Model No.:WD-3, 4, 5, 8
Product Origin:China
Brand Name:Mengte
Price Terms:FOB, CFR, CIF
Payment Terms:T/T, L/C
Certification:ISO9001
Description:Wet-bulb temperature is measured using a standard mercury-in-glass thermometer, with the thermometer bulb wrapped in muslin, which is kept wet. The evaporation of water from the thermometer has a cooling effect, so the temperature indicated by the wet bulb thermometer is less than the temperature indicated by a dry-bulb (normal, unmodified) thermometer. The rate of evaporation from the wet-bulb thermometer depends on the humidity of the air - evaporation is slower when the air is already full of water vapor. For this reason, the difference in the temperatures indicated by the two thermometers gives a measure of atmospheric humidity. Special features for WD-5: 1) Student Mason's hygrometer 2) If too many of your humidity thermometers have been swung and flung into the corners of your classroom, you'll appreciate this student-proof stationary design with an unbreakable plastic chart that converts wet and dry bulb temperatures to relative humidity 3) White plastic case 4) Temperature range: 20-120°F (-5°C to +50°C) 5) Size (L x W x H): 12-1/2" x 3" x 1-1/2"