PR2 Profile Probe Delta T Devices

The PR2 Profile Probe is available in two sizes to measure to a depth of 40 cm or 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

Data Logging

Profile Probes are available with analogue or SDI-12 outputs.

For the analogue version, order PR2/4 or  PR2/6.

For the SDI-12 interface version, order PR2/4-SDI-12 or PR2/6-SDI-12.

Please note that analogue and SDI‐12 probes cannot be mixed on the same cable system

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-3

Full range : 0 to 1.0 m3.m-3

Salinity range

50 to 400 mS.m-1

Salinity errors included in calibration

Temp range

Full accuracy over : 0 to 40 °C

Output

( ANALOGUE )

0 to 1.0 V differential

PR2/6 : x 6 outputs, PR2/4 : x 4

( 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 200 mm

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

Accessories

Hardware

HH2 Moisture Meter – Readout Unit

Main components and software

PR-CB2 Carrying bag for PR2

Installation accessories

PR2 Profile Probe Installation

SPA1 Access Tube Spacer – 50 mm Long Tube

SM-AUG-100 Spiral Auger, 45 mm diameter, length 1.2 m.

ATL1 Access tube – Long – For Installation in Augered Hole

ATS1 Access tube – Short – For Installation in Augered Hole

Cables and networks

PRC/M12-05 5 m Cable PR2 to DL6

PRC/w-05 5 m Cable PR2 to Bare Wire

PRC/d-HH2 1.5 m cable PR2 to HH2

EXT/8W-05 5 m extension cable

EXT/8W-10 10 m extension cable

EXT/8W-25 25 m extension cable

Spares and consumables

PR2 Profile Probe – Spares Kit