Differential pressure sensor is a type of sensor used to measure the difference between two pressures. It is a differential pressure measuring element isolated by a stainless steel corrugated diaphragm. The working principle is to use isolation diaphragms to protect both the high and low pressure ends, and both pressure chambers can come into contact with corrosive fluid media. The measured differential pressure is transmitted to the silicon pressure-sensitive element through the isolation diaphragm and the filled brick oil, achieving accurate measurement of differential pressure.