IAQ MINI CO2 Monitor

IAQ MINI CO2 Monitor
Regular price $139.00

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The IAQ Mini - CO2 Monitor is a low cost, easy to use, desktop indoor air quality device for indoor air environments such as homes, offices, conference rooms, classrooms, and many others.

The RAD-0302 displays a modern, sleek LED Display indicating Carbon Dioxide (CO2), Temperature, and Relative Humidity. 

The RAD-0302 is easy to use, measures air quality instantly, and includes a 3-color LED Back-light (green/yellow/red) which gradually changes color dependent upon CO2 concentration level.


  • Dual Beam NDIR technology 
  • Large LCD display for clear indication of CO2, Temp, and %RH
  • Vibrant Custom Configurable Backlight Display to indicate CO2 concentration (Green/Yellow/Red)
  • Easy to use, "Plug and Play" capabilities
  • "History" with 3 emotions indicates the status of CO2
  • ECO saving power function darkens the LCD during periods
  • Easy Fresh Air Self-Calibration.


This device will NOT meet requirements for CO2 safety monitoring which requires a Fixed/Wall mounted, hard-wired alarm per the NBIC, NFPA, or IFC regulations. Refer to our CO2 Safety Products page for devices that meet your needs.

Call us at (877) 678-4259 toll-free or email us to speak with our technical sales team about purchasing the correct device.

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  • CO2 Measurement Range: 0-9,999ppm
  • Accuracy: 0-3,000ppm ± 100ppm or ± 7% of reading
  • Display Resolution: 1ppm
  • Warm-Up Time: 10 sec
  • Response Time: 1 min. 
  • Temperature Range: 0°C to 50°C (32°F to 122°F)
  • Accuracy: ±1°C (±2°F)
  • Humidity Range: 0-95% RH non-condensing 0%~99%
  • Power Supply: USB Cable or 5 VDC from external AC/DC adapter which is not included in the package (Please use a standard USB power supply
  • DC Output Voltage: 5VDC/ >300mA
  • Sensor Life Expectancy: 15 years


  • 1 year - See CO2Meter Terms and Conditions.
  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

Customer Reviews

Based on 7 reviews
Eric Lundberg
Good, could be great

Pro: Reasonably priced given CO2 sensors seem fairly costly. Responsive. Temp/RH seem fairy accurate as well and it is nice having them on the screen.

Pro: Graph is nice, I wish they did it as 24 smaller bars so I could see the effects of exercising for any hour historically vs the -3, -6, -12, -18, -24 which quickly hide an hours worth of high CO2 values, but good enough for broad trending.

Con: Screen viewing angle is terrible vertically, can't have it up on a shelf because you can't see it. Can still see the colors but that is very broad data vs the actual numbers and graph.

Minor Nit: History data is all lost if you unplug it. It is a tiny amount of data and seems like it would be super cheap to add the tiny bit of persistent memory to keep it around.

The best type CO2 monitor at the computer desk

This unit help me see, that my co2 level at my desk at home was too hi. And my humidity was too low at 11%.
Low humidity makes a house feel cooler. Cooking in oven on a gas stove makes a lot of CO2. Now I can control it.

Denis Gosselin

We like your CO2 meter, because here it is a private foster family but under government surveillance and with those Co2 meter, the authorities are very happy to ensure the quality of the air in the building because we are the only one doing it around here.

Guy Darienzo
Works wonderfully

We use this to ensure excellent ventilation in our café.

Air quality

I am very happy with the clear bright display and ease of using and accuracy.

"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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