Lloyd R Mchie

US Patent:

51161370, May 26, 1992

Filed:

Mar 29, 1990

Appl. No.:

7/501130

Inventors:

Lloyd McHie - South Holland IL

Assignee:

Institute of Gas Technology - Chicago IL

International Classification:

G01K 1302
G01K 114

US Classification:

374132

Abstract:

An apparatus and process for a temperature measuring pyrometer probe that measures gas temperatures above the melting point of conventional thermocouple material. The apparatus is used to calculate radiation heat losses and compensate for pneumatic cooling from the thermocouple junction of the pyrometer probe. The pyrometer probe has an inner hollow body which defines an inner chamber. The inner hollow body has an open end and the inner chamber is in communication with ambient gas surrounding the pyrometer probe. The inner hollow body is mounted within an outer hollow body and such mounting defines cooling channels. The cooling channels accommodate fluid flow which cools the inner hollow body. The ambient gas is directed into a converging-diverging nozzle, mounted within the inner hollow body, toward a thermocouple junction. The converging-diverging nozzle has a wall suction channel through which a boundary layer of the ambient gas is drawn away from the thermocouple junction.