Ionization smoke detector with increased operational...

Details Ionization smoke detector with increased operational... Ionization smoke detector with increased operational...

G - Physics

01

N

358/21

G01N 27/64 (2006.01) G01T 1/185 (2006.01) G08B 17/11 (2006.01)

Patent

CA 1148279

6689 INVENTORS: ANDREAS SCHEIDWEILER and PETER M?LLER CAN INVENTION: IONIZATION SMOKE DETECTOR WITH INCREASED OPERATIONAL RELIABILITY ABSTRACT OF THE DISCLOSURE An ionization smoke detector containing at least one ionization chamber operated at an extra low voltage or potential. The ionization chamber contains a sensor employing a measuring electrode and a counter electrode. Ambient air has practically free access to the ionization chamber and there are provided one or more radioactive sources for generating ions, a supply voltage source and an electrical circuit for triggering an alarm. The smoke detector possesses increased operational reliability since circuit elements are provided which enable signal reporting to a central station by means of a low-voltage of about 200 volts, however the sensor is operated at an extra low voltage.

361830

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