The Brannan Heavy Duty Whirling Hygrometer, also known as a sling psychrometer, is designed to determine relative humidity (%RH) by comparing readings from wet and dry bulb thermometers. By rotating the instrument manually using its foldable handle, adequate airflow is generated across the bulbs, enabling precise and stable humidity measurements in a wide range of environments.
The hygrometer features environmentally friendly, blue spirit filled thermometer tubes housed in a robust structure suitable for repeated professional use. Its compact folding handle design makes it easy to operate and store, while ensuring consistent rotation for dependable results during field inspections or laboratory checks.
Supplied with a protective pouch, calculator chart, and two replacement wicks, this hygrometer is ready for immediate use and long term service. With a temperature range of -5°C to +50°C and an accuracy of ±1°C, it is ideal for HVAC inspections, environmental monitoring, and industrial applications.
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