Brannan Sling Psychrometer (Whirling Hygrometer) Pouches Suunto's professional compasses are trusted

Suunto's professional compasses are trusted by a wide range of users needing precise directional data

moisture and abrasion while providing an extra layer of protection in demanding environments

For extended outings

Once the bird is calm and settled

Forestry & Silviculture: Conduct accurate tree height measurements

Brannan Sling Psychrometer (Whirling Hygrometer) Pouches Suunto's professional compasses are trustedBrannan 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