SERV Trayvou Interverrouillage (STI Interlocks)


Located near Paris in France, STI is represented throughout the world via an extensive network of distributors and salespeople. The commercial team advises and supports customers on the implementation of safety systems, which are adapted to your working conditions.

STI provide safety solutions that comply with controlled safety rules and regulations, enabling customers to achieve the required protection at each step of the safety process.

With more than 120 years of experience, STI provide safe environments through smarter protection that adapts to your existing facilities.

Originally developed for railway applications, STI’s products were swiftly accepted industry-wide, due to their simplicity and efficiency. STI has supplied systems for staff protection in numerous fields, including; railway and power generation, chemicals and petrochemicals, the steel industry and the food industry.

Each year STI invests more than 5% of its turnover in research and development to maintain its leading position.


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