Protimeter moisture and temperature probe includes nine calibrations are pre-programmed into the Grainmaster i. The probe can be used with the Grainmaster i for checking the moisture and temperature levels of stored grain. This probe is used to monitor the condition of stored grain quickly; it is not a substitute for moisture measurements taken from ground samples. Ground sample measurements are more reliable than moisture probe measurements. Be sure that the instrument's internal grain cell should be empty while using the external moisture probe. Avoid contact with the centre pad of the cell while using the grain probe.
The spiral wound electrodes (that make the moisture measurement) should be wiped clean with a cloth at regular intervals to prevent the accumulation of dust that may attract moisture and give an erroneous reading. A temperature sensor is mounted in the tip of the probe. This is easily damaged if the probe tip is rammed against hard surfaces. Always replace the protective cap when the Moisture and Temperature Probe is not in use. Note: the user adjustments may be made in the same manner as for the internal grain cell, these are stored separately from the later.