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Grey plastic enclosure with duct probe and black mounting flange
Grey plastic enclosure with duct probe and black mounting flange
Grey plastic enclosure with duct probe and black mounting flange
Grey plastic enclosure with cable gland
Grey plastic enclosure with duct probe and black mounting flange
Grey plastic enclosure with duct probe and black mounting flange
Electronic circuit board with components in a plastic enclosure

Duct temperature | humidity | CO2 controller, 24 VDC


Product description

Duct CO2 controller to measure temperature, relative humidity and CO2 (carbon dioxide). The supply voltage is 24 VDC. The sensor algorithm controls the single analogue output based on the measured values. This single output can be used to directly control an EC fan, an AC fan speed controller or a damper actuator. The output type can be selected. All measurements and the output value are available via Modbus RTU. The CO2 sensor element is replaceable. All settings can be adjusted via Modbus RTU.


Article code DCMFF-2R
GTIN 0.540.100.300.067.0
Category Duct CO2 sensors
Available
Current stock 14 U.
Factory lead time 4 Week(s)
Documents

Additional specifications and description

 
Optimised for air ducts
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 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.
 
Demand based EC fan control
The sensor algorithm controls one output. This output can control an EC fan, an AC fan speed controller or a damper actuator. The output value varies proportionally in function of the measured temperature, relative humidity and CO2 level. E.g. as temperature, relative humidity or CO2 level approaches their maximum limit, fan speed will increase or the damper will open. 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 doesn't require configuration. Once installed, it is ready to use. The default settings will do for most applicationsIf necessary, the settings can be adjusted via Modbus RTU. For example, a different output type can be selected to make it compatible with other devices: 0-10 VDC / 0-20 mA / 0-100 % PWM. The Modbus register map provides a complete overview of all adjustable settings.
 
4-wire connection
The supply voltage is 24 VDC. The ground terminals of the power supply (V-) and output (GND) are internally not connected. This means that a 4-wire cable is required to connect this sensor. Most 24 VDC power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation
 
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.
  
Air ducts
The enclosure is optimised 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.      
 
 
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