The Sling Psychrometer is a precision instrument used to measure relative humidity and dew point in the atmosphere. It consists of two thermometers: a dry-bulb and a wet-bulb thermometer mounted on a handle, allowing them to be whirled through the air to obtain accurate readings. Made from durable, high-quality materials with clear markings, this instrument is ideal for educational demonstrations, meteorological studies, and fieldwork in environmental science and weather monitoring.