Patent ID: 11940370
Assignee: SENSIRION AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 22:
23. A particulate matter sensor device for detecting or characterizing particulate matter in a flow of an aerosol sample guided through the particulate matter sensor device, comprising:
an enclosure, the enclosure comprising a flow inlet and a flow outlet and defining a flow channel for guiding the flow of the aerosol sample through the particulate matter sensor device from the flow inlet to the flow outlet;
a radiation source arranged and configured to emit radiation into the flow channel for interaction of the radiation with at least some of the particulate matter in the flow of the aerosol sample;
a radiation detector arranged and configured to detect at least part of said radiation after interaction with the particulate matter;
a flow modifying device configured to at least locally modify the flow of the aerosol sample, the flow modifying device comprising an additional flow opening for creating an additional flow into the flow channel, and
a circuit board having at least one through-hole,
wherein the radiation detector is mounted on the circuit board, and
wherein the particulate matter sensor device is configured such that the at least one additional flow traverses the circuit board through the at least one through-hole and overflows the radiation detector after the additional flow has traversed the circuit board.