The Sling Psychrometer is a simple hygrometer which is used to measure relative humidity. Each psychrometer consists of two plastic-backed Celsius thermometers, one for dry bulb measurements and the other for wet bulb measurements, mounted on a wooden handle so they can be spun to obtain temperature readings. Includes an activity guide with relative humidity calculation table. Requires some assembly.

• Package includes 15 sling psychrometers.
• For general educational purposes.