Hygrograph vs. Hygrometer

Hygrographnoun

Any of several forms of automated hygrometer that record humidity.

Hygrographnoun

An instrument for recording automatically the variations of the humidity of the atmosphere.

Hygrometernoun

(meteorology) An instrument that measures the humidity of the air or other gases, especially the relative humidity.

Hygrometernoun

An instrument for measuring the degree of moisture of the atmosphere.

Hygrometernoun

measuring instrument for measuring the relative humidity of the atmosphere

Hygrometer

A hygrometer is an instrument used to measure the amount of water vapor in air, in soil, or in confined spaces. Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, a mechanical or electrical change in a substance as moisture is absorbed.