Extech CO200 Desktop Indoor Air Quality CO2 Monitor

Extech CO200 Desktop Indoor Air Quality CO2 Monitor


The Extech Desktop Indoor Air Quality CO2 Monitor checks for carbon dioxide concentrations.


  • Max/Min CO2 value recall function
  • Visible and Audible CO2 warning alarm with relay output for ventilation control
  • Maintenance free NDIR CO2 sensor
Free Shipping on this product
Your Price
Drop ships from manufacturer

Shipping Information
Return Policy
Why Buy From Fondriest?


The Extech Desktop Indoor Air Quality CO2 Monitor measures carbon dioxide, air temperature, and humidity. The instrument features a maintenance free non-dispersive infrared CO2 sensor. Indoor air quality is displayed in parts per million with good (380 to 420ppm), normal (<1000ppm), and poor (>1000ppm) indications. The visible and audible alarm with relay output has user-settable high and low alarms. The monitor also displays year, month, date, and time. It is calibrated through the automatic baseline calibration (minimum CO2level over 7.5 days) or manually calibration in fresh air. 


Applications include monitoring air quality in schools, office buildings, greenhouses, factories, hotels, hospitals, and anywhere that high levels of carbon dioxide are generated.

Notable Specifications:
  • CO2 Range: 0 to 9,999ppm
  • CO2 resolution: 1ppm
  • Temp range: 14 to 140 °F (-10 to 60 °C)
  • Temp resolution: 0.1 °F/°C
  • Humidity range: 0.1 to 99.9%
  • Humidity resolution: 0.1%
  • Dimensions: 4.6 x 4 x 4" (117 x 102 x 102mm)
  • Weight: 7.2oz (204g)
What's Included:
  • (1) Desktop CO2 Monitor
  • (1) Universal AC adaptor
Image Part # Product Description Price Stock Order
Extech CO200 Desktop Indoor Air Quality CO2 Monitor CO200 Desktop indoor air quality CO2 monitor
Drop ships from manufacturer

In The News

Flux towers track CO2 exchange between forests and atmosphere

Determining exchange rates of carbon dioxide between the earth’s forests and the atmosphere is turbulent business. Wind above forest canopies swirls as vortexes of air enter and exit stands of trees.  Across the globe, towers stand among the landscape, with sensors monitoring these eddies for carbon dioxide, water vapor and other gasses.  These so-called “flux towers†collect data on carbon dioxide exchange rates between the earth and atmosphere. Information gathered plays into the debate on the measurable effects of climate change. Carbon dioxide flows between the earth, atmosphere and ocean in an attempt to reach equilibrium. As automobiles and energy production facilities burn fossil fuels, more carbon dioxide joins to the mix.

Read More

US Steel Dumping Chromium: Citizens Fighting for Lake Michigan, and Drinkable Water

If you remember the movie “Erin Brockovich,†you are already familiar with hexavalent chromium, a toxic substance that was contaminating the drinking water of people in California in the movie ( and in real life ). Although on the silver screen there was a very satisfying Hollywood resolution to the problem, there has not yet been such a happy ending in real life. The dumping of the hexavalent chromium by PG&amp;E that the film documented took place in the 1950s and 1960s, although the company didn't tell anyone about the problem until the late 1980s. Based on current litigation around the Illinois and Indiana shores of Lake Michigan, startlingly little has changed.

Read More

Monitoring the Mississippi: Wild Celery, Redhorse and More

The Upper Mississippi stretches from headwaters at Lake Itasca, Minnesota, all the way to Cairo, Illinois, about 1,250 miles. It includes picturesque wilderness areas complete with waterfalls, limestone bluffs and expansive valleys. It has attracted many campers, hikers, fishing enthusiasts and people seeking to launch their favorite boats or canoes. It has also been a haven for environmental researchers. Since 2016, Jeff Houser is the Science Director for the Long Term Resource Monitoring element (LTRM) of the Upper Mississippi River Restoration Program (UMRR).  Previously, he led the LTRM water quality component from 2003 until 2016.

Read More