Brannan Sling Psychrometer (Whirling Hygrometer) Pouches For extended outings

For extended outings

Suspension: Swivelable holder bow and hook

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Brannan Sling Psychrometer (Whirling Hygrometer) Pouches For extended outingsBrannan Sling Psychrometer (Whirling Hygrometer) The Brannan Sling Psychrometer (Whirling Hygrometer) is a manual instrument used to measure relative humidity using the wet and dry bulb principle. It is designed with a rotating handle that allows the thermometer bulbs to be whirled through the air, ensuring accurate and consistent airflow for reliable readings. The unit is filled with a spirit based liquid and is supplied as a complete kit in a