Patent ID: 6022510
Filing Date: 2000-02-08
Classification: G01N

Abstract:
A gas sampling tube for flue-gas analysis comprising:a gas inlet constructed and adapted to receive a flue-gas sample;an elongate filter element downstream of said gas inlet and in fluid communication with said gas inlet for normally receiving gas from said gas inlet;a measured gas line downstream of said filter element and in fluid communication with said filter element for normally receiving gas from said filter element;a gas outlet downstream of said measured gas line;a single heater extending substantially the length of said filter element and said measured gas line for heating said filter element and said measured gas line;a cylindrical housing, said filter element being within said housing and being in the form of a hollow cylinder; anda closure plug at the inlet of said filter housing, said closure plug having ducts therein for directing gas outwardly, said filter element having an external diameter less than the internal diameter of said filter housing, to provide a space therebetween for receiving gas passing through said ducts, and said closure plug having a centering neck entered into and supporting said filter element.