KNX AQS-B-UP (discontinued item)

KNX CO2 Sensor with Display and Buttons

The Air Quality Sensor KNX AQS-B-UP measures the CO2 concentration in the room. The sensor can receive an external CO2 value via the bus and process it with the own data to an overall value (mixed value, e. g. room average).

The KNX AQS-B-UP offers two push buttons that can be used as free programmable bus push buttons.
The KNX AQS-B-UP provides four switching outputs with adjustable threshold values. The switching outputs and further communication objects can be linked by AND and OR logic gates. Additionally, an integrated actuating variable comparator can compare and output values that are received via communication objects.
An integrated PI controllers allows for control of ventilation depending on CO2 concentration.

The integrated display shows the own values and data received from the bus (e. g. date, time). The housing is completed with a frame of the switching series installed in the building and thus merges with the interior.


N° 70229 KNX AQS-B-UP, white (discontinued item)

  • KNX AQS-B-UP, white (70229) KNX AQS-B-UP, white (70229)
  • Measurement of CO2 concentration of the air
  • Mixed value from own measured value and external value (proportions can be set in percentage)
  • Display 1-3 rows (own values or values received from the bus)
  • 2 bus push buttons
  • PI controller for ventilation depending on CO2 concentration: dehumidification/humidification (one step) or dehumidification (one or two step)
  • 4 switching outputs with adjustable threshold values (Threshold values can be set by parameter or via communication objects)
  • 8 AND and 8 OR logic gates with each 4 inputs. Every switching incident as well as 16 logic inputs (in the form of communication objects) may be used as inputs for the logic gates. The output of each gate may optionally be configured as 1 bit or 2 x 8 bits
  • 2 actuating variable comparators for output of minimum, maximum or avarage values. Each with 5 inputs (for values received via communication objects)
  • Configuration is made using the KNX software ETS
HousingPlastic material (partly lacquered)
Colours• White glossy (similar to RAL 9016 Traffic White)
•Aluminium matt
• Anthracite matt
• Special colours on request
MountingIn-wall (in socket Ø 60 mm, 42 mm deep)
Protection categoryIP 20
DimensionsHousing approx. 55 × 55 (W × H, mm),
mounting depth approx. 15 mm,
base plate approx. 71 × 71 (W × H, mm)
Total weightapprox. 72 g
Ambient temperatureOperation -10…+50°C, storage -20…+60°C
Ambient air humiditymax. 95% RH, avoid bedewing
Operating voltageKNX bus voltage
Bus currentmax. 10 mA
Data outputKNX +/- bus terminal plug
Communication objects 157
Measurement range CO20…2000 ppm