Bosch trim plate DS150-151 REX Motion Detectors. Bosch Security Systems, Inc. is a supplier of equipment for the global electronic protection and communication system industries. They work closely with an extensive network of certified dealers and integrators to design dependable communications, security, and life safety solutions . Their broad portfolio of products includes systems for communications, video surveillance, access control, and intrusion and fire detection. Bosch products are used by major enterprises and organizations such as universities, government agencies, retail stores, casinos, and industrial settings. For more than 125 years, the Bosch name has stood for quality and reliability.