Definition. What it means to measure moisture independently of material density — and why that matters in process control.
Classical NIR or capacitive methods react to water content AND density simultaneously. If density varies, the reading drifts — even when moisture is constant.
Density-independent measurement reads two independent variables. Water content is extracted — independent of how much material currently sits in the sensor field.
In practice: Even with varying bulk densities, uneven fiber distribution or web sag, the sensor delivers the correct moisture value.
FAQ
Which methods are density-independent? +
True 2-parameter microwave methods such as 2-PMR. Single-parameter microwave devices are not.
Practical tip
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Three data points — material, temperature, position — are enough for a first sensor recommendation.
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