Wall Thermometer, Wet & Dry Bulb, 1 Each

The United Scientific® Wall Thermometer, Wet & Dry Bulb by United Scientific measures relative humidity using two identical thermometers, one with a wicking cloth fed by a water reservoir. Both are graduated -10 to +50°C in 1°C divisions and 14 to 122°F in 2°F divisions, and a Celsius humidity table is included. Schools use it for weather and evaporative cooling lessons and for monitoring indoor humidity.