The formaldehyde meter from PCE Instruments is a state-of-the-art device for monitoring air quality in various indoor environments, including homes, offices, schools and public facilities. It enables the simultaneous measurement of formaldehyde (HCHO), volatile organic compounds (TVOC), ambient temperature and relative humidity. With a 2.8-inch colour display, all measured values are shown in real time and the air quality is visually assessed in three levels: green for "good", yellow for "poor" and red for "very poor". The device is equipped with an audible alarm function that is activated when set threshold values are exceeded. It also offers extensive data storage functions that allow the storage intervals and collection points to be customised. User-friendliness is supported by additional functions such as a real-time clock, a battery level indicator and adjustable screen brightness. This measuring device is therefore an indispensable tool for anyone who values healthy indoor air quality. Real-time measurement of formaldehyde, TVOC, temperature and humidity. Visual air quality assessment in three levels. Acoustic alarm function with adjustable threshold values. Memory for up to 200 measuring points on 5 pages. Adjustable measuring rate and automatic switch-off time.