Pressure gauge (English name: pressure gauge) refers to an instrument that uses elastic components as sensitive components to measure and indicate higher than environmental pressure. Its application is extremely common, and it covers almost all industrial processes and scientific research fields. It can be seen everywhere in fields such as heating pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. Especially in industrial process control and technical measurement processes, mechanical pressure gauges have been increasingly widely used due to their high mechanical strength and convenient production characteristics of elastic sensitive components.