Lida Digital Instrument Co., Ltd. Hunan China's power transmission switch manufacturing industry key enterprises. The main production digital ammeter, digital voltmeter, multi-function table, temperature and humidity control, high-voltage electrical components, microcomputer intelligent protection devices, substation automation system and the type of instrumentation devices. Lida products are widely used in national power, petrochemical, metallurgy, transport, coal, building materials more than 20 industries, over the domestic provinces, municipalities, autonomous regions and exported to Asia and Africa rely on more than ten countries and regions, Tianshui Changcheng Switchgear plant strong technical force, advanced production equipment and perfect management system, is committed to intelligent electronics and data transmission, control system development, production and sales. The main products include: electronic energy meter, electricity meter network, multi-function power meters, programmable digital electrical measuring instruments, digital electrical measuring instruments, power transducer, intelligent switchgear control devices, automatic control temperature and humidity, low pressure protection devices. High-tech companies as a starting point, increase research investment, innovation and improvement of products, always adhere to the philosophy of quality first, efforts to strengthen the measurement management, established a measure of quality assurance system. Products have been widely used in substation automation, distribution automation, intelligent building, the internal energy measurement, management assessment and so on. The company "business integrity, technical innovation" for business purposes. Would like to sincerely cooperate with domestic and overseas customers close, hand in hand.