At present, there are 8 kind of CE certification mark are approving by European Union:
(1)     The Factory self control and certification.
Module A (internal production control):
1. Uses for simple, large quantities and non hazardous products, which are only suit for the European standards factors.
2. Factory self qualification review, and self declaration.
3. The technical document need to keep 10 years in the state organization, on this basis, Can use reviewed and checked to determine whether the product is comply with the instructions or not. Producers may even need to provide product design, production and assembly processes for the inspection.
4. Does not need to declare its production process can always ensure that the product meets the requirements.
 
Module Ab：
1. Manufacturers are not in accordance with the European standards of production.
2. Test organization will make random test for special components of products.
 
(2) Review by testing organization.
Module B (EC type review):
The factory sends the sample and the technical document to the test organization for review, and the test organization issued the Certificate.
Note: only have B is cannot use of CE.
Module C (consistent with type [sample]) +B:
The factory makes a conformance statement (consistent with the type of certification), and declared need to be kept for ten years.
Module D (quality control of production process) +B:
This model is focuses on the production process and the final product control, factory according to the method that approval by test organization (quality system, EN29003) to produce products, and declaration of its products are same with the certification type (consistency statement).
Module E（product quality control）+B：
This mode is only concerned with the final product control (EN29003), and the others are same as the Module D.
Module F（product test）+B：
Factories make a consistent statement when they can ensure that the production process can let the product meets the requirements. Accredited testing organizations will though the full inspection or sampling inspection to verify the conformity of the product. Then the test organizations issue the certificate.
Module G（Test one by one）：
The factory declarations are in accordance with the requirements of the directives, and submit product technical parameters to test organization, the test body will one by one to check the product after that to issuance the certificates.
Module H（integrated quality control）：
This model is concerned with the design, production process and final product control (EN29001). The others are Module D+ Module E. Inside, the mode F+B, mode G is suitable for a particularly high degree of risk products.