Whirling hygrometers, also known as sling psychrometers, employ the “wet” and “dry” bulb principle to determine % Relative Humidity. They are designed to be rotated,
by hand, to provide adequate and consistent ventilation of the bulbs. This instrument has a folding handle and is supplied with a chart to calculate %RH and a protective canvas carry case.

Product Specifications
Temperature Range: -5 to +50°C
Divisions: 0.5°C
Accuracy: +/-1°C
Tube Filling: Spirit
Product Weight: 206g
Product Dimensions: (closed handle) - 82 x 232 x 30mm