Abstract: An air quality monitoring system is provided. The system generally comprises a controller, a multiplexor, and a sensor pack having at least one sensor configured to measure an air quality metric of the sample. The multiplexor is configured to receive samples from the plurality of different rooms at a plurality of multiplexor inlets. The multiplexor may further include a rotatable core that defines a first core inlet. The multiplexor and the sensor pack collectively define a sensor airflow line that fluidly couples the multiplexor inlet associated with the selected room, the first core inlet, and a remote test environment within the sensor pack. The multiplexor further comprises a power unit in electrical communication with the rotatable core and that, when instructed by the controller, rotates the rotatable core between positions thereby selecting the alignment of the sensor airflow line with the multiplexor inlet of the selected room.

Abstract: An air quality monitoring system is provided. The system comprises a controller, a multiplexor, and a sensor pack. The sensor pack comprises a sensor pack housing, a first plurality of sensors disposed on a first sensor board having a first board sensing surface, a second plurality of sensors disposed on a second sensor board having a second board sensing surface, and a substrate disposed between the first sensor board and the second sensor board, wherein the respective sensors are configured to measure an air quality metric of the selected air sample. The sensor pack housing defines a sensor pack inlet and a sensor pack outlet. The substrate defines an air channel that extends from the sensor pack inlet to the sensor pack outlet. The first sensing surface and the second sensing surface are spaced apart by the substrate but are in fluid communication with the substrate and the air channel.