Anchor Farm, Trent, Dorset
Tel 01935 850750

Practical Pointers for the Maintenance of Grain Moisture Meters

Thursday 19th September 2013

Grain Moisture Meter and Probe Maintenance

Routine maintenance is important for good practice and to comply with farm assurance protocols.

Return to the manufacturer for a full service

  • Most thorough,covering all aspects of meter
  • Cost £50 plus
  • Checked over range of moistures

Attend a moisture meter clinic

  • Complies with assurance schemes
  • Only assesses measurement
  • Less thorough than manufacturer

Test against a buyer's sample

  • Improved agreement with buyer
  • Limited range of test samples

Getting the Best out of your Moisture Meter

Remember, crop moisture measurement is not an exact science.

When checking a moisture meter/probe it is important to:

On-farm adjustments are not recommended. DIY adjustments usually increase errors.

Preparing Samples

To minimise errors a well mixed, representative sample should be taken. Care should be taken to avoid contaminants, e.g. soil or screenings.

The Effect of Temperature

Allow meter and grain sample to achieve the same temperature – usually a few minutes. This is particularly important when meter is stored in a cooler/warmer environment than the grain.

Allow a longer equilibrium period when using a probe in grain recently placed in store.

Loading Capacitance Meters

Use loading devices supplied. It is very important to fill meters with the specified quantities of grain and to keep the meters level.

Grinding Samples for Resistance Meters

Clean and lubricate compressor plunger threads daily. Check the grinder regularly for wear. If a specific grinder is not supplied with the meter, crack grains into two or three pieces. Acceptable results can be achieved with a coffee grinder, but avoid grinding too finely as moisture may be reduced.

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