28 - Electronic Safety and Security

28 1000 - Electronic Access Control
- 08 7400 - Access Door Control Hardware
28 2000 - Electronic Surveillance
- 28 2030 - Video Surveillance
28 3000 - Electronic Detection and Alarm
- 28 3100 - Fire Detection and Alarm
- 28 3600 - Gas Detection and Alarm

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The Google Custom Search includes results from the top 3,500 sites in 4specs. This helps focus your search on manufacturers you can easily specify. You can expand the search on the next pass to include all sites found in Google.

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