The Thies Clima 1.0450.00.010 device, known as Sling Psychrometer, is a simple and robust instrument for measuring **relative air humidity**. This tool works by rotating and creating air flow in a **centrifugal** way. There are two thermometers in this device, one for dry temperature and the other for wet temperature. By comparing these two temperatures and using psychrometric tables, the amount of air humidity can be obtained. This device is used for environments such as **meteorological stations**, **greenhouses** and **climate control systems** and helps to adjust environmental conditions for **plant growth** or **storage of sensitive goods** does