Xiamen Tianyan Instrument Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of conductivity and resistivity detection instruments for non-ferrous metal conductors, wires and cables, semiconductors, powders, and other fields. The company is located in Xiamen Torch High tech Development Zone Entrepreneurship Park. As a qualified supplier selected by Southern Power Grid and State Grid, Xiamen Tianyan Instrument Co., Ltd. has a group of experienced and skilled product development engineers and a high-quality team skilled in management. The company has multiple patents and software copyrights for core technologies of high-tech testing instruments, and has passed ISO9001 quality management system certification, filling the gap in domestic high-tech testing instruments. We have independently developed the sigma2008 series portable digital metal conductivity meter using eddy current phase method and the TX-300A and B series intelligent wire resistivity measuring instrument using current voltage drop four terminals. We have obtained multiple national patents and software copyrights, with advanced technical performance and complete functions, widely used in metallurgy, power, wire and cable, aerospace, nuclear industry, military industry and other sectors. Practical cases include: Inner Mongolia Baotou Aluminum Industry Co., Ltd., Shanxi Huaze Aluminum and Electric Co., Ltd., Guangxi Hualei New Materials Co., Ltd., Liaoning Copper Industry Group Co., Ltd., Shenyang Jinchang Lanyu New Materials Co., Ltd., Zhejiang Huayuan Copper Industry, TBEA Group, Shanghai Jiao Tong University, North China Electric Power University, Xi'an University of Technology, Wuhan University of Technology, Central South University, Tianjin University of Technology, Nanchang University of Aeronautics and Astronautics, and Shenyang University of Aeronautics and Astronautics. Institute of Nuclear Industry Physical and Chemical Engineering, Hefei Academy of Physical Sciences, Chinese Academy of Sciences, Beijing Nonferrous Metals Research Institute, Shanghai Cable Research Institute, China Electronics Technology 46th Institute, Chongqing Southwest Aluminum Alloy Research Institute, Suzhou Institute of Metrology and Testing, Zhenjiang Product Quality Supervision and Inspection Center, Yixing Institute of Quality and Technical Supervision. Delixi Group, Hefei ABB, Zhuzhou CSR Electromechanical, Zhongtian Rocket, Xi'an International Aviation, Shenzhen Basba Technology, Shanghai Electric Pioneer, Huichuan Technology, Changgao Switching Electrical, Jinguan Electric, Sigma Electric, Junteng Electric, Shenhuan Cable, Yinbang Metal, Zhongyuan New Materials, Tengkai Metal, Aumino Electric, Zhengwei Electric, Dongya Electromechanical, Torch Special Metals, Jinri Aluminum, Yinhu Electrical Equipment...... As well as being used by enterprises, research institutions, and universities in Shanghai, Beijing, Guangdong, Zhejiang, Jiangsu, Jiangxi, Fujian, Sichuan, Anhui, Shaanxi, Hunan, Taiwan, and Hong Kong, the products are sold to countries such as Europe, America, Japan, South Korea, and Southeast Asia.