Invensense, Inc.

Sensirion Ag

Stefan Thiele

Chung-Hsien Lin

Tsung Lin Tang

Rene Hummel

Wang Shen Su

Stefan Kostner

Johannes Schumm

Thomas Kraehenbuehl

Andreas Reinhard

Chia Min Lin

Zeljko Mrcarica

Frank Gütle

Ulrich Leidenberger

Mark Hornung

Nicolas Moeller

Chia Ming Lin

Patrick Leidenberger

Frank GÜTLE

Tsung-Lin Tang

Chia-Min Lin

Wang-Shen Su

A duct probe () for sampling a fluid from a main fluid flow (Fm) in a duct () defines an elongated supply channel () n elongated discharge channel (). The supply channel has at least one inflow opening () for diverting a partial flow (Fp) from the main fluid flow into the supply channel, and the discharge channel has at least one outflow opening for returning the partial flow from the discharge channel into the main fluid flow after it has passed an environmental sensor (). The duct probe further comprises at least one compensation opening () that connects the supply channel and the discharge channel in a region that is located between their closed and open ends. By the presence of the compensation opening (), a jet flow (Fj) is created, which acts to reduce a pressure difference between the supply channel and the discharge channel when the duct probe is exposed to the main fluid flow (Fm).

Duct sensor with duct probe for sampling a fluid from a duct and method of operation

A particulate matter sensor device comprising an enclosure () that comprises a flow inlet (), a flow outlet () and a flow channel () extending therebetween, a radiation source for emitting radiation into the flow channel () for interaction of the radiation with the particulate matter in the flow () of an aerosol sample when guided through the flow channel (), a radiation detector () for detecting at least part of said radiation after interaction with the particulate matter. The sensor device comprises a flow modifying device () arranged upstream of the radiation detector () and/or of the radiation source () for modifying the flow () for reducing particulate matter precipitation onto the radiation detector () and/or onto the radiation source () and/or the channel wall sections in close proximity to the detector () and/or source (). The invention also relates to a method of determining parameters of particulate matter in an aerosol sample by using such a particulate matter sensor device.

Particulate matter sensor device

A particulate matter sensor device comprises 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, and a radiation detector () for detecting at least part of said radiation after interaction with the particulate matter. The sensor device comprises a flow modifying device () arranged upstream of the radiation detector and/or radiation source so as to reduce particulate matter precipitation onto the radiation detector, the radiation source and/or the channel wall sections in their proximity. The invention also relates to a method of determining parameters of particulate matter in an aerosol sample by using such a particulate matter sensor device.

A sensor includes a deformable membrane that deflects in response to a stimuli. The sensor further includes a capacitive element coupled to the deformable membrane. The capacitive element is disposed within an enclosed cavity of the sensor. The capacitive element changes capacitance in response to the deformable membrane deflecting. The capacitive element comprises a getter material for collecting gas molecules within the enclosed cavity.

Pressure sensor

A pressure sensor comprises a deformable membrane deflecting in response to pressure applied, a first stationary electrode, and a second electrode coupled to the deformable membrane, for determining a change in a capacitance between the first and the second electrode in response to the pressure applied. At least one of the first and the second electrode comprises a getter material for collecting gas molecules.

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Stäfa, Switzerland

Stefan Thiele