Casella Whirling Hygrometer (Spirit Filled)

Product Code - M105351

Casella Whirling Hygrometer (Spirit Filled)

Please note: this product is now obsolete.

The Zeal whirling hygrometer from Casella is instrumentation used to measure humidity in the air.  This particular version of the hygrometer is spirit filled, has a simple slide rule and wick and can measure temperature from -5 to +50° C.  Held in a slotted frame, the wet and dry bulb thermometer is whirled at speed around the handle.  This is done to give a high and reasonably constant rate of airflow. 

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