Highly accurate yet easy to use: With the ML3 ThetaProbe Soil Moisture Sensor it’s easy to make reliable, accurate soil moisture measurements. Simply insert the soil moisture probe into the soil, connect to your data logger or readout unit, provide 5-14 V DC at 18 mA, and within seconds you can be logging soil moisture. The ML3 ThetaProbe is robust, buriable and maintenance free (environmentally protected to IP68). It can be easily installed at depth into augered holes using the optional extension tubes. The ML3’s excellent salinity response has been characterised at EC values up to 2000 mS.m-1.