The instrument used to measure the rate of transpiration in plants is called a/an? by Sunday | Apr 29 | Biology NECO | 0 comments A. Anemometer B. Barometer C. Hydrometer D. Photomer E. Potometer Correct Answer: Option E – Potometer Users Also Read These:An instrument used to measure relative humidity is the?Which of the following instrument can be used to…In surveying; the instrument used to measure…The instrument is used to measure?A hygrometer is an instrument used to measure?