Central detection of carbon monoxide (CO) and nitrogen dioxide (NO2) with 4 zones, with two alarm levels per zone. 3 relay outputs per zone (two for extraction / ventilation control and one for general alarm). Designed for applications where concentrations of CO and / or NO2 can accumulate and need to be controlled, to protect people. Certified according to standard UNE 23300. Indicator by display of the concentration of CO in ppm (Sensitivity from 0 to 300 ppm) showing the reading of the detector with the highest detection level and the number corresponding to said detector. Compatible with ME300 range detectors, with the possibility of combining carbon monoxide and nitrogen dioxide detectors in the same area. Quick turnaround time. Up to 16 detectors per zone. 230 V power supply. Connection to the detector using a 2 x 1.5 mm² hose cable. Dimensions: 488 x 195 x 185 mm.