Economy Sling Psychrometer Kit, Easy to assemble kit to determine relative humidity., Pack of 15

Details

Attach the two thermometers to the end of the handle and place the moisture cloth over the wet bulb to assembleJust swing the apparatus and then read the difference in temperature between the web-bulb and dry-bulb to determine the relative humidityAfter a few minutes spinning the apparatus the user can take the temperature readings and review the psychometric chart to determine relative humidity