Working Principle of Diffused Silicon Liquid and Gas Pressure Sensors

As a key device in industrial automation，the PT201H-G5000M pressure transmitter uses advanced semiconductor strain technology in its core component，the diffused silicon liquid and gas pressure sensor。When external pressure acts on the sensor，the silicon diaphragm undergoes slight deformation，causing the resistance value of the embedded Wheatstone bridge to change，thereby outputting an electrical signal with a linear relationship to the pressure。This sensing method based on the piezoresistive effect features fast response speed（rise time≤5 milliseconds）and high accuracy（up to Class 0.25），making it especially suitable for scenarios requiring rapid response，such as hydraulic and pneumatic control systems。

Three Major Advantages of the Core Technology

1. Temperature Compensation Technology：Through a built-in temperature sensor and dedicated compensation circuit，temperature drift（≤±0.05％FS/℃）is effectively suppressed，ensuring measurement stability within the medium temperature range of -30～+85℃。2. Stainless Steel Isolation Diaphragm：316/304 stainless steel is used as the medium-contact material，ensuring corrosion resistance while withstanding overload pressure of 2 times the full scale。3. Signal Processing Optimization：A differential amplification circuit combined with a V/A conversion module can output multiple standard signals such as 4～20mA and 0～10V，compatible with the vast majority of control systems。

Typical Application Scenarios and Selection Points

In the petrochemical industry，the HM20-1-A1-F1-W2-T model is often used for pipeline pressure monitoring，and its wide measuring range of 0～250MPa can cover the entire process from raw material transportation to finished product storage。The domestic aviation-plug pressure transmitter PT301B compact negative-pressure pressure sensor is more suitable for space-constrained scenarios such as locomotive braking systems due to its compact size（only Φ22×80mm）。During selection，three parameters should be focused on：measurement medium compatibility（corrosive gases require special treatment），long-term stability index（typical ±0.1％FS/year），and explosion-proof certification requirements（ATEX certification is required for chemical sites）。

Performance Parameter Comparison Table

Common Problem Solutions

Q：How to determine whether a diffused silicon sensor is damaged？ A：First check the zero-point output（it should be 4mA or 0V when there is no pressure），then apply 50% range pressure to observe linearity，and finally test whether temperature drift exceeds the standard value of ±0.05％FS/℃。Q：What should I do if the MTPFU-MTPFU model displays abnormally？ A：90% of faults are caused by power supply interference，so it is recommended to use a regulated power supply and check whether the grounding resistance is ＜4Ω。For models with LCD displays such as YM-MAZ，calibration can first be performed through the range adjustment knob（±20% range）。

Industry Development Trends

With the advancement of Industry 4.0，smart transmitters such as vegabar-GV3 have begun to integrate HART protocol and IO-Link interfaces，supporting remote parameter configuration and fault diagnosis。In the next three years，ceramic piezoresistive technology may become a strong competitor to diffused silicon sensors，especially in the field of high-temperature（＞150℃）measurement。However，for now，diffused silicon technology，with its ultra-high accuracy of Class 0.1，remains the preferred choice for scenarios such as constant-pressure water supply and building automation。

Why Choose a Professional Supplier

Products such as P200S-GB10CG12M4S purchased through official channels are equipped with a unique serial number marked by laser，enabling traceability for original factory warranty。We provide full life-cycle services from selection consultation（including pressure type selection：gauge pressure/absolute pressure/vacuum）and installation guidance to regular calibration。All products have passed ISO9001 quality management system certification，ensuring that you obtain a measurement experience with the same quality as international brands such as PT124B-210-100MPa-G1/4。