Complete low-cost kit
± 3% accuracy
Portable and easy to use
The SM150 Soil Moisture Kit provides an affordable and easy-to-use tool for obtaining reliable moisture measurements with minimal soil or substrate disturbance.
The kit comprises an SM150T* Soil Moisture Sensor, a dedicated HH150 Moisture Meter and a carry case. The cable and connector are watertight – an essential requirement for potentially wet environments.
The HH150 Meter displays volumetric water content (% volume). Please note that although the SM150T Sensor has a built-in temperature sensor, the HH150 Moisture Meter does not measure or display temperature.
The HH150 hand moisture meter is lightweight and is very easy to use, being a readout-only device (no data recording or PC complications). Operation is simple – just insert the SM150T into the soil or substrate and press the Read button to make a reading.
The SM150 Kit comes with substrate calibrations for perlite, coir, peat, and mineral wool, as well as soils – providing a rapid, rugged solution for checking the uniformity of growing conditions for many types of growing media.
The SM150T is easy to insert and install – its sharp pins minimise soil disturbance and preserve the original soil structure around the measurement rods.
Measurement Volumetric water content and soil temperature
Accuracy ± 0.03 m3.m-3 (3%)
With soil-specific calibration
± 0.5°C (0 to 40°C for temp sensor)
± 0.75°C (-20 to +60°C for temp sensor)
Soil moisture measurement range
Full accuracy over:
0 to 0.7 m3.m-3
Full range : 0 to 1.0 m3.m-3
50 to 500 mS.m-1
Salinity errors < 0.035 m3.m-3 from 0.05 to 0.4 m3.m-3. Can be calibrated up to 2000 mS.m-1
Temperature range Full accuracy over: 0 to 40°C
0 to 1.0 V differential
Corresponding to 0 to ~0.6 m3.m-3
Resistance 5.8Ω to 28Ω for temp sensor
5-14 V, ~18 mA for 1s
Minimum 5 V with 100 m cable
Environmental IP68 (-40 to +70°C)
~55 x 70 mm diameter
Sample volume is weighted towards soil immediately surrounding the rods
Dimensions and weight
Overall: 143 x 40 mm diameter
Rods: 51 mm x 2.5 mm diameter
Weight: 0.1 kg (exc. cable)
Individual sensors are interchangeable
Recalibration advised every 3 years (depending on use)
Soil calibrations Generalised Mineral and Organic soil calibrations are supplied
Accuracy 0.5% of full scale over 5-40 °C (±7.5mV – negligible effect on SM150 accuracy)
Resolution 0.1% of voltage reading
Battery life/standby life 2 x GP alkaline AAA/ 10000 readings/1 year
Compliance CE, FCC & ROHS