Hygrometer is an instrument used for measuring the amount of humidity in the atmosphere. It has two basic mercury thermometers, comprising of a wet bulb & dry bulb respectively. Evaporation from the water on the wet bulb drops down the temperature which makes is display, causing it to lower temperature as compared to dry bulb.
100% Relative Humidity
Height 320mm, Width 40mm, Length 80mm.
Yellow Colour Or Plastic Body