Whirling hygrometers, also known as sling psychrometers, employ the “wet” and “dry” bulb principle to determine % RH. They are designed to be rotated, by hand, to provide adequate and consistent ventilation of the bulbs. The Compact Whirling Hygrometer instrument incorporates a ‘slide rule’ type calculator to determine the % RH. The body of the instrument slides away into the handle providing complete protection when not in use.
Available with environmentally friendly LO-toxTM filling.

Product Specifications
Temperature Range: -5 to +50°C
Humidity Range: -5 to +50°C
Divisions: 0.5
Accuracy: +/-1°C
Casing Material: ABS
Product Weight: 73g
Product Dimensions: (closed) – 36 x 210 x 16mm