Pressure gauge refers to an instrument that uses elastic elements as sensitive components to measure and indicate pressures higher than ambient pressure. It is widely used in almost all industrial processes and scientific research fields. It can be seen everywhere in fields such as thermal pipelines, oil and gas transmission, water and gas supply systems, vehicle maintenance and repair shops, etc. Especially in industrial process control and technical measurement processes, the elastic sensitive components of mechanical pressure gauges have high mechanical strength and convenient production characteristics, making them increasingly widely used.