asurement of fluid flow in closed conduits — Clamp-on ultrasonic transit-time meters for liquids and gases

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Number

2025/680
Issue date

05-11-2025
Expiration date

05-01-2026
Status

Finished

Description

This document specifies requirements and recommendations for non-intrusive (clamp-on) ultrasonic flowmeters (USMs), which use the transit time of ultrasonic signals to measure the volumetric flowrate in closed conduits. Transit time flowmeters are predominantly used on single-phase fluids (liquid and gases) but can also be used where small quantities of additional phases are present.

This document specifies performance, calibration, and output characteristics, and deals with installation conditions.

International reference number

ISO 24062:2023

Project type

Adoption