Keliang Testing Group has set up metrology labs covering optics, electromagnetism, geometry, mechanics, thermology, and chemistry. They have over 900 CNAS-accredited metrology items (including 2,000+ parameter ranges) and hold CMA qualifications from Guangdong's Market Supervision Administration. Their calibration services cover geometric, thermal, mechanical, electromagnetic (including magnetics), radio, optical, chemical instruments, and other testing equipment. They can issue calibration certificates the same day, offer fast service, provide internal inspector training, and even support overseas clients with on-site service anytime!