... ) Locale adjustable range of CO2: 0~2,000ppm/0~5,000ppm/20,000ppm/ 0~50,000ppm; adjustable range of ... relay output to control a fan15) CE-Approval2, Description: Gas detectedCarbon Dioxide (CO2)Sensing elementNon-Dispersive Infrared Detector (NDIR)Temperature ... step changeSignal updateEvery 2 secondsWarm up time24 hours (first time)5 minutes (operation)CO2 measuring range02,000ppm (default)020,000ppm, ...