Which of the following instruments is used for measuring relative humidity in air?
A
Hydrometer
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B
Hygrometer
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C
Barometer
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D
Spherometer
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Solution
The correct option is B Hygrometer Hygrometer is the instrument used to measure relative humidity of air. PCE-555 is a combination digital hygrometer and digital thermometer used to measure relative humidity as well as air temperature, dew point temperature and wet bulb temperature. Unit of humidity measurement is grams per kilogram. This portable, hand held meter allows for quick and easy detection of enviromental conditions.