SANDING Optic-electric Instrument Co.,Ltd.(hereafter referred as SANDING), has set up R&D and manufacturing departments in Guangzhou, Beijing, Wuhan and Changzhou, which are responsible for the R&D and production of SANDING total stations, theodolites, laser instruments, electronic levels, prisms, surveying accessories, and etc.

SANDING is a world-class production base of surveying instruments, with an annual capacity of 15,000 electronic theodolites and 10,000 total stations. It produced the first electronic theodolite, as well as the first total station in China. Nowadays, SANDING produces products including total station STS-750/750R, STS-720/720R Series, and the nationally reputable electronic theodolite ET/DT-02/05 Series, which are at leading technological level in China. With its outstanding competence for scientific research, advanced industrial equipment, and innovative management philosophy, SANDING is devoted to provide the best products and technical service to customers.