The pressure transmitter adopts a precision machined core and a silicon diffusion injection process for sensitive components, forming a Wheatstone full bridge. An anti-interference resistor is built inside the bridge. When pressure is applied to the core, the resistance value is compared with the previous state to generate an MV signal proportional to the pressure. After being converted into a standard electrical signal through a secondary amplification circuit, the amplification circuit uses imported processing chips, high stability, high-precision silicon resistance full bridge, dedicated integrated circuit automatic calibration, strong temperature drift resistance, 4-20mA or communication RS485 output. The core is made of 316 stainless steel material, corrosion-resistant and high-temperature resistant