Meter Group EC-5 bare wire high-frequency soil moisture sensor, 5cm

Measurement : Volumetric water content
Range : 0-100% VWC
Accuracy : ±3% VWC, Typical mineral soils up to 8 dS/m
                 Rockwool - ±3% VWC, 0.5 to 8 dS/m
                 Potting Soil - ±3% VWC, 3 to 14 dS/m