ABUS AirSecure CO2 Detector ABUS CO2 detector CO2WM110 AirSecure - Measuring device for air quality, humidity and temperature in the room - with alarm and CO2 traffic light - 10-year sensor ABUS AirSecure - Don't give bad air a chance! Whether in the office, classroom or nursery - many people come together in a room, there is quickly poor air quality. Then only airing will help! The ABUS CO2 meter tells you when the CO2 content is too high. The ventilation recommendation is based on an acoustic alarm and coloured LEDs. Like a measuring light, the three colours green, yellow and red reflect the quality of the air.
eBay