About ToPro-Tech We are one of the leading components manufacturers in world which dedicated in R&D, production and supply the prepayment Electronic meter and smart meter components since 2009.  We are Specializing in develop and manufacture Relays, Current transformer( DC immunity or not), shunt resistors, counter, brass terminals &screws, tooling for copper blades and links, meter enclosures, meter mechanical designs.  The factory has passed ISO 9001 quality system certification, and the production lines carry out TS16949 to guarantee the products quality stable and reliable in long term. Topro tech is one of the members of national standard technical committee for electrical measuring instruments, draft the standard of latching relay for electronic watt-hour meters. We have an energetic and experienced technical and service team, to supply the technical and commercial support for the individual requirements.  The advanced production and testing equipments ensure the reliable quality product. ToPro-tech company has equipped by  high-speed punch machine, normal/high temperature welding machine, relay technical performance index tester, temperature rising tester, pulse width testing device, relay endurance testing panel etc.  Quickly response to customer requirements, and all the questions and inquiry will be replied within 24 hours during the working day. Â