HVAC Room Transmitter and Switches for CO2, Relative Humidity and Temperature HLX80 series set new standards in CO measurements for HVAC. 2 The transmitters resp. switches combine CO2, relative humidity (RH) and temperature (T) measurement in one modern and userfriendly housing.The basic HLX80 version for CO 2 and T can be easily extended with a RH plug-in module. The CO2 measerument is based on the infrared principle. A patented auto-calibration procedure compensates for the aging of the infrared source and ensures outstanding long term stability. HLX80 provides analogue outputs (in V or mA). The optional display indicates sequentially the actual measuring data. As one more option a switching output with adjustable switching point and hysteresis is HLX80 available. A wide variety of models ensures an optimal adjustment for customised requirements.Two different housing designs ensure professional appearance according to regional standards. Typical Applications building management for residential and office areas ventilation control CO2 / RH / T measurement in one device RH output with plug-in module analogue or switching output modern design optional display easiest installation long-term stable Technical Data Measuring values CO2 Measurement principle Sensor Working range Accuracy at 25°C (77°F) and 1013mbar Response time t Temperature dependence Long term stability Sample rate Non-Dispersive Infrared Technology (NDIR) Dual Source Infrared System 0...2000 / 5000ppm 0...2000ppm: < ± (50ppm +2% of measuring value) 0...5000ppm: < ± (50ppm +3% of measuring value) < 195s typ. 2ppm CO /°C typ. 20ppm / year approx. 15s Relative Humidity version with current output 4 - 20mA: ±0.7°C Measurement principle Sensor element Working range Accuracy at 20°C (68°F) please see ordering guide Temperature (passive output) Analogue Output Switching Output Max. switching voltage Max. switching load Min. switching load Contact material Supply voltage Current consumption

Housing / Prodection class Display Electrical connection Electromagnetic compatibility PC / IP30 LC display: alternating CO (ppm) / T (°C or °F) / RH (% RH) screw terminals max. 1.5 mm (AWG16) EN61326-1 FCC Part 15 EN61326-2-3 ICES-003 ClassB 0...90% RH (non condensing) / -20...60°C (-4...140°F) 0...90% RH (non condensing) / -20...60°C (-4...140°F) 2 Working temperature range Storage temperature range 1) UV=24V DC and RL=250 Ω for version with current output 2) refer to the working range of the humidity sensor HC103! 3) warm up time for performance according specification Connection Diagram Analogue...