A hygrometer is an instrument used to measure the amount of humidity and water
vapour in the ... There is usually a metal needle on the front of the gauge that will
change where it points to. ... Relative humidity (RH) is computed from the ambient
temperature, shown by the dry-bulb thermometer and the difference in ...
Relative Humidity Meters
In our webpages, you will find relative humidity meters that can measure relative
air humidity, or combined devices that can also measure temperature.