PR2 Profile Probe

    How to Buy
pr2-1 Zoom
pr2-2pr2-3pr2-4pr2-5

Testimonials

  • Portable, accurate soil moisture profiles to 1m depth 
  • Portable meter option for multi-site measurement
  • Uses access tubes for easy probe insertion and removal 

No other soil moisture probe system enables you to monitor your soil water profiles with such ease and flexibility. Install an access tube into the soil, insert the PR2 Profile Probe and press the HH2 [Read] button to display an instantaneous reading. Alternatively, connect the PR2 to a data logger (GP2, DL6 or DL2e) and leave the system to record soil moisture changes over time.

The PR2 Profile Probe is built around patented sensing technology which provides excellent 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 40cm or the PR2/6 measures at 6 depths down to 100cm.

The PR2 Profile Probe access tube requires an installation hole 27mm in diameter, allowing easy installation and minimal soil disturbance. Access tubes are manufactured to strict tolerances and are exceptionally strong and durable in the soil. Correct installation is essential and we recommend the use of our specially designed augering equipment.

The PR2 Profile Probe is available in two sizes to measure to a depth of 40cm or 100cm.mcl-28-04-2011-16-17-25

The PR2/4 has sensing elements at 10/20/30/40cm

The PR2/6 has sensing elements at 10/20/30/40/60 and 100cm

Complete Auger Kit

Access tube installation is vital.
Click here for information about our augering equipment

Specification

Specifications for Analogue PR2 and SDI-12  PR2
(Two separate tables below)  

 

Technical Specifications for PR2/4 and PR2/6 ANALOGUE
Measurement Volumetric soil moisture content, θV (m3.m-3 or %vol)
Range Accuracy specified from 0 to 0.4 m3.m-3, Full range is from 0.0 to 1.0 m3.m-3
 Accuracy ± 0.04 m3.m-3, 0 to 40°C  after soil specific calibration
± 0.06 m3.m-3, 0 to 40°C  with generalised soil calibration in ‘normal’ soils
 Salinity errors  Included in above figures (50 to 400 mS.m-1)
 Soil sampling volume Vertically:  ~95% sensitivity within ±50mm of upper ring of each pair Horizontally:  ~95% sensitivity within a cylinder of radius 100mm.
 Environment 0 to 40°C for full accuracy specification, –20 to 60°C full operating range. IP67 rated
 Stabilisation Full accuracy achieved within 1s from power-up.
 Power requirement Minimum: 5.5V DC with 2m cable, 7.0V with 100m.* Maximum: 15V DC PR2/4 consumption: <  80 mA PR2/6 consumption: < 120 mA
Outputs 4 (PR2/4) or 6 (PR2/6) analogue voltage outputs: ~0 to 1.0V DC corresponding to 0 – 0.6 m3m-3 (mineral calibration)
Connector M12 8-way male
Cabling Up to 100m of cabling may be attached
Construction material 25.4mm polycarbonate tube with pairs of stainless steel rings
Size / weight PR2/4 length:   750mm Weight:  0.6kg PR2/6 length: 1350mm Weight:  0.95kg

*using cables supplied by Delta-T Devices  

 

Technical Specifications for PR2/4 and PR2/6 SDI-12
Measurement Volumetric soil moisture content, θv (m3.m-3 or %vol.) or mV or permittivity.
Range Accuracy specified from 0 to 0.4 m3.m-3, Full range is from 0.0 to 1.0 m3.m-3
 Accuracy ± 0.04 m3.m-3, 0 to 40°C after soil specific calibration
± 0.06 m3.m-3, 0 to 40°C with generalised soil calibration in ‘normal’ soils
 Salinity errors Included in above figures (50 to 400 mS.m-1)
 Soil sampling volume Vertically:  ~95% sensitivity within ±50mm of upper ring of each pair Horizontally:  ~95% sensitivity within a cylinder of radius 100mm.
 Environment 0 to 40°C for full accuracy specification, –20 to 60°C full operating range. IP67 rated
 Stabilisation Full accuracy achieved within 1s from power-up.
 Power requirement 7.2 to 16 VDC 720 mW (awake), < 60mA at 12 VDC (awake), 0.4 mA at 12V (asleep)
Output SDI-12
Cable 5-core screened. Maximum length: 60m
Construction material 25.4 mm polycarbonate tube with pairs of stainless steel rings
Size / weight PR2/4 length:   750mm Weight:  0.6kg PR2/6 length: 1350mm Weight:  0.95kg

*using cables supplied by Delta-T Devices

Product Resources

Data Sheets

Case Studies

Manuals

FAQs

Regulatory Information