Siemens PBR-1191 Conventional Linear Beam Smoke Detector – RYBB Fire Alarm Parts, Service, & Repairs
Amazon.com: 3.4“ Round German Reflector | Silver Mirror | Flat | Plastic | for USE with POLORIZED Super Retro-Reflective |PHOTOELECTRIC SENSORS | Photo Beam Sensor | Very HIGH LUMINANCE Factor 6000 X : Industrial & Scientific