Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1998-11-10
1999-10-19
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
324468, 431 73, 431 12, 431 25, 431 78, 436153, 328 6, 361253, G08B 1712
Patent
active
059696176
ABSTRACT:
A flame ionization detector having a pair of spaced electrodes to which a DC voltage is applied and a flame produced between the electrodes by burning a gas whose composition is to be determined, thereby ions are produced which form an ion current between the electrodes which is representative of the gas composition to be measured. The flame detector is formed by a base plate having a first channel for inlet of the gas whose composition to be measured, a second channel for inlet of a combustion gas, a third channel connected to the first and second channels for conveying a mixture of the gases to an outlet communicating with a nozzle outlet in a ceramic plate on the base plate which faces an opening in a metal plate spaced at a predetermined distance from the ceramic plate such that the flame burns in the opening in the metal plate. An electrically conductive metal layer is disposed on the ceramic plate around the nozzle outlet therein. A negative pole of the DC voltage supply is connected to the metal plate as one of the electrodes and the positive pole of the DC voltage supply is connected to the electrically conductive metal layer as the other of the pair of electrodes. An output line is connected to the electrically conductive metal layer to provide an output signal.
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Hauschulz, G. "Emissions-und Immessionsmesstechnik im Verkehrswesen" ("Emission and Imission Measurement Technology in Traffic Systems") Verlag TUV Rheinland GmbH (1993), pp. 213-215.
Hofsass Jeffery A.
Nguyen Tai T.
Pierburg AG
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