While it is commonly known carbon dioxide levels affect productivity in working and learning environments, studies show that high levels of airborne illness tend to amplify in rooms with poor levels of air circulation and ventilation. Ventilation brings in fresh air which helps to circulate stagnant air, and removes particulates and allergens. As coronavirus is transmitted through the air, the demand for good ventilation is now more critical than ever during the COVID-19 pandemic.

CO2 sensors with LED indicators offer an extremely effective visual guidance for carbon dioxide levels, a key indicator of the air quality. The amber/red LEDs indicate the need to ventilate the space or open windows, a simple fix so easily overlooked.

At Titan, we are always looking at ways to improve our products and ensure they are suitable for our customers applications. This is why after the advice from REHVA and CIBSE we have taken the step to modify and lower our traffic light LED indication thresholds on all our CO2 sensors to comply with the new guidance and recommendations.

Recommendations for CO2 air quality monitoring

The Federation of European Heating, Ventilation and Air Conditioning Associates (REHVA) have advised lowering the default settings of traffic light indicators to in order to promote as much ventilation as possible.

Due to the epidemic, REHVA recommend changing

“the default settings of the traffic light indicator so that the yellow/orange light (or warning) is set to 800 ppm and the red light (or alarm) up to 1000 ppm in order trigger prompt action to achieve sufficient ventilation even in situations with reduced occupancy. In some cases, standalone CO2 sensors or ‘CO2 traffic lights’ can be used.”

REHVA COVID-19 guidance document, August 3, 2020

The Chartered Institution of Building Services Engineers recommends “standalone CO2 sensors or CO2 traffic lights” to be used due to the pandemic. This recommendation has been adopted by Loughborough University who recently purchased our Titan Products CO2 LED Indicators in order to be compliant with this new COVID guidance. The easy to understand traffic light design allows users, such as teachers, to respond quickly.

How Titan Products can help

In line with the guidance from REHVA, Titan Products have altered the traffic light LED settings.

LEDPrevious settingsNew settings
GreenBelow 1000Below 800
RedAbove 1500Above 1000

Our Range

At Titan, we offer a wider range of options for CO2 monitoring with LED indication ranging from battery powered CO2 indication only devices and traditional 0-10V wired sensors, to wireless and Smart BACnet/Modbus Co2 sensors, all at very competitive prices.

Battery Powered CO2 for indication onlyThe CO2 indicator uses a low power consuming CO2 cell, giving it the best possible battery life and because it uses the 3.6V, 2600mAh lithium thionyl chloride battery, you do not need to wire the unit, making it extremely easy and cost effective to install.

Wired CO2 Sensors (available with Temperature and Humidity monitoring)Providing 0-10V signals for CO2 levels in the measured space. The sensors offer automatic calibration technology and optional LED traffic light.

Smart CO2 Sensors (with BACnet and Modbus Communications)Monitoring the space CO2, humidity and temperature conditions and the measurements are exposed directly onto a BACnet MS/TP or Modbus RTU network. The traffic light LED boundaries can be edited over BACnet.

Wireless CO2 SensorsOur TPZ-Net wireless CO2 sensors also offer the option for LED indication. The data is exposed via the TPZ-Net co-ordinator to a BACnet MS/TP or Modbus network. The battery powered sensors offer low cost and quick installation due to the removal of any cabling.


For more information please contact the sales team or visit: https://titanproducts.com/product-category/co2-and-co-sensors/ for our full range of CO2 sensors.

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