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.
(1) Humidity is a measure of the amount of water vapor in the air. One way to represent humidity is the mixing ratio, defined as the mass of water vapor mixed with each unit mass of air. We usually express mixing ratio as the number of grams of water vapor in each kilogram of air.