There are two National Industrial Listing Certifications: National Industrial Security Systems (CRZH) and National Industrial Monitoring Station (CRZM).

The Standard for National Industrial Security Systems, UL 2050, was developed in collaboration with US Federal Security Agencies. The technical requirements of UL 2050 describe the elements of alarm protection (intrusion detection) needed to coordinate with related security measures that come into force when defense contractors hold sensitive material.


National Industrial Security Systems

A National Industrial Security System is installed and is remotely monitored on alarm receiving equipment located in a government contracted monitoring station, or an independently Listed central station. The purpose of this monitoring is to notify the proper personnel responsible for responding to, and investigating, signals.

National Industrial Security Systems must be monitored for:

  • opening
  • closing
  • alarm and trouble signals

If a government contracted monitoring station, or a listed central station monitoring facility, is not available, alarm and trouble signals must be monitored by a law enforcement station, or an emergency dispatch center.


National Industrial Monitoring Station

A National Industrial Security Monitoring station is a facility that has personnel on duty specifically trained to handle signals received from National Industrial Security Systems. The purpose of this monitoring is to notify personnel responsible for responding to, and investigating, signals and also to record all signals received from the protected property. National Industrial Security systems are monitored for:

  • opening
  • closing
  • alarm and trouble signals