Sper Scientific* Whirling Hygrometers

The Whirling Hygrometer (or sling pyschrometer) is an established, well-known method for determining the relative humidity and dew point. Sling psychrometers allow you to obtain fast and accurate humidity readings anywhere by comparing the reading of the wet and dry bulb thermometers on the enclosed humidity chart. Eliminates the hazard of splattering mercury by using a safe and easy to read red liquid. The thermometers are recessed into a protective plastic mounting. The mounting also contains a water reservoir eliminating the need to constantly re-wet the wick. Comes with a carrying case and plastic humidity chart. 90 day warranty.
Image(s) are representative of the product group and not necessarily the individual product.