



Whirling hygrometer (sling psychrometer) offering the maximum level of accuracy for the measurement of relative humidity utilising wet and dry bulb mercuryfilled thermometers.
The whirling hygrometer incorporates a water reservoir linked to the wet bulb by the means of a cotton sleeve. The thermometer tubes measure temperature over the range of 0 to +50°C enabling the % RH to be calculated utilising the chart supplied.
The dimensions of this whirling hygrometer are 11 x 45 x 220mm (plus handle).