Modbus Duct Sensor for CO2 Measurements ANDKACO2-MD records the ambient air’s CO2 concentration in air ducts of air-conditioning systems. The ANDKACO2-MD converts the values measured in the ranges of optionally 0-2000 ppm or 0-5000 ppm into a linear 0-10 V output signal. The CO2 value is measured via the NDIR sensor, which is able to compensate for possible pollution with the help of its 2-ray measuring principle. Optionally, our ANDKACO2-MD is available with an additional sensor for measuring temperature and humidity.
The duct CO2 Modbus sensor can also be installed in high humidity (up to 100%) in the absence of condensation. In the case of condensation, measurements of CO2 in the duct would be incorrect as the liquid would close the slots of the sensor.
Additional options for sensor ANDKACO2-MD (optional additions; surcharges):
- VOC sensor (only 0-10V version),
- temperature and humidity sensor
- mounting flange,
- in-casing integrated LED display – showing real-time measured values,
- relay.
Alternative sensor versions:
- Standard adtive Duct Sensor for CO2 (Carbon Dioxide) Measurements ANDKACO2.
Product number
Product number: ANDKACO2-MD
Technical Specifications
Power supply: | 12 … 34 VAC/VDC |
Power consumption: | < 9 mA |
Electrical connection: | Screw clamps |
Output: | 0…10 V or 4-20mA |
Sensor element: | (NDIR) sensor with automatic background calibration |
Measuring range CO2: | 0 … 2000 ppm / 0 … 5000 ppm |
Accuracy: | < ± (50ppm 2% of scale reading) at 25°C and 1013 mbar |
Optional: | |
Temperature: | 0 … 10 V or 4-20 mA |
Accuracy: | ± 0,2 K + max 3% full scale |
Humidity: | 0…10 V or 4-20mA |
Accuracy: | < 3% at 25°C between 10…90% r.h. |
Operating temperature: | 0°C…+50°C |
Humidity: | 10…95% r.h. |
Protection class: | IP65 (Housing) |
Housing: | Plastic |
Mounting equipment (included): | Mounting flange |
How do levels of ppm affect human well-being?
Level od ppm | Effects | Effects |
> 40.000 | ⬤ | serious damage / deadly |
5000 | ⬤ | dangerous on prolonged exposure |
2000 – 5000 | ⬤ | negative health effects |
1200 | ⬤ | ventilation necessary |
1000 | ⬤ | ventilation desirable |
800 | ⬤ | accepted level |
450 – 600 | ⬤ | healthy indoor climate |
250 – 350 | ⬤ | healthy outside air level |
Algorithm: CO2 and VOC levels comparison over time
Additional info for ANDKACO2-MD
Protocol: | Modbus (ASCII/RTU), RS485 |
Power supply: | 12-34 VAC/VDC |
Dimensions: | 75 x 69 x 44 mm |
Housing: | PA6, Color RAL 9011 |
Protection class: | IP65 |
Sensor: | Duct Mounted Sensor |