SIO is a company that has been involved in R&D and producing optoelectronic components for over 20 years. SIO's products are highly regarded in the market for their use in smart power grid applications, metal smelting, chemistry processes, and scientific research. 
With a production capacity of up to 1,000 FS systems per year, SIO has become one of the largest teams in the world for the research and production of Fiber Optic Current Sensors. Its team has more than 50 members, out of which more than 20 are dedicated to the R&D of FS systems.