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:A relative humidity of 100 percent means that air is?Which of the following instrument can be used to…The instrument used to measure the relative humidity is?Which of the following instruments may be used to…An instrument used to measure relative humidity is the?