Topstek Inc. was founded in 1998. The headquarters is located in Taiyuan country, Taiwan. They are engaging in original designing and production of DC and AC current transducers for the international market. Their main market is in the Asia. Their products line includes AC current transformers, anti-magnet AC current transformer, closed loop hall effect current sensor, open loop CT 1A to 75A, open loop CT 25A to 600A, open loop CT 100A to 500A, true RMS current sensor. Their specialized product line according to the CE certification tests and all components integrated into their current transducers comply with RoHS standards. They have received the ISO9001:2000 certification. They design, develop and manufacture the products according to the standard, which also spread to their sales and customer service ways. They own highly skilled. The motto of the Topstek is “Stability and Integrity”. With these advantages, they ensure they can produce the highest quality products. Topstek can provide products which are custom designed. Their production equipment and technical expertise are very excellent to according to the customers needs. In Topstek, customer will have a outstanding solution and advanced product.