| Metrology area, Sub-field | Length, Dimensional Metrology |
| Description | Gauge blocks by interferometry |
| Time of measurements | 2020 - 2021 |
| Status | Report in progress, draft B |
| References | |
| Measurand | Length 0.5 mm, 2 mm, 2.5 mm, 3 mm, 5 mm, 10 mm, 20 mm, 75 mm, 100 mm, 400 mm and 500 mm |
| Transfer device | Gauge blocks |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | * Shorter gauge blocks (up to 100 mm) are made of steel/tungsten carbide * Long gauge blocks (400 mm and 500 mm) are made of steel. * The Draft A.3 report curculated to the participants on 2 Oct. 2025. * Draft B.1 report submitted to CCL WG-MRA on 20 Oct. 2025. |
| Pilot institute |
KRISS
Korea Research Institute of Standards and Science Korea, Republic of |
| Contact person | Chu-Shik Kang +82 42 868 5103 |
| Pilot laboratory | |
|---|---|
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| CMS |
ITRI Center for Measurement Standards, Chinese Taipei, APMP |
| MSL |
Measurement Standards Laboratory, New Zealand, APMP |
| MUSDD |
Measurement Units, Standards & Services Department, Sri Lanka, APMP |
| NIM |
National Institute of Metrology, China, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMIM |
National Metrology Institute of Malaysia, Malaysia, APMP |
| SCL |
Standards and Calibration Laboratory, Hong Kong, China, APMP |
| SNSU-BSN |
National Measurement Standard - National Standardization Agency of Indonesia, Indonesia, APMP |
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