Pressure gauge (English name: pressuregauge) refers to an instrument that uses elastic components as sensitive components to measure and indicate pressure higher than the ambient pressure. It is widely used in almost all industrial processes and scientific research fields. They can be found everywhere in areas such as heating pipe networks, oil and gas transmission, water and gas supply systems, vehicle repair and maintenance shops, etc. Especially in industrial process control and technical measurement processes, mechanical pressure gauges are increasingly used because of their high mechanical strength and ease of production due to their elastic sensitive components.