Chemistry: analytical and immunological testing – Optical result
Patent
1994-03-14
1996-04-23
Snay, Jeffrey R.
Chemistry: analytical and immunological testing
Optical result
436171, 422 83, 422 84, 2502521, G01N 2161
Patent
active
055102697
ABSTRACT:
An automatic calibration technique for a gas analyzer includes applying electrical energy to a source that is different from the level used to detect gas concentration in order to produce a different level of radiation from that used to detect gas concentration. The different level is applied with a non-absorbing gas in the gas sample chamber. The detector output at the reduced level is resolved to a calibration factor. The instrument can be linearized by repeating the calibration procedure at multiple different levels of reduced source radiation. In one embodiment, source assembly (26) is provided that includes a plurality of infrared emitters (36) to which is applied modulated electrical energy in a timed sequence in order to produce output levels for three component gas concentrations. A filter (56) between each one of the sources (36) and a detector (50) pass radiation at an absorption line of one of the component gases.
REFERENCES:
patent: 2718597 (1955-09-01), Heigl et al.
patent: 3790797 (1974-02-01), Sternberg et al.
patent: 3860818 (1975-01-01), Stalder et al.
patent: 3861809 (1975-01-01), Hall, Jr.
patent: 3887473 (1975-06-01), Sternberg et al.
patent: 3898462 (1975-08-01), Ishida et al.
patent: 3923403 (1975-12-01), Harklau
patent: 4011859 (1977-03-01), Frankenberger
patent: 4042333 (1977-08-01), Dell et al.
patent: 4050823 (1977-09-01), Frankenberger
patent: 4069420 (1978-01-01), Ross
patent: 4075481 (1978-02-01), Stoft et al.
patent: 4126396 (1978-11-01), Hartmann et al.
patent: 4167665 (1979-09-01), Johns et al.
patent: 4346296 (1982-08-01), Passaro et al.
patent: 4348115 (1982-09-01), Walker et al.
patent: 4358679 (1982-11-01), Lipoma
patent: 4370553 (1983-01-01), Waycaster et al.
patent: 4381153 (1983-04-01), Bohl et al.
patent: 4423739 (1984-01-01), Passaro et al.
patent: 4480190 (1984-10-01), Burough et al.
patent: 4673812 (1987-06-01), Yoneda
patent: 4678914 (1987-07-01), Melrose et al.
patent: 4687934 (1987-08-01), Passaro et al.
patent: 4694173 (1987-09-01), Wong
patent: 4730112 (1988-03-01), Wong
patent: 4756622 (1988-07-01), Wong
patent: 4787750 (1988-11-01), Nelson et al.
patent: 4794258 (1988-12-01), Fetzer et al.
patent: 4795240 (1989-01-01), Wong et al.
patent: 4914719 (1990-04-01), Conlon et al.
patent: 5013920 (1991-05-01), Asano et al.
patent: 5039855 (1991-08-01), Kemeny et al.
patent: 5060505 (1991-10-01), Tury et al.
patent: 5160843 (1992-11-01), Lehto
Jones, T. A.; Firth, J. G.; and Jones, A., "A Simple Infrared Gas Analyzer," Journal of Physics E: Scientific-Instruments, vol. 4, pp. 792 and 793, 1971.
Johnston, Sean F., "Gas Monitors Employing Infrared LEDs," Meas. Sci. Technol., No. 2, pp. 191-195, Feb., 1992.
Mindock, Ralph M. and Allen, David M., "Miniature NDIR Gas Sensors," ISA Proceedings, vol. 43, pp. 1071-1081, 1988.
Armstrong Walter I.
Black Karl H.
Sensors, Inc.
Snay Jeffrey R.
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