.webp "Duct carbon dioxide sensor")
.webp "Duct carbon dioxide meter")
.webp "Duct carbon dioxide transmitter")
.webp "Duct carbon dioxide detector")
.webp "Duct carbon dioxide HVAC sensor")
.webp "Duct carbon dioxide HVAC transmitter")
EU declaration conformity
Duct CO2 sensor | Humidity protection | 24 V AC
Product description
This is a duct CO2 sensor for agricultural use. It has a coating to provide extra protection against humidity. It has an extremely broad CO2 measurement range of 0 - 10.000 ppm.
The power supply voltage is either 24 V AC or 24 V DC. It measures temperature, relative humidity, and CO2 levels. The measured values are communicated via three analogue outputs and Modbus RTU. The CO2 sensor element can be replaced if necessary. Modbus RTU can be used to change the measurement ranges and other settings.
Additional specifications and description
CO2 measurements in air ducts
Animals and people produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the amount of fresh air supplied. In many applications, the CO2 sensor measurement is used to control the ventilation system. This HVAC sensor measures temperature, relative humidity and CO2 in air ducts. Based on the temperature and humidity, the dew point is calculated. This sensor will function best if it is installed in a straight section of the air duct. Avoid installation in turbulent air zones nearby filters, fans, cooling coils, etc. Position the sensor correctly with respect to the airflow direction. Please consult the mounting instructions for more detailed information.
Animals and people produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the amount of fresh air supplied. In many applications, the CO2 sensor measurement is used to control the ventilation system. This HVAC sensor measures temperature, relative humidity and CO2 in air ducts. Based on the temperature and humidity, the dew point is calculated. This sensor will function best if it is installed in a straight section of the air duct. Avoid installation in turbulent air zones nearby filters, fans, cooling coils, etc. Position the sensor correctly with respect to the airflow direction. Please consult the mounting instructions for more detailed information.
Coating to provide extra protection against humidity
The electronic components and the PCB of this duct transmitter are treated with a coating to provide extra protection against humidity. The range of the CO2 measurement can be set in the range of 0 - 10.000 ppm. That range is wider than that of the standard CO2 sensors. This makes the sensor particularly suitable for the agricultural sector or applications with high humidity.
NDIR sensor technology
NDIR or Non-dispersive Infrared technology is used to measure the CO2 level. This technology offers a low life-cycle cost and a precise and stable long-term operation.
Easy to use
This sensor requires very little configuration. It is almost directly usable once it has been installed. Temperature and relative humidity are often region- and seasonal-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 V DC; 0-20 mA; 0-100% PWM; Modbus RTU.
3-wire connection
This sensor has three analogue outputs. Each of them transmits one of the measured values. E.g. by default, output 1 will transmit 0 V at 0 °C and 10 V at 50 °C. Each output value varies proportionally in function of the measured temperature, humidity or CO2 concentration. The measured temperature is available via output 1, relative humidity via output 2 and CO2 concentration via output 3. This sensor can be supplied with 24 V DC or with 24 V AC. It is intended for 3-wire connection. The ground of the output (GND) is internally connected to the ground of the supply voltage (V-). Make sure not to connect this common ground to other devices that are powered by a DC voltage.
This sensor has three analogue outputs. Each of them transmits one of the measured values. E.g. by default, output 1 will transmit 0 V at 0 °C and 10 V at 50 °C. Each output value varies proportionally in function of the measured temperature, humidity or CO2 concentration. The measured temperature is available via output 1, relative humidity via output 2 and CO2 concentration via output 3. This sensor can be supplied with 24 V DC or with 24 V AC. It is intended for 3-wire connection. The ground of the output (GND) is internally connected to the ground of the supply voltage (V-). Make sure not to connect this common ground to other devices that are powered by a DC voltage.
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 once (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.
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 once (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.
Air ducts
The enclosure is optimized for CO2 measurements in air ducts. It offers an IP54 protection against ingress of dust and moisture. The sensor element is integrated in the probe of the duct sensor. This probe has an opening to have a direct contact between the air flow and the sensor element. The sensor probe offers an IP20 protection.
∞ Monitoring air quality
The enclosure is optimized for CO2 measurements in air ducts. It offers an IP54 protection against ingress of dust and moisture. The sensor element is integrated in the probe of the duct sensor. This probe has an opening to have a direct contact between the air flow and the sensor element. The sensor probe offers an IP20 protection.
∞ Monitoring air quality
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