
| Environmental | IP67 (when installed in access tube) |
| Sample volume | -95% sensitivity within a cylinder of diameter 200mm |
| Sample volume is weighted towards soil immediately surrounding the rods | |
| Dimensions and weight | PR2/6: length 1350 mm PR2/4: length 750 mm Both: 25.4 mm diameter PR2/6: weight 1.2 kg PR2/4: weight 0.8 kg |
| Sensor calibrations | Individual sensors are interchangeable Recalibration advised every 3 years (depending on use) |
| Soil calibrations | Generalised Mineral and Organic soil calibrations are supplied |
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