Thermal conductivity detector

Details Thermal conductivity detector Thermal conductivity detector

1987-03-05

1989-03-21

Levy, Stewart J.

Measuring and testing

Gas analysis

Gas chromatography

73 27R, G01N 3108

Patent

active

048132675

ABSTRACT:
A thermal conductivity cell is described whose elements are well protected against short term temperature fluctuations, changes in flow rates, leaks, and vapor pressures of construction materials. The sample and reference chambers are formed within a relatively large copper block with a controlled thermal time constant. The thermal elements are isolated from the gas flow paths by porous metal plugs which are thermally "clamped" to the block. Element feed-throughs are potted in thermally conductive epoxy to minimize the effect of temperature gradients.

REFERENCES:
patent: 2585959 (1952-02-01), Minter
patent: 2687036 (1954-08-01), Minter
patent: 3097520 (1963-07-01), Thompson
patent: 3481179 (1969-12-01), Howarth
patent: 3603134 (1970-03-01), Norem
patent: 3607084 (1971-09-01), Mackey
patent: 3687631 (1972-08-01), Zegel
patent: 3791195 (1974-02-01), Loe

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