Quantitative measuring system for combustible gas with audible t

Details Quantitative measuring system for combustible gas with audible t Quantitative measuring system for combustible gas with audible t

1978-02-23

1979-09-04

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

340634, G08B 1710, G01N 3100

Patent

active

041663802

ABSTRACT:
The instrument uses a semiconductor gas sensor element energized with a regulated voltage source and placed in the atmosphere to be tested to generate a signal representative of the concentration of natural gas in the air. A meter displays the signal to determine whether the area is hazardous, and a variable repetition rate blocking oscillator feeding a speaker is responsive to the signal for generating an audible tick rate useful in locating a leak. The instrument is light-weight, portable, easy to use and intended to comply with industry standards as an intrinsically safe instrument.

REFERENCES:
patent: 2786350 (1957-03-01), Johnson
patent: 3427862 (1969-02-01), Hubner
patent: 3482233 (1969-12-01), Ogg
patent: 3860919 (1975-01-01), Aker
patent: 3877291 (1975-04-01), Hoppesch et al.
patent: 3906473 (1975-09-01), Le Vine
patent: 3950739 (1976-04-01), Campman
patent: 4004452 (1977-01-01), Logothetis et al.

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