Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale this advanced compass is ideal

this advanced compass is ideal for outdoor professionals

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

Trusted by Professionals:

the hue (colour) and the chroma (degree of saturation) for that colour

Sized at 152 x 228mm (6" × 9")

Brannan Sling Psychrometer (Whirling Hygrometer) Type_Olive Scale this advanced compass is idealBrannan 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