Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale 613 or any other specific

613 or any other specific holding gear with outer thread M3

With thousands of units deployed across Australia

this advanced compass is ideal for outdoor professionals

Key Specifications:

Achromatic-aplanatic lens for superior clarity

Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale 613 or any other specificBrannan 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