Current Bid:
$7.00
Minimum Bid:
Auction has ended.
Buyer's Premium: 13% will be added to the final price. A 3% cash discount is applied to the invoice total when paying in cash.
Measures humidity. Water is poured in the little reservoir in the bottom to wet one thermometer. Then the scale is slid to determine the temperature difference between the wet and dry thermometers. The scale at top is then read to determine relative humidity. Includes original box and directions.