Division of Metrology in Length and Precision Engineering


The lab devotes itself to studying, developing, improving and maintaining national primary standards of gauge blocks, line scales and optical rotation devices. It provides calibration and metrology services, keeps up with the most advanced technology of the world and guarantees the reliability and accuracy of value tracing. This lab also drafts, edits and revises national standards and metrological specifications, while carries out...

There is no ongoing project.

  • Contact Laser Length Measuring Instrument for Gauge Blocks

    This project developed a gauge block measuring instrument with original techniques and innovation. It forms a major part of national gauge block work primary standard. Its measurement uncertainty reaches international advanced level and it can...

International Cooperation

There is no international cooperation.

National Measurement Standards and CMCs

work primary standard of Gauge Block:  range(0.5~1000)mm; U99=0.02μm+0.1×10-6l

grade 2 verification instrument of gauge block: range (0.5~1000)mm; U99=0.05um+0.5×10-6l

material linear thermal expansion coefficient test device: Uncertainty~1E-9

optical rotation(sugar degree) measurement device: U=0.002°,k=3



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Liu Xiangbin