Capacitance Thickness Gauge / Displacement Gauge Frequently Asked Questions

When the ambient temperature changes, the sensors expand and contract, resulting in measurement errors. Furthermore, the fixed jigs also expand and contract, so it is necessary to consider these changes.

The effect of sensor expansion and contraction
The change in measurement values due to temperature variations of the sensor is expressed by the following equation. Note that the measurement accuracy is within the ambient temperature range of 23±2 ℃.

Effects of the expansion and contraction of fixed jigs.

The expansion and contraction of fixed jigs directly affect measurement accuracy. Please consider the thermal expansion coefficient of the materials used for the jigs and control the design of the jigs and the surrounding temperature.

(Example)
If the length of X changes by ΔX with the jig shown below, the measured thickness will be measured as ΔX thinner compared to the true value.