PM-457 WET & DRY BULB HYGROMETER

Consist of mercury in glass or spirit thermometers, clamped on
wooden/plastic frame, scales marked both in centigrade and
o o o o o o
fahrenheit -10 C to + 50 C x 1 C, 14 F to +120 F x 2 F. 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 width300 x 100 mm.Includes the chart.