![CDATA[KNX CO2 / VOC combination sensor 55, pure white glossy. Version with 2 sensors. Integrated bus coupler. Combination sensor for measuring CO2 and mixed gas concentration (VOC), room temperature and relative humidity. Upper and lower threshold values adjustable for each measured value. Integrated room temperature controller (2-point, PI, PWM). Air quality control function adjustable as a step/PI controller for CO2 or VOC sensor. 4 step controllers with 1-bit outputs or 1-byte output with adjustable thresholds. PI controller with externally adjustable setpoint and adjustable control parameters. Air quality traffic light function adjustable to CO2 or VOC sensor with 4 color channels and adjustable 1-bit/scene/RGB or HSV output objects. Day/night function. Installation in windproof flush-mounted box with included support ring. Supply via KNX bus without auxiliary voltage. Integrated bus coupler. 3-year product guarantee.]]>