System Sensor 2151

This smoke detector is fairly rare.

  • Brand
  • Model 2151
  • Manufacturer System Sensor
  • Type Smoke Detector (Photoelectric, 4-wire)

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Siemens ZH-MC-W

Siemens ZH-MC-W

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The candelas selector on this alarm is broken, so the strobe is stuck on 75 candelas.
Notifier BNG-1

Notifier BNG-1

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This pull actually opens with a “B” key, the key most commonly used by Simplex.
ADT ADT-PS

ADT ADT-PS

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Personally, I think that the ADT logo on the head of this smoke is a bit ugly.