2W-B

The System Sensor 2W-B is a two-wire, photoelectric smoke detector that can be added to most existing alarm system control panels.

It has built-in remote maintenance signaling and in-line terminals with SEMS screws that can mount to octagonal and 1-Gang back boxes, 4-square back boxes, or direct to the ceiling.

It also has built-in drift compensation that allows the detector to adjust its sensitivity over time as it becomes dirty automatically.