Hygrometer W70

With this 2-in-1 hygrometer and thermometer, consumers can measure the relative humidity as well as the air temperature in the different rooms and thus determine when they should turn on a humidifier. A valuable measuring instrument for the optimal use of a humidifier. Measures relative humidity as well as air temperature for better comfort in living spaces. Helps keep indoor relative humidity between 40-60%, which is the optimal range to reduce flu virus survival on surfaces and in the air*. Temperature display in Celsius & Fahrenheit. Display of relative humidity (% RH). * A study conducted by Environmental Health and Engineering (Environmental Health 2010) found that a constant indoor relative humidity of 40-60% as opposed to lower levels reduces the survival time of flu viruses on surfaces and in the air.