TH2O Portable Soil Moisture Probe

TH₂O Portable Soil Moisture Probe

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HH2 Manual

ML2 Manual

What is it?
The TH₂O is a new way to measure volumetric soil moisture content. It combines ease of use and accuracy with low cost, to give growers, land managers and engineers immediate precise soil moisture data.The probe is reliable even in saline soils and its compact size means minimal substrate disturbance.

How does it work?
The sensor sends a microwave signal and analyzes a reflected signal to measure the dieletric constant (theta) of the soil. The dielectric reading is then converted to volumetric water content (±2% accuracy). The battery-powered hand held readout provides instantaneous readings for mineral or organic soils.

How do you use it?
The TH₂O probe is inserted into the soil and when the readout button is pushed the LCD shows the soil water content as a decimal value.

You may also install access tubes and take soil moisture reading from deep within the soil profile.

Features

Sealed, waterproof probe, factory calibrated
Unaffected by salinity or temperature
Inserts with minimal disturbance - (4) 1/8” prongs
Operates in the range of 0-60% water content
Displays in volumetric water content and deficit
Stores up to 1100 time-stamped readings, accessed by PC
Readings include sample number, plot identification
number, and a sensor number

Specifications

ML2x Sensor Specifications
Accuracy
± 2% soil moisture (±0.02 m³/m³) with factory calibration

Power Input
5-15 VDC at 19 mA Output: 0-1 VDC for: 0-50%

Rod Dimensions
2.375" (60 mm),

Overall length
8" including pins

Extensions
Choice of 50 cm or 100 cm (may be joined) For convenient walking about with probes. Fits into 2 in ID access tubes to deeper vadose zone.

Patents
EUR 963703190.1, GB 9609372.9 USA 08\706675 Pend.

HH2 Readout Specifications
Display
16 x 2 character LCD

Soil moisture ranges
zero to saturation. 0-1V on voltage range

Battery life
Typically: 6500 readings for ThetaProbe type ML2x: 4500 readings fore Profile Probe type PR2/6

Size/Weight
150 x 80 40mm, 450g

Battery
9V Alkaline Cell (PP3)