We know from our own experience that staying in poorly ventilated indoor spaces causes fatigue, and lack of concentration, up to and including discomfort and headaches. The reason for this is an excessively high CO2 content in the room air. Since CO2 is produced when we breathe out, the CO2 concentration quickly rises to a high level in rooms where there are many people. To reduce the CO2 concentration, the proportion of fresh air must be increased again by adequate ventilation.

Ventilation Helps – Also to Fight Corona

It is now known that the Corona virus (COVID-19) can spread indoors via aerosols. A regular supply of fresh air not only reduces the CO2 content but also the aerosol concentration in the indoor air. This also reduces the risk of infection by potentially viral particles.

Ventilation, of Course, but When and for How Long? – The CO2 Traffic Light Knows

One simple and reliable way of ensuring good indoor air is monitoring the CO2 content with a CO2 traffic light. The principle is simple: the measuring device measures the CO2 concentration and signals when and for how long ventilation needs to take place.

The CO2 Guard 10 by E+E Elektronik does just that!

CO2 Guard 10 - the CO2 Concentration Always in View

CO2 Guard 10: Set Up – Measure – Ventilate – Breathe

Easy Handling

The CO2 Guard 10 is immediately ready for use. The battery-powered device does not require an external power supply and can therefore be flexibly placed in any room. No cable – no tripping hazard – absolutely safe.

Depending on the requirements, the CO2 traffic light can be used as a desktop unit or wall-mounted using screws.

Only four standard AAA batteries (included in the scope of delivery) or equivalent rechargeable batteries are required to operate the device. A set of batteries lasts for typically six months at room temperature.

When it is time to change the batteries, this is indicated by all LEDs flashing. A battery change can be done quickly and without tools.

Easily Understandable Traffic Light Principle

The CO2 concentration measured is displayed using different coloured LEDs in a traffic light system. The 6-part measured value scale with predefined threshold values is based on the EN 13779 standard and covers all common indoor situations.

Especially in rooms with a high density of people, such as school classes, the CO2 concentration rapidly rises to a high level. The CO2 ranges shown are from <800 ppm to >3000 ppm and offer a practical aid for an individual ventilation strategy.

In addition to the visual display, an audible warning signal is output as soon as the next higher threshold value is reached.

Demand-Driven Ventilation - Saving Energy Costs

Particularly in the winter, ventilation by opening the windows involves substantial energy loss. The cold outside air inflow reduces the indoor temperature and heating energy needs to be used. This is why the windows should only be left open for as long as needed.

The CO2 Guard 10 shows when the CO2 content has dropped back to the desired level and the windows can be closed. And this helps to save energy costs. 

By the way, the most effective way of supplying fresh air is to ventilate by fully opening the windows for a short period, or by rapid cross-ventilation through windows that face each other. Ventilation through permanently tilted windows is not only inefficient but also causes unnecessary heat loss. 

Precise and Maintenance-Free – Thanks to State-of-the-Art CO2 Measuring Technology

The key component in the CO2 Guard 10 is the high-quality EE895 CO2 sensing module. It is based on the dual wavelength NDIR measurement principle, which offers long-term stability, and ensures exact and reliable CO2 measurement values. Thanks to smart auto-calibration, the sensor is practically maintenance-free.

Temperature and pressure compensation by means of integrated sensing elements is another of the EE895's benefits. This allows the sensing module to offer constantly high CO2 measuring accuracy, regardless of the location (sea level), weather influences and temperature fluctuations.

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    E+E Elektronik headquarters, Engerwitzdorf/ Austria

Quality, Made in Austria

E+E Elektronik has been engaged in the development and production of high-quality sensors and measuring devices since 1990. The high-precision climate sensors by the Austrian sensor specialist are used worldwide for ventilation and climate control and in facility automation, among other applications.

The E+E products are manufactured exclusively at the company headquarters in Engerwitzdorf. Compliance with the highest quality standards (ISO 9001 and IATF 16949) is a matter of course.

Many years of experience and expertise in measuring technology make E+E Elektronik your reliable partner in sensor technology.