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DTi is a domestic third-party testing and certification organization, provides a one-stop solution for UL certification, with an experienced engineering/business team, With more than 12 years of testing experience, we provide a full range of testing and certification needs. Service Hotline: 139-2372-2641.

What is UL certification

UL is the abbreviation of Underwriter LaboratoriesInc. The UL Safety Laboratory is the most authoritative in the United States and the largest private institution engaged in safety testing and identification in the world. It is an independent, not-for-profit, professional organization that conducts experiments for public safety.

UL was founded in 1894. In the initial stage, UL mainly relied on the funds provided by the fire insurance department to maintain its operation. It was not until 1916 that UL was completely independent. After nearly a hundred years of development, UL has become a world-renowned certification body with a set of strict organizational management systems, standard development and product certification procedures.

At present, UL is mainly engaged in product testing, management system evaluation, quality system review and registration, product inspection and standard formulation. The UL mark has become one of the world's famous safety certification marks.

UL Scope

Security products UL294 access control controller, UL639 intrusion detector, UL1037 household anti-theft alarm device, UL2058 electronic lock, etc.

UL Approved Mode

UL certification is a voluntary certification, which is certified in the mode of "type test + first factory inspection + supervision and inspection after certification".

Factory Inspection

UL regional inspectors contact the production factory for the first factory inspection;

Check the condition of the product and its parts in the production line and warehouse to confirm whether the product structure and parts are consistent with the tracking service details;

When the inspection results meet the requirements, apply for authorization to use the UL mark;

UL will also conduct irregular factory inspections every year, ranging from 1-4 times;

If you plan to improve the product structure or components, you need to inform UL. For small changes, you do not need to repeat any experiments. UL can quickly change the details of the tracking service so that the inspector can accept the improvement;

When UL believes that the improvement affects safety performance, the applicant company needs to resubmit samples for necessary testing;

The certificate will be issued within 2 weeks after the test is passed.

UL certification application materials

Business license;

Instruction Manual;

Product model, specification parameters and photo statistics table;

List of key parts and parts UL certification number;

Other materials: such as product circuit diagrams, etc.

UL certification process is

Submit the test application form;

Provide samples and materials;

sample testing;

issue a test report;

factory inspection;

Obtained UL authorization and certificate;

The factory has four annual audits.

Service Advantage

DTi testing is an independent third-party testing organization in China, with CNAS/CMA qualifications/technical team/accumulated years of experience in the field of UL certification, and can provide you with more professional and reliable UL certification according to the latest management and control requirements of UL certification Detection service.