Sling Psychrometer

This sling-type psychrometer accurately indicates percent relative humidity. Built-in slide rule calculator correlates wet and dry bulb temperature to relative humidity. Dual range (high and low temperature) scales for better resolution. Thermometers telescope into handle for protection when not in use. Built-in water reservoir holds sufficient water for several hours of testing. Designed for portability and ease of use. Replacement thermometers available.