The GS mark, or Geprüfte Sicherheit (in English: verified safety), is a certification mark for equipment safety.   Its presence indicates that the equipment complies with German and European highest safety requirements.

The major difference between the GS mark and the CE mark is that compliance with European safety requirements has been verified and ascertained by an independent internationally approved group. The mark is based on the GPSG (Geräte- und Produktsicherheitsgesetz, in English: decree for product and appliance safety).

The GS certification company analyzes in depth all balancers’ projects, materials and mechanics, down to the smallest screw, to assess safety compliance in the design, then physical compliance tests follow the theoretical analysis, where the balancers undergo severe checks through a predefined safety checklist issued by the GS certification procedure.

Ropes are tested up to 7 or 10 times their maximum load allowance (depending on rope materials); fall protection systems are verified and must engage within a minimal time frame to ensure that in case of spring breakage the load does not fall more than 10cm; and so on, with a long, exhausting list of tests and tasks.

The GS mark is granted only with full 100% success of all tests. And it is renewed yearly on randomly chosen models to ensure the continuity of the safety and quality of the product.