Compact Psychrometer - The Compact Whirling Hygrometer instrument incorporates a ‘slide rule’ type calculator to determine the relative humidity percentage. The body of the instrument slides away into the handle providing complete protection when not in use.

Fitted with environmentally friendly LO-toxTM filled glass tubes.

Specifications:
Temperature Range: -5 to +50°C / 0 to 120°F
Humidity Range: -5 to +50°C
Divisions: 0.5°C or 1.0°F
Accuracy: +/-1°C