The pressure gauge we usually refer to is an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the environment. It has a wide range of applications. Almost all modern industrial processes and scientific research fields use pressure gauges, such as heat pipe network, oil and gas transmission, water and gas supply systems, and street vehicle maintenance stores that we see every day. Pressure gauges can be seen everywhere. Speaking of this, you may not know much about the working principle and structure of the pressure gauge, right? Today, let's learn about the working principle of the pressure gauge and other details.