What is the UL standard for intrusion detectors?

The UL standard for intrusion detectors is UL 639. This standard provides guidelines and requirements for the performance and testing of intrusion detection systems, ensuring that they function effectively in securing property and providing reliable alerts in the event of unauthorized access.

UL 639 encompasses various types of intrusion detection technologies, including motion sensors, glass break detectors, and other forms of alarms. By adhering to this standard, manufacturers and installers can ensure that their products meet industry benchmarks for safety and effectiveness, enhancing the overall reliability of security systems.

The other standards mentioned focus on different aspects or types of alarms or systems, which do not specifically cover intrusion detectors, thereby differentiating UL 639 as the correct reference for this subject.