This gas meter is an intelligent prepaid flow meter suitable for volumetric flow accumulation measurement of combustible gases such as natural gas, liquefied gas, biogas, and urban pipeline gas with a pressure range of (0.5~20) kPa. It is mainly used for gas measurement in industrial and mining enterprises, commercial users, and villas. The meter is connected to the main station through an internal GPRS module and communicates with it, resulting in high meter reading efficiency. The meter reading system does not require additional relay products, and the overall cost of the meter reading system is low.