Air Quality Guardian


Reduce the risk of airborne viruses being spread and give your people true peace of mind – give them an Air Quality Guardian.

Key Features

  • Large backlit LCD screen
  • Real time measurements of CO2, temp and RH levels
  • Simple 4 button navigation
  • Ready to use – straight from the box
  • Wall mountable or desktop
  • Low drift NDIR (Non dispersive infra-red) CO2 sensor with a long lifespan
  • Built-in data logging
  • Simple three-level indoor air quality indication system including: Green (under 800ppm); Amber (800ppm to 1200ppm); Red (1200ppm+)
  • Configurable audible and visual alarms
  • Power and charge via USB
  • 8 hour battery backup as standard
  • Option to switch to a plant monitoring mode (See our manual for the various options and alarm settings)

Industries that use the AQG to monitor CO2

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Hotels, Restaurants, Fast Food, Bars


Schools, Colleges, Universities, Academic facilities


Theaters Cinemas, Stadiums, Gyms , Leisure Centers, Yoga Studios

medical industry icon


Hospitals, Nursing Homes


Cruise Ships, Ferries


Facilities Offices, Meeting Rooms, Conferences, Exhibitions, Places of Worship, Homes, Condos

CO2 monitoring with the Air Quality Guardian

By using the Air Quality Guardian as part of your HVAC system, you can also ensure the health and wellbeing of those in the area. This unit uses a simple traffic light system to let you know at a glance when fresh air is needed. By ventilating, you are reducing the risk of a virus such as COVID-19 spreading.

A fresh, clean air environment also increases productivity and strengthens the immune system.


Do you need help to comply with ventilation and CO2 monitoring to adhere to Assembly Bill 841, Chapter 372?

With over 40 years experience in gas sensing systems, we can offer you a total solution for air quality monitoring and alarms.

We are proud to be a listed partner on the ‘Educational Hub’, helping to equip educational facilities with the safety equipment needed.

Air Quality Guardian CO2 Monitor

A few bits to remember about the Air Quality Guardian:

Providing data it lets you know when to ventilate the area, helping to reduce the spread of airborne viruses’ such as COVID-19, flu and the common cold

It has a simple-to-use traffic light warning system

Ready to use – straight from the box

CE, UKCA, RoHS 2.0 and FCC compliant.

Air Quality Guardian CO2 Monitor


  • Energy efficiency
  • Save time and money with self-calibration (manual calibration optional)
  • Use data logging to analyze trends in your building
  • Real time alarms
  • Helps to reduce the spread of airborne viruses such as COVID-19, flu and the common cold
  • Improved health benefits
  • Increased productivity, reduced fatigue
  • Power failure battery backup
  • Simple and intuitive to use

Case Studies, Articles and Blogs

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