The SM150T measures soil moisture and temperature with research-grade accuracy. It offers stable, robust and reliable performance at a great price.

Specification

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
Salinity range	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
Output	0 to 1.0 V differential Corresponding to 0 to ~0.6 m3.m-3
	Resistance 5.8Ω to 28Ω for temp sensor
Power requirement	5-14 V, ~18 mA for 1s
	Minimum 5 V with 100 m cable
Environmental	IP68 (-40 to +70°C)
Sample volume	~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)
Sensor calibrations	Individual sensors are interchangeable Recalibration advised every 3 years (depending on use)
Soil calibrations	Generalised Mineral and Organic soil calibrations are supplied

Channel science and technology has been dedicated to the teaching, scientific research and the sales, research and development of applied instruments in the fields of soil, plants, environment, hydrology, meteorology and animal physiology, ecology and environmental hydrology for many years.