New System Sensor 2251B Photoelectric Smoke Detector

System Sensor 2251B Intelligent Photoelectric Smoke Sensors are designed for use with System Sensor intelligent control panels.COMPATIBLE INTELLIGENT BASES:— B210LP Standard U.S. flanged low-profile mounting base.— B710LP Standard replacement flanged low-profile mounting base.— B501 Standard European flangeless mounting base.— B200S Intelligent, programmable sounder base— B200SR Intelligent sounder base - Replaces B501BH series bases in retrofit applications.— B224RB Plug-in System Sensor relay base.— B224BI Plug-in System Sensor isolator detector base. NOTE: All base types require an electrical backbox which is at least 1.5" (3.81 cm) deep.