Air quality 26.03.2020 16:46 26.03.2020 16:46

The C-AQ-0006R module is used to monitor the air quality in the interior of buildings and replaces the older generation of modules C-AQ-0001R to C-AQ-0004R. Built-in sensors can measure carbon dioxide (CO2), relative humidity (RH), volatile organic compound (iVOC), cigarette smoke (SMOKE) and air temperature (T). Built-in autocalibration functions compensate for the long-term aging of key sensor components. If the module is permanently powered during operation, no further calibration is required. The iVOC sensor is an advanced sensor sensitive to volatile organic compounds typically contained in exhaled air, gaseous metabolic products of the human body and other gaseous pollutants such as formaldehyde, kitchen fumes, fumes from paints, varnishes, adhesives, cleaning agents, etc. The sensor therefore detects what is primarily ventilating. Thus, its function is close to the perception of air quality by the human sense of smell. The sensor output is calibrated as equivalent to a CO2 sensor with a range of 450 ÷ 2000 ppm. The mechanical design of the module allows its easy mounting on a standard installation box (with a mounting spacing of 60 mm).


The module is supplied in several type variants, differing in equipped with measuring sensors:

Designation Order number Equipped sensors


TXN 133 88.02 CO2                  (CO2 up to 5000 ppm) 
TXN 133 88.07 iVOC
TXN 133 88.11 RH + T
TXN 133 88.16 SMOKE


Tab. 1 Basic Parameters C-AQ-0006R

Measuring input CO

Sensor principle infrared radiation (NDIR)
Range (by type) 0÷2000 ppm / 0÷5000 ppm 
Resolution 1 ppm
Accuracy ± 35 ppm + ±5 % of value
Time of the sensor preparing for function max. 1 min
Jump response(90%) 80s

Measuring input RH

Sensor principle capacitive polymer
Range 0 ÷ 100 % RH
Resolution 0,1 % RH
Accuracy ±3,5 % RH (for RH 20 ÷ 80%)


±6 % RH    (pro RH 0 ÷ 100%)

Measuring input iVOC1)

Range 450 ÷ 2000 ppm
Resolution 1 ppm

Measuring input SMOKE

Range 0÷10000 ppb (parts per bilion) 
Resolution 1 ppb

Temperature input T

Range 0 ÷ +40 °C
Resolution 0,1 °C
Accuracy ±0,4 °C

Power supply

Power supply and communication 24 V (27 V) from CIB bus
Nominal consumption 80 mA
Dimensions and Weight
Dimensions 90 × 80 × 31mm
Weight 100g
Operating and installation conditions
Working temperature 0 ÷ +50 °C
Working humidity 5 ÷ 95 % non-condensing
Storage temperature -20 ÷ +60 °C
Degree of IP protection IEC 529 IP20
Working position vertical
Installation on the wall, screw pitch 60 mm 
Connection screw terminals
Wire cross section max. 1.5 mm2
Sensor life min. 10 years
Sensor calibration automatic2)

1) iVOC/SMOKE ppm corresponds to CO2 ppm of exhaled air

2) active only when the module is permanently powered, calibration period approx. 21 days

Fig. 1 CIB connection to the terminals of the C-AQ-0006R module

Fig. 2 view of the front cover of the module