UNE-EN ISO 4064-1:2025

This part of ISO 4064|OIML R 49 specifies the metrological and technical requirements for watermeters for cold potable water and hot water flowing through a fully charged, closed conduit. Thesewater meters incorporate devices which indicate the accumulated volume.In addition to water meters based on mechanical principles, this part of ISO 4064|OIML R 49 applies todevices based on electrical or electronic principles, and mechanical principles incorporating electronicdevices, used to measure the volume of cold potable water and hot water.This part of ISO 4064|OIML R 49 also applies to electronic ancillary devices. Ancillary devices areoptional. However, it is possible for national or regional regulations to render some ancillary devicesmandatory in relation to the utilization of water meters.NOTE Any national regulations apply in the country of use.