ISO 4064-1:2014 | OIML R 49-1:2013规定了饮用冷水和热水流经充满电的封闭管道的水表的计量和技术要求。这些水表包含指示综合水量的装置。 除了基于机械原理的水表外，ISO 4064-1:2014 |OIML R 49-1:2013还适用于基于电气或电子原理的装置，以及结合电子装置的机械原理，用于测量饮用冷水和热水的体积。 ISO 4064-1:2014 | OIML R 49-1:2013也适用于电子辅助设备。辅助设备是可选的。然而，国家或地区法规可能会强制规定与水表使用相关的一些辅助装置。

ISO 4064-1:2014|OIML R 49-1:2013 specifies metrological and technical requirements of water meters for cold potable water and hot water flowing through a fully charged, closed conduit. These water meters incorporate devices which indicate the integrated volume. In addition to water meters based on mechanical principles, ISO 4064-1:2014|OIML R 49-1:2013 applies to devices based on electrical or electronic principles, and mechanical principles incorporating electronic devices, used to measure the volume of cold potable water and hot water. ISO 4064-1:2014|OIML R 49-1:2013 also applies to electronic ancillary devices. Ancillary devices are optional. However, it is possible for national or regional regulations to make some ancillary devices mandatory in relation to the utilization of water meters.