Pressure gauges are instruments that use elastic elements as sensitive elements to measure and indicate pressures higher than the ambient pressure. They are widely used in almost all industrial processes and scientific research fields. They can be found everywhere in the fields of thermal pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. Especially in the process of industrial process control and technical measurement, mechanical pressure gauges are increasingly widely used because of their high mechanical strength and easy production characteristics.