- Easy installation without electrician, wall mounting
- optical display, from 1000 ppm yellow, from 2000 ppm red
- Adapted electronics for trouble-free teaching
- Detection of Carbon dioxide (CO2) from used air
- internal infrared sensor 3000 ppm (+/- 0.01%vol.)
- automatic shutdown of the LEDs in the dark
- Standard color green (RAL 6024)
- optionally available in the colors white (RAL 9016) and gray (RAL 7032)
The optical warning device measures elevated CO2 levels in indoor spaces where many people regularly spend time - such as classrooms, gymnasiums, auditoriums and lecture halls, kindergartens and common rooms.
According to EU standard EN 13779, as little as 1400 ppm CO2 in indoor air is considered "very bad air"; the maximum workplace concentration MAK in Germany is 5000 ppm.
The "SCHOOL" CO2 traffic light with its yellow light reminds already from 1000 ppm according to a recommendation of the RKI for extensive shock ventilation of the room.
- How much electricity does the CO2 traffic light actually consume?
Due to the automatic dimming of the LED lights of our traffic lights at night, the actual power consumption is extremely low and thus also helps to save energy:
0.03 kWh in 24 hours*
(Important: the traffic light should not be disconnected from the power supply at night because the automatic self-calibration is designed for 7 days of continuous operation in order to determine better, more realistic standard values!)
*current measurement as of 08.11.2022
- On which side and at what height should the traffic light be mounted?
The traffic light is not mounted directly next to the windows on a wall. The height of the traffic light should be high enough to be visible from as many places as possible and at most so that the touch field for resetting the acoustic signal can still be touched comfortably with the hand.
- How many square meters does a traffic light cover?
CO2 from breathing air is distributed quite homogeneously in the room. In classrooms, one traffic light is sufficient, a standard gymnasium should be equipped with 2 traffic lights and a Pax400 auditorium perhaps with 3 or 4 traffic lights. This also depends on the room geometry and cannot be expressed in square metres.
- How long does it take for the device to be ready for operation after it has been switched on?
[embedyt] https://www.youtube.com/watch?v=G_EHMnq9Jv8[/embedyt]In less than 90 seconds the first meaningful evaluation with immediately displayed result takes place.
- Does the device stay on continuously for 24h or is it to be switched on every time the room is used?
The traffic light is suitable for both possibilities; if it is only switched on when the room is in use, one can assume a longer service life.
- Does a self-calibration take place?
To ensure consistent correct Co2 measurement results, make sure that the Co2 traffic light is switched on every 7 days (from year of manufacture 2021), or every 24 hours (before year of manufacture 2021) is exposed to fresh air for at least 30 minutes. Simply ventilating the room in which the measuring device is installed is sufficient for this. This leads to a constant self-calibration, thus to the full and accurate functioning of the device.
- The instructions say: "Inspection after 5 years". How does that work?
Basically, you can check the sensor yourself. Simply blow on it calmly for about one minute and observe the colour changes on the traffic light. You can also send us the traffic light for a free factory inspection, during which we may readjust the sensor. If we need to replace the sensor, you will receive a discounted replacement offer, just as with all other gas detectors from our company. Regular or daily draught-ventilation also helps the traffic light to a higher and longer reliability.