SGS is a certification company that provides inspection, verification, testing, and certification services. The SGS Group is headquartered in Switzerland and has offices in more than 140 countries worldwide. 

SGS certificate indicates that a product or process has been assessed and found to be compliant with specific standards, thus demonstrating the quality and safety of the product or process. 

ISO is an abbreviation for the International Organization for Standardization, a non-governmental organization that develops and publishes standards for various industries and processes. ISO certifications are globally recognized certifications that demonstrate that an organization has implemented a particular standard of quality, security, or safety.

CE marking is a certification mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA). 

The CE certificate indicates that a product meets the relevant legal requirements and the product can be legally sold within the EEA. It ensures that products have been appropriately assessed and meet the essential health and safety requirements of the Europe Union (EU) legislation.