Soil Moisture Sensor Designed for Durability and Accuracy

Soil Moisture Sensor Designed for Durability and Accuracy

Dynamax-SM150-KitDynamax recently introduced its new SM150T soil moisture sensor. The sensor features advanced, patented electronics and a tough build to provide strong salinity and temperature stability.

The SM150T is engineered to withstand long-term burial — the sensor, connectors, and cable are all environmentally protected to IP68. It offers moisture accuracy of ±3% (after soil specific calibration) and is a dual purpose probe, meaning it can be used portably for instant moisture readings, or left installed in the soil connected to a data logger, to provide long-term moisture and temperature data.



The SM150T is easy to insert and install. Its sharp pins minimize soil disturbance and preserve the original soil structure around the measurement rods. For burial at depth, the cylindrical shape facilitates installation in augered holes. The threaded base of the sensor can be connected to optional extension tubes, which assist with placement and removal.


The SM150T comes complete with general calibrations for mineral and organic soils. A two-point soil-specific calibration can be performed for greater accuracy if required.

Applications in the Greenhouse

With a length of only 5.6 inches (143 mm), the SM150T can be installed in grow bags and plant pots. For portable use, the SM150T Kit provides a simple, rugged solution to checking the uniformity of growing conditions across many types of growing media. Substrate calibrations include perlite, coir, peat, and mineral wool, as well as soils.