Light pipe and heater apparatus

Details Light pipe and heater apparatus Light pipe and heater apparatus

1985-01-09

1986-05-13

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

250343, G01N 3074

Patent

active

045878358

ABSTRACT:
A GC/IR system for analyzing the constituents of a gas sample is disclosed and claimed in which a floating light pipe assembly is disposed in a bore and troughs of a heater chamber in a heater assembly. The floating light pipe assembly has two transfer tubes and a light pipe tube that provide a completely chemically resistant path to the flow of a gas sample and carrier gas from a GC capillary column to a supplemental GC detector. The flow path is chemically inert since no contaminating sealants are used and substantially all of the flow path is gold plated. The light pipe assembly "floats" because it is allowed to thermally expand within the heater chamber so that high reflectivity in the IR region will be maintained as the light pipe assembly is being heated by the heater plates on opposite sides of the heater chamber.

REFERENCES:
patent: 4420690 (1983-12-01), Kuehl
patent: 4440013 (1984-04-01), Adams

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