Indoor Air Quality Meter Carbon Monoxide Measurement Range (PPM) Not Applicable Carbon Dioxide Concentration 0 to 9999 ppm Temp Range 32 to 122 Degrees F (0 to 50 Degrees C ) Relative Humidity Range 0 Percent to 100 Percent Dew Point Range Not Applicable Wet Bulb Temperature Range Not Applicable Oxygen Concentration Not Applicable Humidity Accuracy +/-3.5 Percent (20-80 Percent RH) +/-5 Percent ( less than 20 Percent greater than 80 Percent RH) Air Velocity (FPM) Not Applicable