ISO 4373:2022 PDF

Scope: This document specifies the functional requirements of instrumentation for measuring the level of water surface (stage), primarily for the purpose of determining flow rates. This document is supplemented by Annex A, which provides guidance on the types of automatic water level measurement devices currently available and the measurement uncertainty associated with them. The manually operated measuring devices are described in Annex B. This document is applicable to both contact and non-contact methods of measurement. The non-contact methods are not in direct material contact with the water surface but measure the height of the water level with ultrasonic or electromagnetic waves.

ISO 4373:2022 Referenced Document

IEC 60529 Degrees of Protection Provided by Enclosures (IP Code) (Edition 2.1 ***Applies to French text only***)*， 2024-04-22 Update
ISO 772 Hydrometry — Vocabulary and symbols

2022 ISO 4373:2022 Hydrometry — Water level measuring devices
2008 ISO 4373:2008 Hydrometry - Water level measuring devices
1995 ISO 4373:1995 Measurement of liquid flow in open channels - Water-level measuring devices
1979 ISO 4373:1979 Measurement of liquid flow in open channels; Water level measuring devices