AZ Instrument 77597 Combo CO2 & CO& TEMP.& RH% ( Handheld Type )
* Low cost portable meter checking indoor air quality
* Big LCD w/ backlight to display 6 parameters: CO2 , CO, temperature, humidity, dew point, wet bulb temperature
* Designed with NDIR ( non-dispersive infrared) waveguide technology CO2 sensor
* Manual calibration is available for CO2/ CO/ RH%