New Soil Moisture and Temperature Sensor from Delta-T Devices – the SM150T

The new SM150T Sensor is ideal for measuring moisture content and temperature in soils and substrates. It has a wide range of applications across science, horticulture and agriculture, and is a reliable and cost-effective sensor for system integrators, who appreciate its ease of installation and simple interface (0 – 1 V DC output).

The SM150T’s advanced patented electronics and high specification construction produce a dependable sensor with exceptional salinity and temperature stability. It’s a research-grade sensor, engineered to withstand long term burial – the sensor, connectors and cable are all environmentally protected to IP68 – and it comes with a 5 year warranty. The SM150T provides moisture accuracy of ± 3% (after soil specific calibration) and temperature accuracy of ± 0.5°C.


The SM150T is a dual purpose sensor – it can be used portably (with a readout meter) for instant moisture readings, or left installed in the soil connected to a logger – to provide moisture and temperature data. When installed it can be logged by any Delta-T Devices data logger and by many loggers from other manufacturers.
With a length of only 143 mm (rods 51 mm), the SM150T can be easily installed in grow-bags and plant pots. Its accurate and stable measurement (± 3% for 0-70% VWC range) and low power (18mA for 1 second) make it an excellent choice for irrigation system integration.

For portable applications the SM150T is available in SM150 Kit form, complete with readout meter and carry case. The kit is simple to use and rugged, making it easy to check the uniformity of growing conditions in substrates. The kit includes substrate calibrations for perlite, coir, peat, and mineral wool, as well as soils.

The SM150T is easy to insert and install – its sharp pins minimise soil disturbance, preserving the original soil structure around the measurement rods. For burial at depth the cylindrical shape facilitates installation in augered holes.

The SM150T replaces the older SM300 and SM150 Sensors, combining their strengths – and offering great value.

Soil Science applications for the SM150T
Horticultural applications for the SM150T

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