The most authoritative certification in the United States-UL certification！

UL--the full name of Underwrites Laboratories Inc. It is the most authoritative in the United States and the largest private organization engaged in safety testing and appraisal in the world. It is an independent, non-profit, professional organization that conducts experiments for public safety. It uses scientific testing methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property and the degree of harm; to determine, compile and issue corresponding standards and help reduce and prevent life Data on property losses, while conducting fact-finding research business. UL certification is a non-compulsory certification in the United States, mainly for product safety performance testing and certification, and its certification scope does not include the EMC (electromagnetic compatibility) characteristics of the product.

In short, it is mainly engaged in product safety certification and operating safety certification business, and its ultimate goal is to obtain products with a fairly safe standard for the market, and to contribute to the guarantee of personal health and property safety. In terms of product safety certification as an effective means to eliminate technical barriers to international trade, UL also plays an active role in promoting the development of international trade.

UL was established in 1894 as a non-profit product safety testing and certification organization. There are more than 50 laboratories around the world with approximately 6000 employees. Thousands of products pass UL certification and use the UL mark each year. There are currently more than 800 sets of UL standards, of which 75% are adopted by the American National Standard Institute (ANSI: American National Standard Institute).

Currently, UL has five laboratories in the United States, headquartered in North brook Town, north of Chicago, and established corresponding laboratories in Taiwan and Hong Kong. There are three types of UL safety certifications: recognition, listing, classification, and the three ways of marking are different.

1. UL listing service is the most well-known service in UL safety certification. The UL listed mark on the product means that the manufacturer allowed UL to test the samples according to the safety standards recognized by the United States. Under reasonable and foreseeable conditions, the samples will not cause fire, leakage and related hazards.

2. The approved component service is to test parts or non-finished products, and these components will be used in UL listed products. UL' s approved component services cover millions of plastics, wires and circuit boards, as well as various finished products, or even larger components such as motorcycles or power supplies.

3. UL graded products are tested according to different properties, designated danger ranges, or specific conditions. Generally speaking, most of the graded products are building materials or industrial instruments. Graded products include industrial or commercial products, which have designated properties during testing, including flammability, hazardous performance or special specifications required by the government.