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System Sensor 2W-B Two Wire Smoke Detector


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System Sensor 2W-B Two Wire Smoke Detector

Most all modern alarm system now support this 2 wire type smoke detector. A two-wire smoke sends the power and zone circuit down the same two wires. We're often asked which type we recommend, 2 wire type or 4 wire type. If you are going to have only a few and they will all be on one level, we recommend 2 wire type. On the other hand, if you will have smoke detectors on more than one level, will have more than a four or five, or you need them with built-in sounders we then recommend the 4 wire type variety.

Data Sheet
Installation manual


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  • Do these detectors need to be replaced every 10 years as with other types of detectors?

    Yes, all smoke detectors are supposed to be replaced after 10 years because they lose sensitivity over time.

  • Do I need to use ra terminals

    Not unless you are using a remote annunciator. (Most don't)

  • is this smoke sensor (System Sensor 2W-B Two Wire Smoke Detector) compatible with DSC power 1832? kindly advise. thank you

    Yes it is. It's compatible with any panel that supports 2 wire smokes, which is all the mainstream panels made by DSC, Honeywell, Napco and GE / UT over the last 20 years at least.