Error Analysis of High-moisture Maize Moisture Measurement with PM-8188 Grain Moisture Tester

PM-8188 type capacitance grain moisture tester was used to detect the moisture of twenty-four maize hybrids in the period of harvest time and the period when the grain were naturally fully dehydrated, the results were compared with the results of grain weight change, and the changes of measurement errors in high moisture levels were discussed briefly. The results showed that the measurement error reached its minimum by the measured value of 26.2. The measured value was larger than the true value when below 26.2, but smaller when exceeded. And the measurement error increased with the deviation from 26.2.