公开(公告)号：US20030167856A1

公开(公告)日：2003-09-11

申请号：US10092773

申请日：2002-03-07

Applicant: ABB Inc.

Inventor： Martin L. Tanaka

IPC: G01F001/37

CPC classification number: G01F1/363

Abstract: A flow sensor for an analytical instrument. The flow sensor can be used to detect the flow of a fluid such as purge gas in the instrument. The sensor can measure the fluid flow at an opening of the instrument enclosure. The sensor has first and second differential pressure switches connected in series. The sensor has a sealed chamber which is in the opening. Bordering the sealed chamber are first and second restrictors through which the fluid can flow. A sensing tube transfers the pressure in the sealed chamber to the first and second switches.

Abstract translation: 用于分析仪器的流量传感器。 流量传感器可用于检测仪器中诸如吹扫气体之类的流体流量。 传感器可以测量仪器外壳开口处的流体流量。 传感器具有串联连接的第一和第二差压开关。 传感器具有位于开口中的密封室。 与密封腔相邻的是流体可以流过的第一和第二限流器。 感测管将密封室中的压力传递到第一和第二开关。