Patent ID: 11898953
Assignee: SENSIRION AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 29:
30. A particulate matter sensor device comprising:
an enclosure defining a flow channel;
a radiation source for emitting radiation into the flow channel for interaction of the radiation with particulate matter in an aerosol sample in the flow channel;
a radiation detector for detecting at least part of said radiation after interaction with the particulate matter;
a circuit board, wherein the radiation detector is mounted on the circuit board;
an additional flow opening for creating an additional flow into the flow channel, wherein the additional flow opening is configured to create the additional flow in such a manner that the additional flow overflows the radiation detector, thereby sheathing the radiation detector; and
an environmental sensor for determining at least one environmental parameter, the environmental sensor being disposed in a flow path of the additional flow upstream of the additional flow opening,
wherein the radiation detector is arranged in a flow path of the additional flow downstream of the environmental sensor.