Gas content volume measurement device

The utility model relates to a gas content volume measurement device and aims at measuring the volume of gas more accurately. The gas content volume measurement device is particularly suitable for measuring heterogeneous gas, such as coal bed methane, and belongs to the technical field of gas measurement devices. The gas content volume measurement device is mainly characterized in that the gas content volume measurement device comprises a container, a piston, a pressure sensor, a motor, a pulley mechanism and a fixed angle sensor, wherein the container is provided with a gas inlet and outlet channel; the piston is positioned in the container; the pressure sensor is fixed on the surface of the piston facing a gas cavity; the motor and the pulley mechanism are fixed above the piston in the container; the other end of a pull rope fixed on a shaft of the motor passes around a pulley in the pulley mechanism and is fixed to the piston; the signal outputs of the pressure sensor and the angle sensor are externally co