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Carbon dioxide detector in dust-proof box. The IR sensor assures alarm signal through 4-20mA proportional output. Measuring range from 0 to 300000 ppm. Can be used with relay board on double threshold control panel with pre-alarm 10mA and alarm 20mA. Operating voltage 12-24VDC. Power consumption 90mA. Operating temperature from -25°C to +60°C. Relative humidity up to 90%. In EEx n certified box.