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Package Size: 12.5 x 3.1 x 1.5 inches
Measures relative humidity by comparing readings of wet bulb and dry bulb thermometers (using relative humidity tables supplied). Accuracy obtained by creating rapid air circulation around bulbs. Non-mercury red spirit filled thermometers. Range: -10 to 130 degree F (-5 to 50 degree C). Plastic molded case, plastic reservoir. Measures 4" width by 10" height.
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