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Changsha Builand Info. Tech. Co., Ltd. was founded in February 2018, which is a national hi-tech enterprise located in Changsha City, Hunan Province, China. More than 20 years of experiences, ideas and technical achievements in aviation maintenance has been transplanted to the field of Wind Turbines, Water Turbines, Bridges, High-speed Railway and Automobiles etc. We are dedicated to providing Ultrasonic Bolt Tension Monitoring (BTM) System to solve the toughest tensioning challenges ensuring improvements in overall safety and life-cycle profitability of the bolt joint.Nowadays, products are widely used in several national enterprises in China, such as China Huaneng Group, Datang Group, the State Power Investment Corporation Limited, Goldwind, Dongfang Electric Corporation etc., with reliable quality and good reputation. Meanwhile, we are committed to ensure wind turbine and water turbine bolt joints safer and more reliable towards our customers, with the corporate belief oriented by integrity, pragmaticism, innovation and specialization.The company has acquired over 9 patents and 10 software copyrights. We have passed the quality, Occupational health and environmental management system certification, it regards quality as life by equipped with ISO9001:2015,ISO 45001:2008，ISO 14001:2015 certificates.

Portable Ultrasonic Bolt Tension Measuring Instrument：BTM-C303/T
Online Bolt Tension Monitoring System
Wired Model：BTM-W3122
Wireless Model: BTM-WL3123