Nationally Recognized Testing Laboratories | Typical Registered Certification Marks

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NRTLs use the following marks to certify products for purposes of OSHA product-approval requirements. However, the presence of the mark on a product does not necessarily mean that it meets OSHA requirements, since NRTLs sometimes use these same or similar marks for non-OSHA purposes. OSHA accepts only those products that contain the NRTL's mark and that the NRTL has certified within its scope of recognition, which includes the test standards and testing sites that OSHA has recognized for the NRTL. See the OSHA web page for information on each NRTL's scope of recognition, or contact OSHA or the NRTL for additional information.


Applied Research Laboratories, Inc. (ARL) (recognition terminated effective 1/28/08)	(See supplemental information)	The abbreviation "NRTL" must appear below the ARL mark.

Canadian Standards Association (CSA)	Marks below used for products meeting only U.S. standards	Marks below used for products meeting both U.S. and Canadian standards


	Mark below used for gas-fueled products meeting U.S. standards (see note²)

Canadian Standards Association (CSA)(mark formerly used by the American Gas Association (AGA), exclusively licensed to CSA until June 30, 2001)

Communication Certification Laboratory, Inc. (CCL)

Curtis-Straus LLC (CSL)	Marks below used for products meeting only U.S. standards (see note³)	Mark below used for products meeting both U.S. and Canadian standards (see note³)

Original mark (use allowed until May 1, 2010)

Electrical Reliability Services, Inc. (ERS) (also known as eti Conformity Services and formerly Electro-Test, Inc. (ETI)) (recognition terminated effective 6/23/08)	(See supplemental information)

Entela, Inc. (Voluntary termination effective 1/28/08 - acquired by the parent company of ITSNA)	Entela marks are now being used by ITSNA. See ITSNA marks below.

FM Global Technologies LLC (FM) (also known as FM Approvals and formerly Factory Mutual Research Corporation)	Mark below used for products meeting only U.S. standards	Mark below used for products meeting both U.S. and Canadian standards


Intertek Testing Services NA, Inc. (ITSNA) (formerly ETL Testing Laboratories, Inc.)	Marks below used for products meeting only U.S. standards	Marks below used for products meeting both U.S. and Canadian standards




(Note: In 2004, Entela, Inc., was acquired by the parent company of ITSNA.)

MET Laboratories, Inc. (MET)	Mark below used for products meeting only U.S. standards Commenced use - January 2006)	Marks below used for products meeting both U.S. and Canadian standards (Commenced use - January 2006)


		Mark below used for products meeting both U.S. and Canadian standards (original MET mark)


NSF International (NSF)	Mark below used for products meeting only U.S. standards Use to expire 12/31/2012	Mark below used for products meeting both U.S. and Canadian standards Use to expire 12/31/2012

	Mark below used for products meeting only U.S. standards (see note⁴)	Mark below used for products meeting both U.S. and Canadian standards


National Technical Systems, Inc. (NTS) (recognition expired effective 6/21/12)	(See supplemental information)

QPS Evaluation Services Inc (QPS)	Mark below used for products meeting only U.S. standards	Mark below used for products meeting both U.S. and Canadian standards


SGS U. S. Testing Company, Inc. (SGSUS) (formerly U.S. Testing Company, Inc.)

Southwest Research Institute (SWRI)

TÜV SÜD America, Inc. (TUVAM)	Mark below used for products meeting only U.S. standards	Mark below used for products meeting both U.S. and Canadian standards

	Use to commence in early 2008 (see note⁵)

TÜV SÜD Product Services GmbH (TUVPSG)	Mark below used for products meeting only U.S. standards	Mark below used for products meeting both U.S. and Canadian standards

	Use to commence in early 2008 (see note⁵

TUV Rheinland of North America, Inc. (TUV)	Note: two TUV marks temporarily removed from this page.
	Mark below used for products meeting only U.S. standards	Marks below used for products meeting both U.S. and Canadian standards

	Use to expire December 31, 2012.	Use to expire December 31, 2012.

		Use to commence in February 2010

	NRTL previously used mark above but ceased authorizing on or about January 2000.

TUV Rheinland PTL, LLC (TUVPTL)	Mark below used for products meeting only U.S. standards	Marks below used for products meeting both U.S. and Canadian standards



Underwriters Laboratories Inc. (UL)
	Marks below used for products meeting only U.S. standards	Marks below used for products meeting both U.S. and Canadian standards
Basic marks
Equivalent to above
"Used on products which UL has evaluated for specific properties, a limited range of hazards, or suitability for use under limited or special conditions. Typically, products Classified by UL fall into the general categories of building materials and industrial equipment." Examples: fire doors, protective gear for fire fighters, industrial trucks.

Wyle Laboratories (WL) (recognition terminated effective 8/24/11)	(See supplemental information)

¹ Certification marks registered by the NRTL with the US Patent and Trademark Office. Some NRTLs may have additional marks; however, the core logo of the additional marks should be the same as represented here. If you have questions about the authenticity of any mark, contact the NRTL.
² OSHA requirements for testing and certification of gas operated equipment is limited to equipment using "liquefied petroleum gas" ("LPG" or "LP-Gas").
³CSL Note: Notice of Allowance issued on 11-21-06
⁴NSF Note: Version of mark previously shown on OSHA web page - never placed in use
NSF original mark

⁵TUVAM and TUVPSG note: Notice of Allowance issued on 10-9-07.


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