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We are a developer and manufacturer of advanced networking and communications technology. Our innovative networking, storage, security and home automation products are designed in our own laboratories and distributed in many European countries.

Security And Monitoring Sensors

The sensors are the heart of ALLNET building testing and provide a comprehensive way to obtain data about the environment and climate and use it, for example, to control actuators and I/O inputs via the sensor meters.

Signal lamp / signal light

pdf-download 192872-1  Art. nr. 192872

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CO2 Room Air Quality Lamp/traffic light for infection control ventilation in schools


The universal network signal lamp with integrated NDIR-CO2 sensor comes in an attractive plastic housing. The lamp is supplied with the required energy by an environmentally friendly plug-in power supply unit or via PoE (power supply via a single network cable with data and power). The ALLNET PoE lamp is equipped with a high quality industrial multisensor which offers a high CO2 measuring range of 0~40000ppm. In the ideal range (25°C, 400 - 10'000 ppm it offers an accuracy of ± (30 ppm). The signal lamp automatically converts the measured variables into an optical standard signal, which can be directly displayed visually in the respective color via the integrated LEDs.


The room air traffic light serves as a reference value transmitter for room ventilation for infection protection-compliant ventilation in daycare centers/kindergartens, large daycare centers, therapeutic daycare centers, offices, fitness studios, hotels, retirement homes/nursing homes, waiting rooms, retail stores, clubhouses, public authorities and institutions, churches or other prayer rooms and, of course, schools.


This enables energy-saving and demand-based room ventilation, thus reducing operating costs and increasing the well-being of people in the premises.


In general, it is recommended that ventilation should be used above a concentration of 1000 ppm CO2 in the indoor air (level yellow), but above 2000 ppm (level red) ventilation is required to ensure adequate indoor air quality. For the school area, a threshold value of 1000 ppm is considered authoritative. The aforementioned threshold values refer in each case to the instantaneous value. If the CO2 concentration rises above this specified value, a ventilation measure - manual ventilation via windows or automatic activation of a room ventilation system - should ideally be taken. If the CO2 content is below the critical threshold, it can be assumed that the virus concentration in the air is also reduced.


The alarm is triggered by a visual display and can be optionally implemented acoustically or via e-mail, FTP or upload to the cloud.


Presets (can be modified in embedded software):

  • at 0~999 ppm: level green
  • at 1000~1999 ppm: level yellow
  • at 2000~10000 ppm: level red


The advantage of ALL-PoE-CO2 lamp over other CO2 lamps currently on the market is that the ALLNET version has an intelligent/smart signal lamp with its own integrated web interface, through which even more options can be used.


Added value of the ALLNET solution compared to similar solutions

  • If you change the guideline values, such as new specifications from the Federal Environment Agency, the ALLNET version can always be flexibly adapted to the new standard via the web interface.
  • All lamps can be visualized via the integrated web interface. Via the cloud, the values can also be followed by the parents of the class.
  • In the ALLNET version you can also configure a recording of the values and export them as CSV/XLS data.
  • In the ALLNET version you can configure a rule in case of exceeding/falling below etc. which will send the values by email.
  • In the ALLNET version is also a buzzer built in which can be used for optional actions.
  • The ALLNET version also has an additional sensor port from our measure and control product series. Via this sensor port you can connect a variety of external sensors for temperature or humidity up to contact inputs with magnetic contacts to detect the window openings.


The high-quality Sensirion multisensor has an integrated dual-channel principle for measuring carbon dioxide concentration and is designed to automatically compensate for possible long-term drifts.


Possible areas of use:

  • Offices
  • Waiting room of a doctor's office
  • Patient room in hospital
  • Retail sales area
  • Open-plan office
  • Conference room at a lawyer / tax consultant
  • Hotel room / lobby
  • Fitness studios
  • Restaurants and bars
  • Authorities / Public institutions
  • Clubhouses
  • Churches / Mosques / a.o. prayer rooms
  • Assisted living rooms
  • Retirement home / nursing home
  • Kindergarten
  • Large day care centers
  • Therapeutic day care centers
  • Day care centers
  • Kitas
  • Classrooms



Example web interface:



Technical Details:











1x 5.5mm/2.1A power supply connector (48V power supply included)

1x I2C sensor port for optional ALLNET sensors or actuators

1x 100Mbit RJ45 LAN with integrated PoE IEEE802.3af

1x 3,5mm jack socket for console (programmer/interface)


CO2 Sensor

CO2 measuring range 0- 40'000 ppm

CO2 measurement accuracy ± (30 ppm + 3% MV) ideal range (25 °C, 400 - 10'000 ppm)

Repeatability 10 ppm

Temperature stability 2.5 ppm / °C (0-50 °C)

Response time (t63) 20 s


Network connection:



1x RJ45 10/100Mbps



Wireless LAN:



Ralink/Mediatek MT7688AN Chipset

2.4 GHz Wireless N, up to 150 Mbps

Security: WEP 64/128bit, WPA, WPA2



Supported standards:



IEEE 802.3

IEEE 802.3u

IEEE 802.11b/g/n



Power supply:



100~240 VAC, 50/60 Hz, 48V / 0.5A external power adapter



Power consumption:



<3 watts maximum


LED brightness:



  • White: 14x12lm = 168lm
  • Red: 14x10lm = 140lm
  • Green: 14x20lm =280lm
  • Blue: 14x6lm = 84lm

Buzzer Volume:

min. 85dB





Design plastic case (optional metal anti-theft protection available).






Operating temperature: 0 ~ 40 °C

Operating humidity: 10% ~ 85% (non-condensing)

Storage temperature: -20 ~ 60 °C

Storage humidity: 5% ~ 90% (non-condensing)












145 x 145x 15 mm (length x width x height)

Ø145mm diameter






249 grams



Package contents:




- Power supply external "48V 0,5A

- Patchcable

- Instruction manual



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