The Air Quality Sensor KNX AQS-UP basic 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-UP basic 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.

Functions and Operation:
Measurement of CO2 concentration of the air
Mixed value from own measured value and external value (proportions can be set in percentage)
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 8 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
Configuration is accomplished by means of the KNX software ETS

Technical Data:
Housing Plastic material (partly lacquered)
Colours White glossy (similar to RAL 9016 Traffic White)
Aluminium matt
Anthracite matt
Stainless steel
Special colours on request
Mounting In-wall (in socket Ø 60 mm, 42 mm deep)
Protection category IP 20
Dimensions Housing approx. 55 × 55 (W × H, mm),
mounting depth approx. 15 mm,
base plate approx. 71 × 71 (W × H, mm)
Total weight approx. 72 g
Ambient temperature Operation -10 +50°C, storage -20 +60°C
Ambient air humidity max. 95% RH, avoid bedewing
Operating voltage KNX bus voltage
Bus current max. 10 mA
Data output KNX +/- bus terminal plug
Communication objects 133
Measurement range CO2 0 2000 ppm