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CO2MC 230V – CO2, Temp & RH Monitor

The Duomo CO2MC has been developed to monitor levels of Carbon Dioxide in offices, schools, kitchens or labs. This is the 230V version, also available in 24V. The monitor has a backlit traffic light display. As CO2 levels increase the backlight will change from green to Yellow. If the levels continue to rise the backlight will change to red.

Quantity discount

Quantity 1-4 5-9 10-24 25+
Price £204.40 £158.70 £115.00 £101.33



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The CO2MC 230V Monitor & Controller monitors room CO2, temperature and humidity.

There are four model options:

  • CO2MC-R Room
  • CO2MC-K Kitchens
  • CO2MC-L Labs
  • Custom setpoints

Features include an audible alarm and a back lit traffic light display. It also provides an on/off volt free relay output to control ventilation.

It is available to suit requirements, custom built or preset. The three standard versions are for use in kitchens, school classrooms and laboratories.

As automatic ventilation systems are not always installed the monitor allows users to decide themselves when ventilation is needed. Putting control back into the hands of the user.

The location of the monitor, for example in schools or kitchens, dictates different setpoints for each display colour change. Not all classrooms or offices have an automatic ventilation system based on air quality and CO2 levels. This allows occupants to determine when additional ventilation is required; putting control back into the hands of the teachers.

The CO2MC 230V monitor has a volt free relay output. For 0-10V analog output for CO2 & temperature please see the TLD1.



Product Details

  • Three colour (green/yellow/red) LCD backlight indicating ventilation requirement based on CO2 measurement
  • Non dispersive infrared sensing technology
  • Relay output to control a ventilator
  • Digital display of carbon dioxide levels (ppm)
  • Temperature and humidity monitoring
  • Dual alarm indication; audible alarm and backlight colour switch
  • Easy touch button for operation
  • Desktop or wall mounted
  • 3 year guarantee


Onsite Diagnostics

If you require onsite diagnostics or technical assistance with any of our products please contact us

  • This field is for validation purposes and should be left unchanged.


We recommend Duomo Gas Detection products are serviced at least annually to ensure efficacy and extend sensor life. Our qualified team of engineers are available Nationwide.



  • CO2MC (230 Volt) Datasheet

    306.08 KB | pdf

  • CO2MC (24V AC/DC) Datasheet

    223.86 KB | pdf

  • CO2MC Model Selection

    28.65 KB | pdf

  • CO2MC Advanced settings guide

    558.42 KB | pdf


Support & Service

If you require technical assistance or an annual service on this product please contact us and we will be happy to help. Our qualified team of engineers are available Nationwide.

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