Maintain a conducive and optimal air quality (IAQ) in your house with this temperature and humidity tester. The Fluke 971 measures humidity from 5% to 95% and temperature range of -4 to 140 degrees, making it a must-have for assessing the IAQ. The tester is lightweight and easy to hold, so it's easy to take anywhere. The Fluke 971 includes a rugged holster and has a quick response sensor. It offers accurate readings and has a long life.