# FM 3610 — Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced

For FM 3610, laboratory is Intertek Testing Services NA, Inc; standard title is Examination Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II and III, Division 1, Hazardous (Classified) Locations, verified against its source on 2026-08-10.

- **Laboratory:** Intertek Testing Services NA, Inc. _(verified: appears in the quote below)_
- **Standard number:** FM 3610 _(verified: appears in the quote below)_
- **Standard title:** Examination Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II and III, Division 1, Hazardous (Classified) Locations _(verified: appears in the quote below)_

## What the source says

> FM 3610 | Examination Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II and III, Division 1, Hazardous (Classified) Locations |

## Source

- https://www.osha.gov/nationally-recognized-testing-laboratory-program/its

Last verified: 2026-08-10. Review by: 2026-12-08.
Part of [Which OSHA NRTL is recognized for which test standard: all 21 labs' scopes of recognition, cross-referenced](https://referencesource.org/nrtl-recognition-scopes/).