Soil Moisture Meter, Type: 6002 A & B are a digital instrument for the measuring of soil moisture. The instrument has two probes: a moisture probe and a pointed temperature probe for the automatic temperature compensation (so it's possible to use the instrument only like a thermometer for checking the temperature in the soil or inside the fruit). The soil moisture sensor (granular matrix sensor) is an indirect, calibrated method of measuring soil water (in 6002B). It is an electrical resistance type sensor, read by the hand-held meter which converts the electric resistance reading to a calibrated reading of centibars of soil water suction.