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GS Certification

The GS mark has developed over a period of more than twenty years into a safety mark recognized throughout the world. Technical equipment may be labelled with the GS ("Geprüfte Sicherheit" = "Tested Safety") mark if: After testing of a type by an authorized, independent body, the latter certifies that the product meets the safety requirements. The testing and certification body monitors that only products corresponding to the type are placed on the market (production monitoring). If a manufacturer meets these requirements, a GS test certificate is issued. The GS mark is based on the German Equipment and Product Safety Act (Geräte- und Produktsicherheitsgesetz) (GPSG).

GS marking also involves Factory Audit so as to ensure the manufacturer's capabilities to produce the goods with full compliance to the standard requirements. Surveillance audits (Pre-license Audit and Annual Product Inspection) required to be carried out before and after GS certification.

Pre-license Audit

This is the first factory visit mainly for the facility and quality system audit. All aspects related to the quality system like IQC, stock control, material handling, production control, in-process QC and final QA should be checked. Therefore, it can be carried out before completion of test. Certification will be achieved only when both product testing and Pre-license Audit was satisfactorily completed.


Annual Product Inspection

This is the follow up audit mainly for verification of the certified products. It should be scheduled when that the certified product is to be on production. There are two points for product verification: components used and product verification test.

Normally speaking, Annual Product Inspection should be done at least once per calendar year after the Pre-license Audit. If there was any non-compliance cited from the previous audit, the applicant needed to submit the certified body the written explanation of correction method. Another purpose of the follow up audit is to ensure that the stated correction has been properly carried out to prevent the non-compliance from happening again. Besides GS Mark application and testing