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Duct Detector with Improved Functional Test Capability

  • US 20130239659A1
  • Filed: 03/16/2012
  • Published: 09/19/2013
  • Est. Priority Date: 03/16/2012
  • Status: Active Grant
First Claim
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1. A particulate detector for use in a ventilation duct, comprisinga main housing;

  • a detector assembly disposed within the main housing, the detector assembly including a detector housing, a filter screen, a detector chamber, a light emitter, and a light detector;

    at least one test light disposed within the main housing adjacent to the detector assembly; and

    a plurality of labyrinth members defining at least a portion of the detector housing, wherein the labyrinth members allow light emitted by the at least one test light to pass through the detector housing.

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