Carbon Monoxide Analyzer Carbon Monoxide Measurement Range (PPM) 0 - 4000 ppm Carbon Dioxide Concentration 0 to 0.1 Percent Temp Range +5 Degrees to 40 Degrees C Relative Humidity Range 30 Percent to 70 Percent Dew Point Range 68 Degrees to 212 Degrees F Oxygen Concentration 0 to 21 Percent Humidity Accuracy +/-3 Percent Accuracy +/-0.3 Percent of Reading or +/-5 Degrees F Resolution 0.1 Percent Display Backlit LED Auto Power Off No Low Battery Indicator Yes Sensor Life 4 yr.