KNX CO2, humidity and temperature sensor AP. The device is a combined sensor for CO2, temperature and humidity measurement (relative humidity). It is used to monitor the air quality in meeting rooms, offices, schools/kindergartens, passive or low-energy houses and living areas without controlled ventilation. The CO2 content of the air is a verifiable indicator of the ambient air quality. The higher the CO2 content, the worse the ambient air is. KNX software functions: Threshold adjustment range: 500-2550 ppm. Object Physical value: 0-9999 ppm. There are 3 independent measured value thresholds for CO2 and relative humidity and a threshold for the temperature value. An action is carried out if the thresholds are not reached or if they are exceeded: Send priority. Switching, value. Each threshold has a locking object. Power supply: bus voltage. Current consumption from bus: max. 10 mA. Ambient temperature: -5 °C-+45 °C. Measuring range, CO2: 300 - 9999 ppm. Measuring range, temperature: 0 °C-+40 °C. Measuring range, humidity: linear 20 %-100 %. Type of protection: IP 20 in accordance with DIN EN 60529. Dimensions: 74x74x31 mm. Colour: polar white.