Extech RH250W Hygro-Thermometer is a device designed to measure both humidity and temperature levels in a given environment. It features a built-in sensor for measuring relative humidity levels with an accuracy of ±5% RH and a temperature range of 14 to 140°F (-10 to 60°C)  with an accuracy of ±1°C.
Applications:: Cleanroom air humidity, workplace inspection, storage area, inspection, building health, building comfort, HVAC equipment check, appliance testing, research and development, and engineering and design.