Compressed Air

Development of air quality sensors

The project aims to reduce the energy consumed by room-air control systems by using air quality sensors. To this end, the project partners develop and test a new air quality sensor.


Purification and exchange of air in building interiors with the aim of upholding work health and safety is often realised by means of continuous circulation of large air masses, which consumes enormous amounts of energy. Using air quality sensors can substantially reduce the energy required for provision of a pleasant room climate and sufficient room air quality. The sensors serve to record the air components within a room and contribute to a requirements-controlled optimisation of climate control.

Metal oxide semiconductor sensors for air quality measurement were developed that possess the following properties: 

  • Sensors are available with almost identical basic signals.
  • Calibration of different sensors is not required.
  • The absolute signal changes as well as the change percentage compared with the initial signals of the various sensors in the case of air contamination are also almost identical.
  • The sensors are not susceptible to changes in inflow rate and can therefore be installed without problems in a climate control system's duct network.
  • The effect of humidity on the signals is negligible.
  • The sensors react very rapidly to changes in contamination.
  • Once the contamination has diminished, the initial value from prior to contamination is rapidly reached once more.
  • Signal noise has been reduced to a minimum.
  • The data generated is well suited for use as an input variable in control systems.

Project Participants

Implementing Institution

Universität Essen, Institut für Thermodynamik und Klimatechnik (IATK)

Cooperation partner

UST Umweltsensortechnik GmbH

ETR Elektronik Technologie Rump GmbH

Caverion Deutschland GmbH, Krantz Komponenten

Eurem GmbH

More Project Informations

Project number:  0329795A-D

Project period:  1997 - 2001

Project region:  Germany (North Rhine-Westphalia)

Project contact:

Herr Prof. Dr. Dipl.-Ing. Steimle

View Publication

Source:  German National Library of Science and Technology Hannover (TIB)