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Multi-sensor device and methods for fire detection

  • US 7,551,096 B2
  • Filed: 03/30/2006
  • Issued: 06/23/2009
  • Est. Priority Date: 09/19/2002
  • Status: Expired due to Term
First Claim
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1. A detector for sensing an environmental condition comprising:

  • a light sensor which generates a first signal indicative of incident ambient light intensity;

    at least a second sensor which generates a second signal indicative of a different environmental condition;

    where the second sensor is selected from a class which includes a smoke sensor, a gas sensor, a thermal sensor, a humidity sensor, and a motion sensor;

    a processor that receives the first and the second signals, the processor using the first signal to alter a delay time associated with the second sensor, the processor using the first signal to alter a sensitivity parameter associated with the second sensor, and the processor providing an indication of the presence of the environmental condition.

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