The SMT50 is a reliable mid-range sensor with industry leading robustness and long term performance. It is especially suited for smart garden and simple irrigation control applications in agriculture.

For ease of operation the SMT50 is availble with a 0- 3 V analog voltage output for moisture and includes an additional temperature sensor.


Optimized for irrigation control


Easy installation and use


Best in class price performance ratio

First slide
Fibre glass reinforced blade with embedded electrodes for moisture sensing
Epoxy potted electronic circuit with temperature sensor
Microbe resistant polyurethane cable for longest service life


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


8 bit = 0.2% volumetric water content 10 mV/°C


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


3.3-30 V DC, 2.7 mA

Cable length

10 m

Sensor dimensions

ca. 13.5 cm x 2.15 cm

Data logger compatibility

Logger capable of appropriate power excitation and suitable analog inputs