Which of the following is used to measure relative humidity? by Sunday | May 19 | Physics WAEC | 0 comments A. hydrometer B. barometer C. hypsometer D. hygrometer Correct Answer: Option D D. hygrometer Users Also Read These:The instrument used for measuring relative humidity…Relative humidity can be measured with a/an?A relative humidity of 100 percent means that air is?The mass of water vapour in a given volume of air is…The instrument used to measure the relative humidity is?