Method for quantitatively determining a component of a gas flow

Details Method for quantitatively determining a component of a gas flow Method for quantitatively determining a component of a gas flow

1993-01-14

1994-06-21

Williams, Hezron E.

Measuring and testing

Gas analysis

With compensation detail

73 233, 7386302, 422 84, 128719, G01N 33497, G01N 122

Patent

active

053219724

ABSTRACT:
The invention relates to a method for quantitatively determining a gas component of a gas flow and an apparatus therefor. The apparatus includes a testing conduit having a throttle through which the gas flow flows. A sample conduit leading to the gas inlet of a gas sensor branches away from the testing conduit upstream of the throttle. The apparatus further includes a pressure sensor connected to the sample conduit, a valve connected to a gas outlet of the gas sensor and a control unit. The method of the invention is improved in that a defined quantity of gas can be supplied to the sensor without a pump being required. An improvement is achieved in that the control unit is so configured that: in a first step, the valve is opened; the gas volume is determined in a second step by computing the time integral of the signal of the pressure sensor; and, in a third step, the valve is closed after the throughflow of a pregiven gas volume or after a pregiven time duration has elapsed.

REFERENCES:
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patent: 4833909 (1989-05-01), Matthiessen
patent: 4976135 (1990-12-01), Stock

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