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Werma Co2 Traffic Light

Best air quality thanks to WERMA CO2
traffic light Traffic light set helps to ensure “correct”
ventilation in enclosed spaces to avoid high
concentrations of CO2 and aerosols in the room.
Given the current coronavirus pandemic, we are in an
unprecedented, exceptional situation. The current situation is
changing our lives in all aspects and we face new challenges every
day. People’s health and protection are a top priority.
For this reason, the Government and companies are constantly
looking for new ways to halt the global pandemic and to meet
constantly changing conditions. WERMA Signaltechnik is making an
important contribution to this: With the new CO2 traffic light, the current carbon dioxide (CO2) concentration in the ambient air can be measured and made visible. The three traffic light colors clearly
show whether ventilation is necessary or not.
This avoids high concentrations of CO2 and aerosols in the ambient
air of any offices and conference rooms, restaurants, shops,
theatres, doctor’s practices, universities, gyms and all other public
buildings and reduces the risk of transmission of COVID-19 to a
minimum.
Green light indicates: Everything’s OK!
An increased CO2
concentration in the room can correlate with an
increased bacterial concentration as well as increased infection and
absence rates. In order to sustainably protect all persons staying
indoors for a longer period of time from COVID-19 infection and
other infectious diseases, it is necessary to ventilate regularly.
Therefore, the Federal Environment Agency officially recommends
ventilation from 1,000 ppm (ppm = parts per million, i.e. volume
parts per million volume parts).
This is where WERMA’s new CO2
traffic light comes in: It continuously

measures the current carbon dioxide concentration in the ambient

air and shows precisely whether or when it is time for the next
ventilation.
This is illustrated in a clear way with the help of the three common
traffic light colors so that everyone easily understands:
  • If the CO2 concentration is below 1,000 ppm, the traffic light is green, indicating that the air quality is OK.
  • If the CO2concentration exceeds 1,000 ppm, the traffic light turns yellow and indicates that ventilation is recommended.
  • The red signal indicates that significant ventilation is necessary as the CO2 concentration is above 2,000 ppm.
  • If the limit value of 3,000 ppm is exceeded, a red flashing light indicates the acute urgency of ventilation.
The WERMA CO2 traffic light
WERMA’s solution for CO2 measurement in indoor air consists of a
three-stage signal tower, which is immediately ready to use and
very easy to install thanks to Plug & Play: Simply plug in the
supplied power supply, wait until the self-calibration is completed
and the traffic light is ready for use. The current CO2 concentration in the ambient air is measured immediately and displayed using the
three traffic light colors.
The traffic light is clear, easy to understand and does not require
explanation. The signals are clearly visible from all sides thanks to
the 360-degree illumination and the extremely bright LEDs
guarantee that they are clearly visible even in direct sunlight and
bright surroundings.
Ideally, the CO2 traffic light is placed in the middle of the room, i.e.
not too close to the window and not higher than 2 meters from the
floor. Since carbon dioxide is distributed fairly evenly throughout the
room, a traffic light is sufficient for most rooms. Two traffic lights are
recommended in larger conference rooms or sports halls.
High air quality – more important than ever
Thanks to WERMA’s CO2
traffic lights, air quality in enclosed spaces
can be improved in the long term, as high concentrations of carbon
dioxide and aerosols in enclosed spaces are avoided through regular

and effective ventilation. This not only achieves a more hygienic, but

also more productivity-friendly and better indoor air. “We are
delighted that the CO2 traffic light is not a short-term investment for public buildings, offices and universities,” says Manuel Schutzbach from WERMA Technical Sales. “Because a low CO2
content in the room not only protects against infection, but also improves the concentration and performance of all those present.”
Thanks to WERMA’s new CO2 traffic lights, this not only ensures the highest possible level of safety for employees, customers and
visitors, but also promotes long-term productivity and performance.