Usage: Industrial Theory: Hygrometer 100% brand new and high quality Modern type thermometer&hygrometer Easy to read Hooking hole available with adjustable port Widely used for measurement of the temperature and humidity in house, school, office, hotel, factory, storeroom etc Specifications: Humidity measurement range: 40 to 75% RH Temperature measuring accuracy: 10 to 40 Celsius Diameter: approx 80mm Net weight: 31g Package includes: 1x Thermometer Hygrometer 1x plastic shell