Reference Source

UL 539

For UL 539, laboratory is UL LLC; standard title is Single and Multiple Station Heat Detectors, verified against its source on 2026-08-10.

Laboratory
UL LLC verified
Standard number
UL 539 verified
Standard title
Single and Multiple Station Heat Detectors verified
Sourceosha.gov
Verified
Review by
DatasetWhich OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

What the source says

UL 539 | Single and Multiple Station Heat Detectors |

— osha.gov, retrieved 2026-08-10

Source

Last verified against source: . Due for re-check by . This page as Markdown · OKF bundle · full dataset as JSON.