ISO 4064-2:2005规定了单个、组合和同心水表、相关配件、安装、水表特殊要求的选择标准，以及新的或维修的水表的首次运行，以确保准确的恒定测量和可靠的水表读数。 ISO 4064-2:2005还适用于基于电气或电子原理的水表，以及基于包含电子装置的机械原理的水表，用于测量冷饮用水的实际体积流量。 它也适用于电子辅助设备。 本ISO 4064-2:2005的建议适用于水表，与技术无关，定义为集成测量仪器，持续测定流经水表的水量。

ISO 4064-2:2005 specifies criteria for the selection of single, combination and concentric water meters, associated fittings, installation, special requirements for meters and the first operation of new or repaired meters to ensure accurate constant measurement and reliable reading of the meter. ISO 4064-2:2005 also applies to water meters, based on electrical or electronic principles and to water meters based on mechanical principles incorporating electronic devices, used to meter the actual volume flow of cold potable water. It also applies to electronic ancillary devices. The recommendations of this ISO 4064-2:2005 apply to water meters, irrespective of technology, defined as integrating measuring instruments continuously determining the volume of water flowing through them.