In humidity measurement and especially in calibration, it is essential that the temperature of the probe and the measurement environment are the same. Even a small temperature difference between the environment and the probe causes an error.
A temperature difference of a few degrees can also cause water to condense on the sensor surface. The HUMICAP® sensor starts to function normally as soon as the water has evaporated. If the condensed water is contaminated, the life span of the probe may shorten and calibration may change.