working at home by using a computer terminal electronically linked to one's place of employment. Origin of telecommuting. 1970-1975. First recorded in 1970-75; telecommute + -ing1.
A humidity monitoring device is called a hygrometer. Hygrometers may be designed for indoor or outdoor humidity monitoring use (or both). Below is a summary of the types of hygrometers available for measuring humidity. Analog hygrometers use a moisture-sensitive material that is attached to a coil spring.
Hygrometer, instrument used in meteorological science to measure the humidity, or amount of water vapour in the air. Several major types of hygrometers are used to measure humidity. 1  Mechanical hygrometers make use of the principle that organic substances (particularly finer substances such as goldbeaterâs skin [ox gut] and human hair) contract and expand in response to the humidity. Contraction and expansion of the hair element in a mechanical hygrometer causes the spring to move the needle on the dial.