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Extech CO220 (offer)

Contact Instrument Solutions

Extech CO220 desktop indoor air quality CO2 monitor with data logging capability, AC adapter, software and PC lead. *** Excess stock unit ***


The Extech CO220 is a compact desktop indoor air quality meter that measures and data logs carbon dioxide (CO2) level, air temperature, humidity and date and time. The CO220 also has the added capability to calculate dew point and wet bulb temperatures. With visible and audible low and high level alarms, this is an ideal instrument for indoor air quality (IAQ) diagnosis.

Typical applications include schools, hospitals, greenhouses, offices, factories and hotels.

*** FURTHER REDUCTIONS FOR A LIMITED TIME ONLY *** excess stock 2018 list prices £182.99 now available at fantastic offer price of only £109.00.


  • Displays carbon dioxide (CO2) concentrations
  • Maintenance free (NDIR) CO2 sensor
  • CO2 reading displayed in ppm with six facial icons indicating indoor air quality levels
  • Audible CO2 warning alarm in the event of concentration levels exceeding high or low level user defined set points
  • Minimum and maximum CO2 value recall function
  • Calculates dew point and wet bulb values
  • Calculates statistical weighted averages of TWA and STEL
  • Complete with AC adaptor


CO2 range 0 to 9,999 ppm

CO2 resolution 1 ppm

CO2 accuracy ± (5 % rdg + 50 ppm) from 0 to 2,000 ppm

Temperature range - 10 to 60 °C

Temperature resolution 0.1 °C

Temperature accuracy ± 0.6 °C

Humidity range 0.1 to 99.9 %

Humidity resolution 0.1 %

Humidity accuracy ± 3 % (10 to 90%), ± 5 % (< 10 % or > 90 %)

Display LCD

CO2 sensor type NDIR (non-dispersive infrared) technology

Humidity sensor type Capacitance

Air temperature sensor type Thermistor

Datalogging Up to 99 CO2 readings

Dimensions 155 x 87 x 82 mm

Weight 178 g

Support documents

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Extech CO220 data sheet.pdf Extech CO220 data sheet
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Extech CO220 user manual.pdf Extech CO220 user manual
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