The Revision of the SI
The International System of Units (SI) forms the foundation of measurements. It defines the seven base units, the derived units and the prefixes. On 16th November 2018, the 26th meeting of the General Conference on Weights and Measures (CGPM) passed a resolution to revise four of the seven SI base units, namely, the kilogram, the ampere, the kelvin and the mole. The revision brings an end to the use of physical artifacts to define measurement units by linking all SI base units to fundamental physical constants. It guarantees the stability and universality of these base units. The adopted changes will be implemented worldwide on 20th May 2019, the next World Metrology Day. More details are here.
World Metrology Day 2019
The theme for World Metrology Day 2019 is "The International System of Units - Fundamentally better". The 2019 poster was designed by the Standards and Calibration Laboratory, Hong Kong, China.
The poster can be downloaded from here.
|The Standards and Calibration Laboratory at Wanchai, Hong Kong|
The Standards and Calibration Laboratory (SCL) of the Innovation and Technology Commission is responsible for maintaining the reference standards of physical measurements for Hong Kong. These standards are metrologically traceable to the International System of Units (SI).
The SCL provides calibration services to users of measurement standards and measuring instruments to ensure measurement accuracy and proper metrological traceability. In addition, the SCL also provides proficiency testing provider (PTP) services to laboratories in the testing and certification industry to demonstrate their technical competence.
Accredited by the Hong Kong Laboratory Accreditation Scheme (HOKLAS), the SCL implements a management system that complies with HOKLAS regulations and the requirements of ISO/IEC 17025 for calibration services and ISO/IEC 17043 for PTP services.
The SCL's Certificates of Accreditation:
|Calibration service||PTP service|
The SCL has the following laboratories in two different locations:
(a) Main laboratory on 35/F & 36/F of Immigration Tower in Wanchai :
(b) Branch Laboratory on G/F of Public Works Central Laboratory Building in Kowloon Bay: