Zeal Wet and Dry Bulb Hygrometer

The Zeal hygrometer contains two basic mercury thermometers, with a wet bulb and a dry bulb, respectively. The evaporation from the water of this wet bulb lowers the temperature making the display, which makes it cooler than the dry bulb. This Zeal Hygrometer can measure the humidity of wet and dry bulbs. It comes in the -8 to 50°C temperature range, -10 to 50°C measurement range, and 100 humidity range.