The new SMT50 now available!

The SMT50 is designed and manufactured by TRUEBNER. It is a low cost FDR soil moisture sensor.

Compact, functional and robust: The PCB board based design allows for an economic design, and the blade shape facilitates installation. The casing and cable is water sealed.

The SMT50 has a broad measurement range. It is maintenance free and frost resistant. With short response times and low disturbance by salinity it is designed for a long term observation.

Accuracy Soil volumetric water content (VWC):
Using factory calibration up to ± 3% (VWC) in mineral soils
with moderate salinity from 0 to 50% VWC
Typical ± 0.8°C
Resolution 8 bit = 0.2% volumetric water content
10 mV/°C
Range 0 to 50% volumetric water content
Temperature: -20 to +85°C
Output signals 0 - 3 V linear for volumetric water content
Startup time: 300 ms
Output resistance: 10 kOhm
Power 3.3-30 V DC, 2.7 mA
Cable length 10 m
Sensor dimensions 13.5 cm x 2.15 cm
Data logger compatibility logger capable of appropriate power excitation and suitable analog inputs