WET & DRY BULB HYGROMETER

Consist of mercury in glass or spirit thermometers, clamped on wooden/plastic frame, scales marked both in centigrade and fahrenheit -10 oC to + 50 oC x 1 oC, 14 oF to +120 oF x 2 oF. These thermometers are marked Dry and Wet. Bulb of Wet thermometers covered by muslin wick connected to a plastic water reservoir to keep it moist. Dimensions – length x width 300 x 100 mm. Includes the chart.