This product is used in conjunction with a thermodynamic basic experimental platform to conduct theoretical analysis and experimental research related to the ideal gas law (also known as the ideal gas state equation, PV=nRT) in Engineering Thermodynamics; The equipment is composed of two visual containers, a constant pressure pump, temperature and pressure collection, and a control valve group. Through the cooperation of the pump and valve, the first law of thermodynamics and the ideal gas law can be verified. The air specific heat ratio can be calculated through sensors, and gas thermodynamic processes such as isothermal expansion and constant volume temperature change can be carried out. The data is collected to the thermodynamic basic experimental platform, which is intuitive in principle and convenient for experiments;