The Pt series diffusion silicon pressure transmitter is a new generation of pressure transmitter produced by using imported chips, after careful structural design, signal processing and assembly, and testing in accordance with national standards and enterprise standards. The basic principle is to use the piezoresistive effect and micromachining technology of semiconductors, use lithography, diffusion and other semiconductor processes to make a Wheatstone bridge, form a sensitive diaphragm, when under the action of external force, produce microstrain, resistivity changes, so that the resistance of the bridge arm changes (one pair becomes bigger and one pair becomes smaller) and then excites the voltage signal output, through computer temperature compensation, laser resistance regulation, signal amplification and other processing methods and strict assembly testing, calibration and other processes, to produce a pressure transmitter with standard output signal.