Analyzer with compensation

Details Analyzer with compensation Analyzer with compensation

1988-05-18

1989-07-18

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2502521, 250352, G01N 2137

Patent

active

048496367

ABSTRACT:
The present invention pertains to an apparatus that is capable of correcting for inaccuracies caused by molecular collision broadening in analyzers. The apparatus includes an analyzer for analyzing a fluid. The analyzer is capable of producing an output signal corresponding to the fluid in the analyzer. The apparatus also includes a device for detecting molecular collision broadening in the fluid. The detecting device produces an output signal proportional to the molecular collision broadening. There is also a device for correcting inaccuracies in the analyzer output signal caused by molecular collision broadening. The correcting device is disposed to receive the analyzer output signal and the detecting device output signal, and is capable of producing an output signal corresponding thereto. Preferably, the detecting device includes a thermal conductivity cell and the correcting device is either a voltage control gain operational amplifier or a computer.

REFERENCES:
patent: 4110619 (1978-08-01), Zorner
patent: 4423739 (1984-01-01), Passaro et al.
patent: 4598201 (1986-07-01), Fertig et al.
Hill et al. "Cross-Sensitivity Effects in Non-Dispersive IR Gas Analyzers Using Condenser Microphone Detectors" J. Sci. Instrum. 1967 vol. 44, pp. 189-194.

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