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Replacement Mercury Thermometer for the Weksler Pocket Sling Psychrometer in F.
Two 5 1/2” red liquid (mercury) filled lens front thermometers attached to metal back with handle for whirling. Handle folds out of way when not in use. Supplied with humidity table, wick, and pocket case. Range: 20 to 110°F in 1° divs.
Converts wet and dry blub temperature into percent of relative humidity. Durable plastic, 7-1/4" long. 20-100 degrees F. 10-100% relative humidity. Fits Fire Weather Instrument Kit (PEC SFF3090).