Hygrometer
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A hygrometer is an instrument that measures humidity, that is, how much water vapor is present in the air. Humidity measurement instruments usually rely on measurements of some other quantities, such
A hair tension dial hygrometer with a nonlinear scale.
Deluc's hair tension whalebone hygrometer (MHS Geneva)
The interior of a Stevenson screen showing a motorized psychrometer
Psychrometer probably made in Switzerland circa 1850 by Kappeller (MHS Geneva)
Humidor
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A humidor is a humidity-controlled box or room used primarily for storing cigars, cigarettes, cannabis, or pipe tobacco. Either too much or too little humidity can be harmful to tobacco products; a hu
Humidor with hygrometer and bowl of water during initial seasoning
Humidor with cigars