.webp "CO2 sensor indoor")
.webp "CO2 transmitter indoor")
.webp "CO2 meter indoor")
.webp "CO2 detector indoor")
.webp "CO2 controller indoor")
.webp "CO2 monitor indoor")
EU declaration conformity
CO2 controller | wall mounting | LED indicators | 24 V AC - V DC
Product description
Temperature, relative humidity, CO2 (carbon dioxide), and ambient light level are all measured with this CO2 meter.
You can choose between a 24 V AC or 24 V DC supply voltage. Based on all measured values, the sensor algorithm controls a single 0-10 V output. An EC fan, an AC fan speed controller, or a damper actuator can all be directly controlled by this single output. The CO2 sensor component can be replaced, if necessary.
The ambient light sensor can be used in a variety of applications to control the ventilation system based on the amount of people present in the room. Through Modbus RTU communication, all measurements and the output value are available and adjustments can be made for every setting.
The enclosure supports surface mounting.
Additional specifications and description
Photoacoustic NDIR sensing technology
People produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the occupancy and activity level in a space. In many applications, CO2 sensors are used as an indicator for the ventilation requirements. This HVAC transmitter offers a clear, visual indication of the CO2 level via the green, yellow and red LED. The green LED indicates that the CO2 level is within range - there is sufficient fresh air supply. When the CO2 level enters the alert range, the yellow LED lights up. Red means that CO2 levels are too high or that there is insufficient fresh air supply. The measured temperature, relative humidity, CO2 and ambient light level are available via Modbus RTU. Photoacoustic sensing technology is used to measure the CO2 level. This makes the sensor very sensitive and specific, making it useful for the detection of various gases. The use of specific infrared wavelengths that correspond to CO2 absorption lines ensures that interference from other gases is minimised.
People produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the occupancy and activity level in a space. In many applications, CO2 sensors are used as an indicator for the ventilation requirements. This HVAC transmitter offers a clear, visual indication of the CO2 level via the green, yellow and red LED. The green LED indicates that the CO2 level is within range - there is sufficient fresh air supply. When the CO2 level enters the alert range, the yellow LED lights up. Red means that CO2 levels are too high or that there is insufficient fresh air supply. The measured temperature, relative humidity, CO2 and ambient light level are available via Modbus RTU. Photoacoustic sensing technology is used to measure the CO2 level. This makes the sensor very sensitive and specific, making it useful for the detection of various gases. The use of specific infrared wavelengths that correspond to CO2 absorption lines ensures that interference from other gases is minimised.
In contrast to transmissive NDIR sensors, photoacoustic NDIR sensors measure the energy absorbed by CO2 molecules. When the infra-red emitter is pulsed, CO2 molecules absorb infrared light on a regular basis. This causes additional molecular vibration, which results in a pressure wave within the measurement chamber. The higher the concentration of CO2, the more light is absorbed, and thus the amplitude of the acoustic wave increases. A microphone inside the gas chamber detects this, and the CO2 concentration can then be calculated. Photoacoustic NDIR sensing allows for much more miniaturisation of the measurement chamber. Furthermore, because sound waves are omnidirectional, the relative position of the emitter and microphone is unconstrained. Thus, photoacoustic NDIR sensors are typically more mechanically and thermally robust.
How to control fresh air supply?
This sensor's output can operate an EC fan, an AC fan speed controller or a damper actuator directly. The output value varies proportionally in function of the measured temperature, humidity and CO2 concentration. When more fresh air is required, the sensor will increase the fan speed or open the damper.
Easy to connect
The cage clamp terminal blocks simplify wiring and installation. They eliminate the need for routine maintenance and ensure a reliable contact for solid or stranded wires. This sensor can be powered by either 24 V DC or 24 V AC. It is designed for a three-wire connection. The output ground (GND) is internally connected to the supply voltage ground (V-). Make sure not to connect this common ground to any other DC-powered devices.
The cage clamp terminal blocks simplify wiring and installation. They eliminate the need for routine maintenance and ensure a reliable contact for solid or stranded wires. This sensor can be powered by either 24 V DC or 24 V AC. It is designed for a three-wire connection. The output ground (GND) is internally connected to the supply voltage ground (V-). Make sure not to connect this common ground to any other DC-powered devices.
This sensor requires very little configuration. It is almost directly usable once it has been installed. Temperature and relative humidity are often region and season specific. These parameters are still adjusted to the correct values during installation. The other default settings will be suitable for most applications. However, they can also be adjusted via the respective Modbus registers if necessary. A different output type, for example, can be selected to make it compatible with other devices: 0-10 VDC; 0-20 mA; 0-100% PWM; Modbus RTU. The light levels of the LEDs used for status indication are adjustable and you can choose to deactivate one or more measurement values. The Modbus register map provides an exhaustive list of all programmable settings.
Self-calibrating to compensate sensor drift
The ABC logic self-calibrating algorithm is by default enabled. This algorithm is designed to be used in applications where CO2 concentrations will drop to outside ambient conditions (400 ppm) at least one time (15 minutes) in a 7day period, which is typically seen during unoccupied periods. The sensor will reach its operational accuracy after 25 hours of continuous operation at a condition that it was exposed to ambient reference levels of air at 400 ppm ± 10 ppm CO2.
Wall mounting
The enclosure offers an IP30 protection against ingress of dust and moisture. It can be mounted on a wall indoors. To ensure optimal performance, it should be protected from direct sunlight.
∞ Monitoring air quality
The enclosure offers an IP30 protection against ingress of dust and moisture. It can be mounted on a wall indoors. To ensure optimal performance, it should be protected from direct sunlight.
∞ Monitoring air quality
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