B5.1 Evaluation of commercial metal oxide gas sensors for indoor aeration control
- SMSI 2020
(did not take place because of Covid-19 virus pandemic)
- SMSI 2020 - Sensors and Instrumentation
- B5 Air Quality Monitoring
- J. Zosel, M. Mertig - Kurt-Schwabe-Institut für Mess- und Sensortechnik Meinsberg e.V., Waldheim (Germany), D. Deininger - Renesas Electronics America Inc., Longmont (USA), R. Schreiber, C. Meyer - Renesas Germany GmbH, Dresden (Germany)
- 127 - 128
This work reports on measurements with commercially available metal oxide gas sensors (MOX-GS) in different indoor environments together with infrared CO2 gas sensors (IR-CO2-GS). From the temporal courses of the MOX-GS a time-dependent CO2 concentration is estimated (e(CO2)) by sensor-specific algorithms, which is compared subsequently with the CO2 concentration, measured with the IR-CO2-GS. That calculation is based on the hypothesis that humans exhale volatile organic compounds (VOC) parallel to CO2, which stimulate the MOX-GS. Therefore, a correlation between VOC and CO2 concentrations can be derived in populated meeting rooms and offices. Measurements in rooms of different sizes and different numbers of attendees confirmed this hypothesis and indicate the possibility to control air condition (HVAC) systems with e(CO2)-values as input signals.