As a core component in industrial automation, the working principle of diffused silicon liquid and gas pressure sensors directly affects the measurement accuracy of transmitters such as PD50-AB100BM20M4B. This article provides an in-depth analysis of the technical principles of diffused silicon sensors, combined with practical application cases of models such as DG1300-BZ-A-2-4/AF, to offer technical evaluators a reference for model selection and a guide for troubleshooting.

I. Core Principles of Diffused Silicon Pressure Sensors

Diffused silicon technology is based on the semiconductor piezoresistive effect, forming a Wheatstone bridge by diffusion doping on a silicon diaphragm. When the PD50-AB100BM20M4B transmitter comes into contact with the medium, the applied pressure causes deformation of the silicon crystal lattice, and the resistance change is converted into a standard 4-20mA output through the signal conditioning circuit. Compared with traditional strain gauge technology, diffused silicon sensors offer advantages such as high sensitivity（typical value 1.5mV/V）and good long-term stability（±0.1%FS/year）, which is also the key reason why models such as FST800-501P341G-100B are widely used in oil and gas pipeline monitoring.

II. Comparative Analysis of Key Technical Parameters

As can be seen from the comparison, the JVPL-JVPL16 model is specifically designed for micro-pressure measurement, while TK-509-10 is suitable for high-pressure hydraulic systems. During technical evaluation, special attention should be paid to safety parameters such as overload capacity（usually 1.5 times the measuring range）and burst pressure（≥3 times the measuring range）.

III. Analysis of Typical Application Scenarios

In the petrochemical industry, the BAR-ZZAZ pressure transmitter uses a 316L stainless steel isolation diaphragm, perfectly solving the problem of sulfide corrosion. A case study from a refinery shows that after using the FST800-501P341G-400B, the pressure control accuracy of the catalytic cracking unit increased by 30%, and annual maintenance costs were reduced by 150,000 yuan. In the food and pharmaceutical fields, more attention is paid to hygienic design, for example, the 3A-certified structure of the PD50-AB100BM20M4B can meet GMP requirements.

IV. Key Indicators for Procurement and Selection

• Medium characteristics：For corrosive media, choose DG1300-BZ-A-2-4/AF with a Hastelloy diaphragm
• Ambient temperature：For a wide temperature range of -40~125℃, the FST800 series is optional
• Output signal：HART protocol models are 20% more expensive than traditional 4-20mA, but they facilitate remote diagnostics
• Certification requirements：For explosion-proof applications, the ATEX-certified JVPL-JVPL16 must be selected

V. Common Troubleshooting Guide

When zero drift occurs in the FST800-501P341G-10B, first check whether the pressure guide tube is blocked. If the output of TK-509-10 fluctuates abnormally, it is recommended to use a multimeter to check whether the supply voltage is stable（24VDC±10%）. The PD50-AB100BM20M4B provided by Xi'an Shenghongchuang comes standard with an IP67 protection rating, effectively preventing circuit board failures caused by water vapor infiltration.

VI. Why Choose Xi'an Shenghongchuang

As a national high-tech enterprise, we have 18 patented pressure sensor technologies, and all models have passed ISO9001:2015 system certification. For products such as DG1300-BZ-A-2-4/AF, we provide an ultra-long 3-year warranty and support free technical consultation and on-site calibration services. Call 029-8856XXXX now to get an exclusive quotation plan for the FST800 series.

VII. Outlook on Technology Development Trends

With the advancement of Industry 4.0, the next generation of BAR-ZZAZ transmitters will integrate wireless transmission functions（such as the LoRaWAN protocol）. Xi'an Shenghongchuang is developing an intelligent diagnostic system combining MEMS+AI, which can predict the life attenuation of the PD50-AB100BM20M4B 30 days in advance. This technology is expected to enter the market in 2024.