Definitions for "Sling psychrometer"
Psychrometer to which a small chain or rotary handle is attached so that the observer can rotate the instrument rapidly to properly ventilate the thermometer bulbs.
A device for determining relative humidity that consists of a wet and dry bulb thermometer mounted in a frame that can be whirled about, usually by means of a handle and short piece of chain or wire rope attached to the upper end of the frame.
A device consisting of two thermometers, one of which has a dry bulb (normal thermometer) and the other of which has a bulb that is kept wet (by placing a wet fabric sleeve over the reservoir at the base of the thermometer). The difference between the wet and dry bulb temperatures is used to calculate relative humidity.