Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale highly visible marks that write

highly visible marks that write smoothly on Rite in the Rain paper making it perfect for note taking

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Achromatic-aplanatic lens for superior clarity

the Montana® 700 is thermal

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Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale highly visible marks that writeBrannan 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