Hydrometry. Open channel flow measurement using rectangular broad-crested weirs Ingestion-build-46800 BS EN ISO 20558-2:2019 supersedes

BS EN ISO 20558-2:2019 supersedes EN ISO 20558-2:2019 which has been withdrawn

BS EN ISO 21649 applies to needle-free injectors primarily intended to administer medicinal products to humans

The method does not measure the mass concentration of particles Directly

• The cataloguing of datasets

Definitions of competence and professional

Hydrometry. Open channel flow measurement using rectangular broad-crested weirs Ingestion-build-46800 BS EN ISO 20558-2:2019 supersedes1 Scope This International Standard lays down requirements for the use of rectangular broad crested weirs for the accurate measurement of flow of clear water in open channels under free flow conditions.