Freesor

Freesor is a specialized high-tech manufacturer dedicated to the research, development, and production of advanced current and voltage sensing solutions. Founded in 2005, the company focuses on delivering high-precision, reliable, and energy-efficient sensing technologies that support the rapid growth of modern electrical, electronic, and new-energy systems. Their portfolio includes Hall-effect current sensors, AC/DC voltage sensors, leakage-current sensors, current transmitters, mutual inductors, as well as customized sensing modules designed to meet diverse application needs.
With strong in-house R&D capabilities, Freesor combines innovation and manufacturing expertise to produce sensors that offer high accuracy, stable output, and robust performance even in demanding environments. The company’s solutions are widely adopted across multiple global industries, including new-energy electric vehicles, photovoltaics and energy-storage systems, industrial automation, smart power grids, data-center power distribution, instrumentation, medical equipment, rail transit, and consumer and industrial power systems.
Freesor’s sensors play a critical role in enabling safer, smarter, and more efficient power management. By supporting applications such as battery monitoring, charging infrastructure, motor control, inverters, UPS systems, welding machines, HVAC equipment, and intelligent appliances, Freesor has positioned itself as a trusted partner for OEMs and system integrators worldwide. Through continuous technological advancement and a commitment to quality, the company contributes to the evolution of next-generation electronics and the global transition toward cleaner, more intelligent energy systems.