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Digital Hygrometers. Digital hygrometer sense humidity by means of non-moving sensors whose electrical resistance is affected by moisture. The Weather Store offers a great selection of fine digital hygrometers for precisely measuring humidity. Digital hygrometers offer memory for high and low readings, don't fall out of calibration, and offer very good accuracy.
Thermo hygrometers are useful for measurements of humidity. Humidity is a representation of the concentration of water vapour in the air where the value is shown as a percent. Thermo hygrometers have sensors which measure humidity of the air and temperature of the air. Both values will be shown as a digital representation and converted into the desired unit. The result will then be shown via display or on a chart.