Extech Desktop Formaldehyde (CH2O or HCHO) Monitor

Simultaneously displays Formaldehyde concentration, Air Temperature, and Relative Humidity readings with date (Year, Month, Day) and time Visibly bright LED (green & red) and three facial icons indicate indoor CH2O warning level Audible beeping alarm default at 0.08ppm (adjustable) Designed with Electrochemical CH2O sensor Min/Max value recall function