Patent ID: 6215406
Filing Date: 2001-04-10
Classification: G01N,G08B

Abstract:
An apparatus for detecting ignited flammable gas in a conduit comprising:a sensor body of elongated, cylindrical shape having a gas inlet at one end for connecting to a gas supply source and a gas outlet at an opposite end for connecting to a process machine,at least one perforated isolator plate dividing a cavity in said sensor body forming at least two sub-cavities in said sensor body, said at least one perforated isolator plate slows down the propagation of an ignited flammable gas that feeds back into said sensor body through said gas outlet, andat least one optical sensor mounted at said gas inlet for sensing an ignited flammable gas in the cavity of said sensor body and for sending a signal to a controller for shutting off said gas source for said flammable gas.