Company Introduction Shanghai Nayu Electric Co., Ltd. is formerly known as the Electric Instrumentation Division of APT, a well-known and leading enterprise in the power distribution and industrial automatic control fields. APT is specialized in the research and develpopment, production and sales of complete series of APT brand indicators, buttons, digital electric gauges, motor protectors, change-over switch, current transformer, warning lights, control boxes and other products in advanced international level. APT has been providing reliable and high quality products and first-class services and solutions for industry, construction, energy, infrastructure, residence and other large markets.