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Standard Type : Main
Document No : ISO 4373:2022
Document Year : 2022
Pages : 27
Edition : 4
Section Volume : Instruments, equipment and data management (ISO/TC 113/SC 5.)
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.