The System Sensor 1151 and 2151 are low-profile ionization and photoelectric, plug-in type smoke detector heads. They offer super performance and reliability, meeting the stringent performance criteria designated by UL 268 and ULC, in a profile of just 1.66" (42 mm).
Aesthetically pleasing to engineers, architects, building owners and homeowners, the 1151 and 2151 can be used with four different adapter bases in a variety of wiring configurations and voltages. Model 1151 (ionization sensor) and 2151 (photoelectronic sensor) share the same sleek low-profile design.
The 2151 Photoelectric smoke detector contains a unique optical sensing chamber designed to sense the presence of smoke particles produced by a wide range of combustion sources. A custom integrated circuit incorporates signal processing to help reduce false alarms.