CO2 meter with traffic light, temperature & humidity display Good ventilation of the rooms reduces the risk of infection and promotes concentration. With the LogiLink CO2 meter, you always have a perfect overview of how the indoor air behaves and when it is time to ventilate. A concentration of <1000 ppm is hygienically safe. The German Federal Environmental Agency considers a concentration between 1000 and 2000 ppm to be critical and anything above this to be unacceptable. But with the large LCD display you can not only read the CO2 concentration. The built-in data logger also measures temperature and humidity in weekly, daily, hourly and minute intervals. https://elecena.pl/product/18370230/sc0115-co2-meter-with-traffic-light-temperature-amp-humidity-display 2021-05-06 https://elecena.pl/product/18370230/sc0115-co2-meter-with-traffic-light-temperature-amp-humidity-display 2025-12-10