Wet and Dry Thermometer - Masons, Zeal Type, Each

Details

The Mason's Hydrometer, also known as a Wet/Dry Thermometer, is comprised of two identical dual scale thermometers. One thermometer has a dry bulb, while the other bulb is kept wet via connection to a water reservoir. Relative humidity is calculated from the difference in readings of the thermometers. Dual scale ranges: -10 to 50°C; 20 to 120°F. Wall mounted. Measures 11.5" long, 3" wide, and 0.5" thick. Great for any school or home laboratory.