Air Quality Carbon Dioxide Datalogger Carbon Monoxide Measurement Range (PPM) Not Applicable Carbon Dioxide Concentration 0 to 9 999 ppm Temp Range 14 Degrees to 140 Degrees F (-10 Degrees to 60 Degrees C) Relative Humidity Range 5 to 95 Percent Dew Point Range Not Applicable Oxygen Concentration Not Applicable Humidity Accuracy +/-3 Percent Accuracy +/-50 ppm +/-5 Percent of Reading Resolution 0.1 Degrees 0.1 Percent 1 ppm Display LCD Data Hold Yes