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APT has been established in 1993, it is  a Chinese leading manufacturer of low-voltage control devices.
Brand concept come from the initial letters of three English words:Advanced (A), Perfect (P) ,Top (T).
In August 2008, SIEMENS had acquired APT's brand and assets, APT became a siemens company.
APT focus on manufacturing push buttons, pilot devices, buzzer, stack lights, cam switches, current transformers, limit switches and relay.
Siemens APT as a professional manufacturer and supplier maintains the industrial leadership in low voltage electrical components and parts fields to provide better products and solutions to China and global markets.