# FM 3610 — Which OSHA-recognized labs (NRTLs) can certify to a given test standard

For FM 3610, 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; nrtl is CSA; laboratory is CSA Group Testing and Certification Inc; status is currently recognized, recorded from its source on 2026-08-10.

- **Test standard:** 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)_
- **NRTL:** CSA _(verified: appears in the quote below)_
- **Laboratory:** CSA Group Testing and Certification Inc. _(verified: appears in the quote below)_
- **Status:** currently recognized _(our reading, not quoted from the source)_

## 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/csa

Last verified: 2026-08-10. Review by: 2026-11-08.
Part of [Which OSHA-recognized labs (NRTLs) can certify to a given test standard](https://referencesource.org/nrtl-recognized-test-standards/).