# T1 — Certification marks and hazardous-area classifications: cross-market equivalences

For T1, applies to is 450º C (842ºF), verified against its source on 2026-08-11.

- **Designation:** T1 _(verified: appears in the quote below)_
- **Stated equivalent:** T1 _(verified: appears in the quote below)_
- **Applies to:** 450º C (842ºF) _(verified: appears in the quote below)_

## What the source says

> 450º C (842ºF) T1 T1 T1

## Source

- https://www.euroswitch.com/wp-content/uploads/euroswitch-hazardous-area-guide_V6.pdf

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).