G - Physics – 08 – B
Patent
G - Physics
08
B
340/124, 340/147
G08B 21/00 (2006.01) G01N 21/53 (2006.01) G01N 33/00 (2006.01) G08B 17/11 (2006.01)
Patent
CA 1203303
Attorney's Docket No. 7396 CAN INVENTOR: ALAN TROUP, SIGFRID STRaSSLER, HANNES GuTTINGER and GUSTAV PFISTER INVENTION: DEVICE FOR THE DETECTION OF FOREIGN COMPONENTS IN A GAS AND AN APPLICATION OF THE DEVICE ABSTRACT OF THE INVENTION An aerosol detector, for instance a transmission measurement path in a measurement chamber, is provided for the detection of a foreign component in a gas, for instance of incendiary aerosols or smoke in air, and communicates with a reference chamber containing aerosol-free reference gas. The gas in the measurement chamber is periodically exchanged for uncontaminated gas from the reference chamber by a periodical volume alteration of the reference chamber so that, in the presence of aerosols, the aerosol concentration in the measurement chamber and the output signal of the aerosol detector are modulated. The modulation, i.e. the variable portion of the output signal, is an indication of the aerosol concentration or the smoke density. A particularly suitable application is smoke detection in air for the purpose of fire or incendiary reporting or for monitoring air pollution. WWK:FR:se:senc2
458353
Guttinger Hannes
Pfister Gustav
Strassler Sigfrid
Troup Alan
Cerberus Ag
Johnson & Hicks
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