公开(公告)号：US20230358646A1

公开(公告)日：2023-11-09

申请号：US18139695

申请日：2023-04-26

Applicant: TSI Incorporated

Inventor： Yilmaz Bayazit ,  Tyler Anderson

IPC: G01N1/24 ,  G05D7/06 ,  G01N1/22

CPC classification number: G01N1/24 ,  G05D7/0676 ,  G01N1/2273

Abstract: Disclosed herein are systems and methods for measuring and controlling a flow rate through a particle counter or active air sampler. As disclosed herein, a flow is created within a conduit fluidly connected to an instrument at a first velocity. An inlet pressure at an inlet of the instrument and an ambient pressure proximate the instrument are measured. The flow rate through the instrument is determined based on a pressure differential between the inlet pressure and the ambient pressure. The flow rate is increased or decreased when the flow rate is outside a flow rate range.

公开(公告)号：US10520414B2

公开(公告)日：2019-12-31

申请号：US15552396

申请日：2016-02-23

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

公开(公告)号：US10488314B2

公开(公告)日：2019-11-26

申请号：US15552396

申请日：2016-02-23

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

公开(公告)号：US20230366709A1

公开(公告)日：2023-11-16

申请号：US18028608

申请日：2021-09-27

Applicant: TSI Incorporated

Inventor： Yilmaz Bayazit ,  Tyler Anderson ,  Richard J. Remiarz

IPC: G01F1/44 ,  G01N1/24 ,  G01F1/42 ,  G01F1/36 ,  G01N1/22 ,  G01N15/14

CPC classification number: G01F1/44 ,  G01N1/24 ,  G01F1/42 ,  G01F1/363 ,  G01N1/2273 ,  G01N15/1459 ,  G01N2015/1486 ,  G01F15/063

Abstract: Disclosed herein are systems and methods for measuring and controlling a flow rate through a particle counter or active air sampler. As disclosed herein, a fluid flows through a venturi tube and an orifice in the system at a predetermine velocity. A pressure differential between an inlet of the instrument and a throat section of the venturi tube is measured. The flow rate through the system can be determined based on the pressure differential and an intensive property of the fluid. An alarm can be activated when the flow rate is outside of a flow rate range.

公开(公告)号：US10914667B2

公开(公告)日：2021-02-09

申请号：US16664637

申请日：2019-10-25

Applicant: TSI Incorporated

Inventor： Sreenath Avula ,  Richard Remiarz ,  George John Chancellor ,  Tyler Anderson ,  Daniel C. Bjorkquist ,  Robert Caldow ,  Sean Morell ,  Frederick R. Quant ,  Susanne V. Hering ,  Gregory S. Lewis

IPC: G01N15/06

Abstract: Various embodiments include methods and systems for reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into multiple wicks used for transporting separate portions of an aerosol sample flow, with the wicks extending from a wick stand on a first end to a flow joiner on a second end, combining particles from the separate portions of the aerosol sample flow into a single aerosol stream within the flow joiner prior to transporting the combined aerosol sample stream into a particle detection chamber within the CPC, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water in a collection reservoir, and after receiving a signal corresponding to the excess volume of water, draining the excess volume of water from the collection reservoir. Other methods, systems, and apparatuses are disclosed.