The most accurate way to measure Relative Humidity (RH%)!
Two 5½” red spirirt filled thermometers are attached to metal back for whirling. To obtain a RH%, simply wet the wick of the wet bulb thermometer, whirl the psychrometer, and view both thermometer readings. Then, using the chart provided, determine the RH% (the optional slide rule makes this easier).
Features:
- Handle folds out of way when not in use
- Supplied with humidity table, wick, & case
Specifications:
- Range 20°F to 110°F in 1°F divisions
- Accuracy: ±1% scale