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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) The abbreviation "NRTL" must
appear below the ARL mark.

Canadian Standards Association (CSA)
(also known as CSA International)
Marks below used for products meeting only U.S. standards Marks below used for products meeting both U.S. and Canadian standards
 
CSA mark
CSA mark
 
CSA mark
CSA mark
  Mark below used for gas-fueled products meeting U.S. standards (see note2)  
 
CSA mark
 
Canadian Standards Association (CSA)(mark formerly used by the American Gas Association (AGA), exclusively licensed to CSA until June 30, 2001)
AGA mark
 

Communication Certification Laboratory, Inc. (CCL)
(DBA Nemko-CCL, Inc.)
Mark below used for products meeting only U.S. standards (Commenced use August 2013)

Nemko US mark
Mark below used for products meeting only U.S. and Canadian standards (Commenced use August 2013)

Nemko US & Canada mark
    Mark below used for products meeting US Standards through August 2015

CCL mark

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)
 
CSL US mark
CSL US & Canada mark
Original mark (use allowed until May 1, 2010)
CSL mark
 

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

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
 
FM mark
FM mark

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

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)
 
MET mark
MET mark
   
MET mark
    Mark below used for products meeting both U.S. and Canadian standards (original MET mark)
   
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
 
NSF US mark
NSF C & US mark
  Mark below used for products meeting only U.S. standards (see note4) Mark below used for products meeting both U.S. and Canadian standards
 
NSF US mark
NSF C & US mark

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

(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
 
QPS Evaluation Services Inc (QPS)
QPS Evaluation Services Inc (QPS)

SGS North America, Inc. (SGS) (formerly SGS U. S. Testing Company, Inc.) New SGS Certification Mark (Commenced use - August 2013)  
 
SGSUS mark
Mark Below - Old SGS Certification Mark Used through August 2018
SGSUS mark

Southwest Research Institute (SWRI)
SWRI mark
 

TV SD 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
 
2008 TUV mark
TUVAM mark
  Use to commence in early 2008 (see note5)  

TV SD 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
 
2008 TUV mark
TUVPSG mark
  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
 
TUV mark
TUV mark
     
   
2008 TUV mark
    Use to commence in February 2010
 
TUV mark
 
  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
 
TUV mark
TUV mark
   
2008 TUV mark

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
UL mark
UL mark
Equivalent to above
UL mark
UL mark

Wyle Laboratories (WL)
(recognition terminated effective
8/24/11)
WL mark

(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