electrical hygrometer
Quick Summary
An electrical hygrometer is a meteorological instrument used to measure humidity, or the amount of water vapor in the air. It functions by detecting changes in the electrical resistance of a material, such as a salt film or a semiconductor device, as the humidity levels fluctuate. This is one of several types of hygrometers, which also include mechanical devices that use organic substances like hair, and dew-point hygrometers that measure the temperature at which condensation forms. Another common type is the psychrometer, which uses two thermometers (one wet-bulb and one dry-bulb) to determine humidity based on the rate of evaporation.123
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