Shenzhen Tiansu Calibration and Testing Co., Ltd. is a comprehensive third-party quality technical service organization founded in 2009 and headquartered in Shenzhen, Guangdong Province, China. The company specializes in metering, calibration, testing, certification, and professional technical services across ten major metrology fields, including geometry, thermology, mechanics, electromagnetism, radio, time and frequency, acoustics, optics, chemistry, and ionizing radiation, as well as specialized measurement instruments. It also conducts testing for consumer batteries, power batteries, and energy storage batteries, alongside calibration, system certification, and technical consulting. Serving diverse industries such as biotechnology and medicine, medical apparatus, automobiles and spare parts, electronics and electrical, new energy and materials, petrochemicals, national defense, rail transit, and food and agriculture, the firm operates 22 metrology laboratories and 4 testing bases nationwide, forming a grid-based, digital, and shared smart laboratory service system. Accredited by CNAS, DILAC, CMA, UL, and CQC, Shenzhen Tiansu Calibration and Testing Co., Ltd. upholds principles of fairness, science, accuracy, and integrity, contributing to China's advanced measurement infrastructure and industrial quality enhancement.