General
CO2 measurement range	0–40000 ppm
Accuracy	±30 ppm
Operation temperature	25 °C
Current supply	power adapter or PoE
LED type	RGBW
Sensor type	NDIR
Web interface	Integrated
Buzzer	Integrated
Sensor port	1x
Data transmission	LAN (PoE) & WIFI
Alarm functions	Optical, optionally acoustic, E-Mail, FTP, Cloud
Data export	CSV/XLS
Thresholds pre-set	0–999 ppm: Green, 1000–1999 ppm: Yellow, 2000–10000 ppm: Red
Use in schools
Use in kindergartens
Use in offices
Use in nursing homes
Use in hotels
Use in fitness studios
Use in waiting rooms
Use in retail
Use in community centres
Use in government offices
Use in churches
Use in public institutions

The Allnet ALL-PoE-CO2-LAMP is a CO2 room air lamp with integrated NDIR sensor, serving as a signal lamp for demand-based ventilation in indoor spaces. It is delivered in an aesthetically designed plastic housing and acts as a guideline indicator for indoor air quality, particularly in the context of infection control in schools, kindergartens, offices, nursing homes, fitness studios, hotels, waiting rooms, retail stores, community centres, authorities, churches and other public facilities. The lamp detects the carbon dioxide concentration in the air and visualizes it via an optical display in the colours green, yellow and red, prompting ventilation measures. The colour changes occur based on pre-set threshold values, which can be adjusted in the software.

Applications include all rooms where continuous monitoring of indoor air quality is required to protect user health and prevent air pollution caused by elevated CO2 levels. The lamp supports energy-saving and demand-based ventilation, thereby reducing operating costs and enhancing the well-being of occupants. The recommended threshold values are: green at 0–999 ppm, yellow at 1000–1999 ppm, and red at 2000–10000 ppm. Ventilation is recommended from 1000 ppm; from 2000 ppm, ventilation is required to ensure sufficient air quality. These values refer to the instantaneous CO2 concentration.

Functions and equipment in detail include a high-quality industrial multisensor with a measurement range of 0 to 40000 ppm. In the ideal range (25°C, 400–10000 ppm), accuracy is ±30 ppm. The signal lamp automatically converts measured values into a standard optical signal displayed via integrated LEDs in the corresponding colours. The lamp features an integrated web interface, allowing individual adjustment of threshold values. This enables flexible adaptation to new requirements, for example from authorities such as the German Federal Environment Agency. The web interface also allows visualization of all connected lamps.

Technology explained simply includes the use of an NDIR CO2 sensor (Non-Dispersive Infrared), offering high measurement accuracy and stability. The sensor is designed with a dual-channel principle, enabling automatic compensation for potential long-term drift. Power supply is either via an environmentally friendly plug-in power adapter or via PoE (Power over Ethernet), where power and data are transmitted over a single network cable. The lamp is equipped with RGBW LEDs, enabling the colour changes for the optical display. Additionally, a buzzer is integrated, which can be used for optional acoustic alarms.

Compatibility and accessories include the option to connect external sensors via an additional sensor port from the Measure-and-Control product series. This allows connection of sensors for temperature, humidity, or contact inputs, for example with magnetic contacts to detect window openings. The lamp also supports transmission of measurement values via email, FTP, or upload to the cloud. Values can be recorded and exported as CSV or XLS files. Suitable accessories include, for example, the MSR IO ALL4442 (4-channel contact input with pulse extension), the switch ALL-SG8610PMJ, the port multiplexer ALL4404, temperature sensors ALL3008, humidity and temperature sensors ALL4420 and ALL3020, as well as the PoE injector ALL0488v6.

Mounting and installation are carried out at a suitable location in the room, with the lamp connected to the network via LAN (PoE) or WIFI. Installation requires no special tools, as power supply is via PoE or a plug-in power adapter. The integrated web interface enables easy configuration of settings via a web browser.

Operational advantages include flexible adjustment of threshold values, data visualization and recording, and integration into existing networks. The use of PoE reduces the number of cables and simplifies installation. The optical display ensures immediate perception of air quality, while optional functions such as email alerts or cloud upload enable extended monitoring. The lamp is designed for indoor use and provides reliable, long-term measurement of CO2 concentration.