ISO 18132-1:2011确立了LNG运输船或浮式储罐上用于液化天然气（LNG）监护转移测量的自动罐式液位计（ATG）的精度、安装、校准和验证的一般原则。 ISO 18132-1:2011中所述的LNG要么完全制冷（即在低温条件下），要么部分制冷，因此液体处于或接近大气压。 ISO 18132-1:2011还规定了数据收集、传输和接收的技术要求。附件中给出了各种自动液位计的具体技术要求和精度限制。

ISO 18132-1:2011 establishes general principles for the accuracy, installation, calibration and verification of automatic tank gauges (ATGs) used for custody transfer measurement of liquefied natural gas (LNG) on board an LNG carrier or floating storage. The LNG described in ISO 18132-1:2011 is either fully refrigerated (i.e. at the cryogenic condition), or partially refrigerated, and therefore the fluid is at or near atmospheric pressure. ISO 18132-1:2011 also specifies the technical requirements for data collection, transmission and reception. Specific technical requirements for various automatic tank gauges and accuracy limitations are given in the annexes.