JIM-GEM Non-Mercury Pocket Sling Psychrometer
This JIM-GEM Non-Mercury Pocket Sling Psychrometer is convenient, lightweight, and portable. Features two replaceable laboratory type, liquid-filled, non-mercury thermometers mounted on a flanged back. A swivel handle and chain facilitate whirling. Comes with a protective carrying case with retaining flap and slide rule. 30°F to 110°F in 1 divisions.