General Description via air quality sensor VOC
Accessories
Application
Air quality sensors are used to determine the air quality on the basis of a mixed gas sensor/VOC sensor (volatile organic compounds).
They are used
– for measuring the air quality in offices, hotels, meeting and conference rooms, flats, shops, restaurants etc.
– for quantitative assessment of interior air pollution with contaminated gases (cigarette smoke, body odours, breathing air, solvent vapours,
emissions from building parts and cleaning agents).
– for adjustable sensitivity with regard to the maximum air contamination to be expected
– for demand-dependent ventilation of rooms, this is possible with energy savings, as air exchange only takes place when the air is
polluted.
Due to the linearisation and the high operating temperature, the air quality sensor achieves a low drift with respect to humidity as well as good stability; the sensor is automatically self-calibrated.
The air quality sensor does not measure the concentration of a single gas, but evaluates the mixed gas, i.e. the measurement of the gas concentration is not selective. Therefore, it is also not possible to specify the gas concentration in the unit ppm.
Detectable gases: Mixed gas, vapours of alkanols, cigarette smoke, automobile exhaust, breathing air, combustion smoke (from wood, paper, plastics). VOCs also include, for example, compounds of the substance groups of alkanes, alkenes, aromatics, terpenes, halocarbons, esters, aldehydes and ketones as well as naturally occurring VOCs such as terpenes and isoprene. VOC gases from building chemical products, such as paints, adhesives or sealants, furnishings, cleaning and maintenance products, office chemicals and carpets. The unit can
be readjusted by the user by means of the zero and full scale controls, observing the calibration instructions. The service life of the sensor depends on the type of load and the gas concentration.
The output signal used to define the switching point in the controller is dependent on the various chemical gases, depending on the desired air quality.
Please note:
Rooms for larger crowds (schools, cinemas, offices, etc.) are recommended to use CO2 sensors.
