公开(公告)号：US09746363B2

公开(公告)日：2017-08-29

申请号：US14516727

申请日：2014-10-17

Applicant: Xtralis Technologies Ltd.

Inventor： Kemal Ajay ,  Arjun Vinoo Caprihan ,  Michael Rezny

IPC: G01F1/66 ,  G01N1/22 ,  G01N1/26 ,  G01N1/28 ,  G08B17/10 ,  G01F1/74 ,  G01N29/024 ,  G01N15/00 ,  G01N15/14 ,  G08B17/113

CPC classification number: G01F1/74 ,  G01F1/66 ,  G01F1/667 ,  G01N1/2205 ,  G01N1/2273 ,  G01N1/26 ,  G01N29/024 ,  G01N2015/0046 ,  G01N2015/1486 ,  G01N2291/0217 ,  G01N2291/02408 ,  G01N2291/02836 ,  G08B17/10 ,  G08B17/113

Abstract: A method of detecting one or more blocked sampling holes in a pipe of an aspirated smoke detector system. The method includes ascertaining the base flow of fluid through a particle detector using a flow sensor; monitoring subsequent flow through the particle detector; comparing the subsequent flow with the base flow; and indicating a fault if the difference between the base flow and the subsequent flow exceeds a predetermined threshold.