Science Source Stock Photo - Thermohydrographs measure temperature & humidity

Thermohydrographs measure temperature & humidity

Description: Thermohydrographs. Two designs of thermohydrographs, instruments for making and recording measurements of the temperature and relative humidity of the air. It contains a thermometer and a hygrometer. The thermometer leaves a trace on the upper portion of the paper chart; this upper portion is calibrated in units of degrees Fahrenheit (F). The hygrometer leaves a trace on the lower half; relative humidity is measured as the ratio of water vapor in the air to that in air which is saturated with water vapor at the same temperature.

Credit:

Sam Ogden/Science Source

Unique identifier: SS294367

Legacy Identifier: SB6913

Type: Image

Size: 3189px × 2897px (~26 MB)

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