The PR2 Profile Probe provides easy and accurate soil moisture profiles. No other soil moisture probe system enables you to easily and flexibly monitor your soil water profiles. Install an access tube into the soil, insert the PR2 Profile Probe, and press the HH2 [Read] button to display an instantaneous reading, or connect the PR2 to a data logger (GP2 or DL6) and leave the system to record soil moisture changes over time.
The PR2 soil moisture probe is built around patented sensing technology, which provides unprecedented performance in all soil types, with minimal influence from either salinity or temperature. The PR2/4 model measures soil moisture at 4 depths down to 40 cm; the PR2/6 measures at 6 depths down to 100 cm. The PR2/4 has sensing elements at 10/20/30/40 cm. The PR2/6 has sensing elements at 10/20/30/40/60 and 100 cm
HH2 Meter
The HH2 is a versatile readout unit that provides an easy and convenient way to display and store readings from Profile Probes. With the HH2 and PR2 combination, a probe can be moved from access tube to access tube, enabling large amounts of soil moisture data to be collected at multiple sites.
Loggers for analogue Profile Probes
Delta-T offers a choice of two suitable data loggers. Both have dedicated PR2 Profile Probe input channels and connectors. The DL6 Data Logger can log one PR2/6 or one PR2/4 Profile Probe. The GP2 Data Logger can log up to two PR2/6s or three PR2/4s.
Applications
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-3 Full range: 0 to 1.0 m3 .m-3 |
Salinity range | 50 to 400 mS.m-1 Salinity errors included in calibration |
Temperature range | Full accuracy over: 0 to 40°C |
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 | PR2/6: length 1350 mm PR2/4: length 750 mm Both: 25.4 mm diameter |
Weight | 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. |
Brand | Delta-T Devices |
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