Desktop Air Quality CO2 Monitor

Desktop Air Quality CO2 Monitor



Extech CO2, Temperature, Humidity, Dew Point & Wet Bulb Monitor Part Number: CO220


  • Measures Carbon Dioxide (CO2), Air Temperature & Humidity
  • LCD Display Shows Current Levels, Facial Icon Indicating Quality Levels and Date/Time
  • Audible High/Low Alarms, Automatic Baseline Calibration Function
  • Calculates Statistical Weighted Averages, Dew Point and Web Bulb Values
  • Maintenance Free NDIR (Non-Dispersive Infrared) CO2 Sensor


Carbon Dioxide Sensor Type: NDIR (Non-Dispersive Infrared) Sensor
Range: 0 to 9,999 ppm
Resolution: 1 ppm
Accuracy: ±(5.0%rdg + 50 ppm) From 0 to 2000ppm
Humidity Sensor Type: Capacitance Sensor
Range: 0.1 to 99.9% RH
Resolution: 0.1% RH
Accuracy: ±3% RH (10 to 90%); ±5% RH (<10% or >90%)
Temperature Sensor Type: Thermistor
Range: -10°C to 60°C (14°F to 140°F)
Resolution: 0.1°C/°F
Accuracy: ±0.6°C (±1°F)
Data Storage Capacity 99 Readings
Power Source 9 VDC Universal Plug Adapter
Operating Temperature 0 to 50°C (32 to 122°F); 5 to 80%RH
Storage Temperature -20 to 50°C (14 to 122°F); 5 to 90%RH
Display 3 Tier Multi-function LCD
Weight 6.2 oz. (178 grams)
Dimensions 155mm x 87mm x 81.5mm (6.1" x 3.4" x 3.2")