Soil Moisture Sensors

• High performance soil moisture sensor – true ±1% accuracy

With the ThetaProbe it's easy to make reliable, accurate soil moisture measurements. Simply insert the probe into the soil, connect to your data logger or meter, and within seconds you can be logging soil moisture. ThetaProbes are robust, buriable and maintenance free.

• Soil moisture AND temperature

The new SM300 achieves ±2.5% accuracy and offers outstanding performance in all soil types. The SM300 is a versatile, high quality, research grade sensor that offers convenience and cost saving by combining soil moisture and temperature measurement in a single probe.

• Easy and accurate soil moisture profiles

The PR2 uses newly patented sensing technology making it possible to measure soil moisture content profiles in a range of soil types and across a wide range of nutrient levels, including saline soil conditions. PR2 measurements are taken within precision access tubes. The Profile Probe is uniquely able to provide both portable measurements (attached to a meter) as well as long-term records when attached to a data logger.

• Soil moisture and nutrient monitoring within the root zone

The WET Sensor is unique in its ability to monitor Water content, pore water EC and Temperature directly within the soil or plant growing medium. It is an invaluable tool enabling horticultural growers to monitor and optimise the growing conditions directly within the substrate.

• Excellent accuracy in wet and irrigated soils - easy refill model available

A range of loggable, water-filled, pressure transducer tensiometers to measure soil water potential in many different soil environments. These precision, water-filled, ceramic cup tensiometers have good accuracy (±0.2kPa) over the range +100 to -160 kPa. The SWT range of tensiometers require refilling and degassing after dry periods and the SWT5 model must be protected from frost.

• Maintenance-free, wide range dielectric tensiometer -50 to -500 kPa

The Equitensiometer is an innovative sensor for measuring soil water potential (soil matric potential) based on the ML2x ThetaProbe. Being maintenance free, (i.e. no refilling, degassing or topping up required) and low power, the EQ2 can be conveniently used at remote sites. It is not harmed by frost or by long term burial.

• Readout and data storage unit for Delta-T soil moisture sensors

The HH2 is a versatile readout unit for use with Profile Probes, ThetaProbes, SM200s and WET Sensors. The HH2 can be operated with one hand for convenience in the field. Readings are displayed on the LCD and can be stored for later download to a PC. Detailed reading set-up is available if required.

The SM200 Soil Moisture Sensor has been superseded by the SM300, which measures soil temperature as well as soil moisture content. See the SM300 product page for further details.