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General Information
 

Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product-safety testing and certification organization. We have tested products for public safety for more than a century.

 

Since our founding in 1894, we have held the undisputed reputation as a leader in product-safety testing and certification within the United States. Building on our household name in the United States, UL is becoming one of the most recognized, reputable conformity assessment providers in the world. Today, our services extend to helping companies achieve global acceptance, whether for an electrical device, a programmable system, or an organization's quality process.
Here's more information about UL's global conformity work in 2005:

 

20 billion UL Marks appeared on products.

71,409 manufacturers produced UL-certified products.

UL conducted 97,915 product evaluations.

UL evaluated 19,140 types of products.

123 UL inspection centers.

UL customers were found in 96 countries.

UL reached 210 million consumers with safety messages in the United States and Canada.

There were 1,291 UL Standards and 376 ULC Standards.
UL registered 5,936 facilities to a management system standard as of Dec. 31, 2003.
62 laboratory, testing and certification facilities were part of the UL family of companies.
Nearly 5,800 staff of the UL family of companies ready to serve UL customers.
 
- BWS Tech Service
- CBTL of UL DEMKO from IECEE
- Witness Testing Lab.
- Help to customer
 
UL's Marks
UL Listing Mark
This is one of the most common UL Marks. If a product carries this Mark, it means UL found that representative samples of this product met UL's safety requirements. These requirements are primarily based on UL's own published Standards for Safety. This type of Mark is seen commonly on appliances and computer equipment, furnaces and heaters, fuses, electrical panelboards, smoke and carbon monoxide detectors, fire extinguishers and sprinkler systems, personal flotation devices like life jackets and life preservers, bullet resistant glass, and thousands of other products.

UL Listing vs. Recognition. What's the difference? -- Find out in this brief article from UL's Code Authority Newsletter.
 
C-UL Listing Mark
This mark is applied to products for the Canadian market. The products with this type of mark have been evaluated to Canadian safety requirements, which may be somewhat different from U.S. safety requirements. You will see this type of Mark on appliances and computer equipment, vending machines, household burglar alarm systems, lighting fixtures, and many other types of products.
 
Classification Mark
This mark appears on representative samples of products that UL has evaluated but only with respect to 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 of types of equipment Classified by UL include immersion suits, fire doors, protective gear for fire fighters and industrial trucks.
 
C-UL Classification Mark
This Classification marking is used for products intended for the Canadian marketplace. It indicates that UL has used Canadian standards to evaluate the product for specific hazards or properties. Examples of C-UL Classified products include air filter units, firestop devices, certain types of roofing systems, and others.
 
C-UL US Classification Mark
UL introduced this new Classification Mark in early 1998. It indicates compliance with both Canadian and U.S. requirements. The Canada/U.S. UL Mark is optional. UL encourages those manufacturers with products certified for both countries to use this new, combined Mark, but they may continue using separate UL Marks for the United States and Canada.
 
Recognized Component Mark and Canadian Recognized Component Mark
These are marks consumers rarely see because they are specifically used on component parts that are part of a larger product or system. These components may have restrictions on their performance or may be incomplete in construction. The Component Recognition marking is found on a wide range of products, including some switches, power supplies, printed wiring boards, some kinds of industrial control equipment and thousands of other products. Products intended for Canada carry the Recognized Component mark "C."
 
C-UL US Listing Mark
UL introduced this new Listing Mark in early 1998. It indicates compliance with both Canadian and U.S. requirements. The Canada/U.S. UL Mark is optional. UL encourages those manufacturers with products certified for both countries to use this new, combined Mark, but they may continue using separate UL Marks for the United States and Canada.
 
Recognized Component Mark for Canada and the United States
This new UL Recognized Component Mark,which became effective April 1, 1998, may be used on components certified by UL to both Canadian and U.S. requirements. Although UL had not originally planned to introduce a combined Recognized Component Mark, the popularity of the Canada/U.S. Listing and Classification Marks among clients with UL certifications for both Canada and the United States has led to the new Mark.
 
Blue Sanitation Mark
It is optional and supplements the Classification Mark. Learn more.
 
EPH Product Mark
The UL EPH mark appears on products that have been evaluated to Environmental and Public Health Standards. The "Classified" version is used for products complying with ANSI/NSF Standards and other food equipment hygiene codes and requirements. Examples include Food Service and Meat and Poultry Plant Equipment. The "Listed" version is typically used for products complying with UL's own published EPH Standards for Safety.
 
Field Evaluated Product Mark
A Field Evaluated Product Mark is applied to a product that is thoroughly evaluated in the field instead of UL's laboratories or the manufacturer's facility. If a product has been significantly modified since its manufacture or the product doesn't bear any third-party certification mark, a building owner, a regulatory authority, or anyone else directly involved with the product can request that UL conduct tests in the field on the specific piece of equipment. Products that meet appropriate safety requirements are labeled with a tamper-resistant Field Evaluated Product Mark.
 
Gas-Fired Mark
UL now offers a new Gas-Fired Listing Mark to be used exclusively on gas-fired appliances and equipment. The Gas-Fired Mark indicates a product's compliance to nationally recognized gas standards, including UL, ANSI Z21/Z83 Series and CSA/CGA standards. The Gas-Fired Mark signals that a product has been evaluated to reasonably foreseeable hazards including both gas and electrical hazards. Read our Gas-Fired Mark FAQs.
 
Marine Mark
The UL Marine mark appears on products which have been evaluated specifically for marine use. Products bearing this Mark have been evaluated to UL's published Marine Safety Standards and other applicable standards and codes. These requirements address hazards that can occur as a result of exposure to harsh marine environments such as vibration, shock (impact), ignition protection, water ingress and salt spray corrosion common on pleasure craft and boats. Examples of the type of equipment suitable for the UL Marine Mark include alternators, battery chargers/power inverters, navigation lights, and fuel tanks, filters and pumps.
 
Security Mark
The UL Security Mark appears on products evaluated to national security products standards. Typical products carrying the UL Security Mark include intrusion detectors, burglar alarms, access controls, anti-theft alarms, surveillance systems, safes and vaults. Until the UL Security Mark is fully implemented in May 2007, UL certified security products may also carry a traditional UL Listing Mark.
 
Signaling Mark
UL Signaling Mark appears on products evaluated to national signaling products standards. Typical products carrying the UL Signaling Mark include smoke detectors, fire alarms and hospital nurse call systems. Until the UL Signaling Mark is fully implemented in May 2007, UL certified signaling products may also carry a traditional UL Listing Mark.
 
Security and Signaling Mark
The UL Security and Signaling Mark appears on products that are certified for both security and signaling functions. A typical example is a combination fire and burglar alarm system, which is certified both applications. Until the UL Security and Signaling Mark is fully implemented in May 2007, these products may also carry a traditional UL Listing Mark.
 
Water Quality Mark
The UL Water Quality Mark appears on drinking water products evaluated to drinking water standards. The UL Water Quality Mark can be found on drinking water treatment additives, drinking water treatment/filtration units, drinking water system components and materials, and distribution and plumbing products. Until the UL Water Quality Mark is fully implemented in 2010, the UL EPH may also appear on drinking water products.