Brannan Sling Psychrometer (Whirling Hygrometer) Pouches Forestry & Silviculture: Conduct accurate

Forestry & Silviculture: Conduct accurate tree height measurements

Suspension: Swivelable holder bow and hook

Once the bird is calm and settled

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Brannan Sling Psychrometer (Whirling Hygrometer) Pouches Forestry & Silviculture: Conduct accurateBrannan 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