A pressure sensor is an important component of a pressure detection system, which converts the measured pressure signal into an easily measurable electrical signal through various pressure sensitive elements and outputs it to display the pressure value on a display instrument or for control and alarm purposes. Pressure sensors are an important component of pressure detection systems. In daily life, we can always see various types of pressure sensors. Small pressure sensors are designed with ultra small structures, which not only require the sensor to have a sufficiently high response frequency in measuring flow fields, underwater warfare, aviation experiments, engine experiments, and other occasions, but also have a small volume. Not only does the response frequency be high, but the volume is also very small, with a minimum diameter of only 4mm. They are small in size, light in weight, and compact in structure. The conditioning circuit is amplified and normalized by broadband, with good stability, high reliability, and no impact on the bandwidth of sensitive components. They play an important role in working conditions that require high frequency response and small volume. The advantages of small pressure sensors include ultra small structural design, laser marking, and wide temperature resistance. Strong recognizability, capable of pressure measurement in various working conditions and narrow spaces. ② Widely used as the tested medium, it can measure oil, water, and paste materials compatible with 316 stainless steel and 304 stainless steel, and has certain properties The anti-corrosion ability. ③ High accuracy, high stability, advanced technology selection, long service life, and high temperature stability. ④ Small size, light weight, easy to install, debug, and use. Stainless steel fully enclosed shell, ⑤ pressure sensor directly senses the pressure of the measured liquid level, without being affected by medium foaming or deposition. Transmitting pressure signals to electronic devices and displaying pressure on them Small pressure sensors are widely used in industries such as aerospace, power, sewage treatment, water supply, petrochemicals and pharmaceuticals, thermal power units, air conditioning units, refrigeration units, laboratory pressure calibration, industrial process pressure detection and control, internal combustion engines, engines, hydraulic and pneumatic systems, constant pressure water supply systems, etc. for liquids, gases, and steam.