UL 639
For UL 639, standard title is Intrusion-Detection Units; status is listed as appropriate, recorded from its source on 2026-08-10.
- Test standard
- UL 639 verified
- Standard title
- Intrusion-Detection Units verified
- Status
- listed as appropriate our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
UL 639 | Intrusion-Detection Units |
— osha.gov, retrieved 2026-08-10
Source
- osha.govhttps://www.osha.gov/nationally-recognized-testing-laboratory-program/list-standards