Hydrometry. Echo sounders for water depth measurements has-corrigendum Requirements for labelling and syringe

Requirements for labelling and syringe barrels have been revised

This part of EN 71 specifies requirements and test methods for the substances and materials used in chemical toys (sets) other than experimental sets

is typically seen in water systems

Visual inspection is useful in detecting defects or failures in these components

Hydrometry. Echo sounders for water depth measurements has-corrigendum Requirements for labelling and syringe1 Scope This International Standard provides information concerning the principles of operation, selection and performance criteria for echo sounders used in depth measurements for open channel flow (and related) measurements. The use of standard terminology is promoted.