Core Advantages of Diffused Silicon Pressure Sensors in Liquid and Gas Operating Conditions

The diffused silicon sensing technology used in the KYB-C3 pressure transmitter occupies an important position in industrial measurement due to its unique piezoresistive effect. Compared with traditional strain-gauge sensors，diffused silicon elements form a Wheatstone bridge on the surface of the silicon wafer through semiconductor processing，providing higher sensitivity to pressure changes in liquid and gas media（typical value up to 0.05%FS/℃）. Engineering field test data from Xi'an Shenghongchuang shows that，in acidic media measurement in the petrochemical industry，the 316 stainless steel isolation diaphragm of model P-P764 combined with a silicone oil filling system can control temperature drift within ±0.02%FS.

For different medium characteristics，three parameters must be重点 considered for diffused silicon sensors：medium compatibility（refer to ASTM G31 standard），long-term stability（annual drift＜±0.1%FS）and dynamic response speed（rise time of model P-P972≤5ms）. For example，in compressed air systems，it is necessary to select the domestic industrial 2088 pressure transmitter PO2088A industrial explosion-proof pressure sensor with a GL/4 male threaded connection，whose 304 stainless steel housing can effectively resist condensate corrosion.

Matching Principles for Medium Characteristics and Sensor Selection

When measuring viscous liquids（such as petroleum derivatives），priority should be given to the P-P974 series with a protruding diaphragm structure，whose specially designed δ-shaped diaphragm can prevent impurity deposition；for corrosive gases（chlorine，sulfur dioxide，etc.），model P-P962 with a Hastelloy diaphragm is recommended. According to API 6A standard requirements，under operating conditions where burst pressure exceeds 300MPa，a diffused silicon sensor with an overload capacity of 2 times full scale must be selected.

Accuracy and Stability Optimization Solutions for Industrial Scenarios

During power plant operation inspections，the 0.25-class accuracy of the P-P964 pressure transmitter combined with laser trimming technology can control the total error within ±0.15% of the range. Practical cases show that，after a thermal power unit adopted this model，the fluctuation of main steam pressure measurement decreased from the original 1.2% to 0.3%. For hydraulic systems requiring frequent start-stop operation，model PO2088A with a temperature compensation chip is recommended，and its 0～70℃ compensation range can effectively suppress zero drift.

Compliance Essentials for Explosion-Proof Certification and Interface Standards

In hazardous locations such as petrochemical plants and coal mines，explosion-proof pressure transmitters certified by ATEX/IECEx must be selected. In the KYB-C3 series，model P-P981 adopts an intrinsically safe design and complies with GB3836.1-2010 standard requirements. In terms of connections，M20×1.5 thread is a commonly used specification under the European Pressure Equipment Directive (PED)，while projects using American standards mostly require NPT threaded connections.

Genuine Purchase Channels and Quality Verification Methods

There are cases in the market where ceramic sensors are passed off as diffused silicon products，and authenticity can be identified through three tests：first，check whether the product nameplate contains the complete model number（such as P-P972-1A representing the version with LCD display）；second，use a multimeter to measure the zero output，which should be 4.00±0.02mA；finally，perform a step pressure test，and the response curve of the diffused silicon sensor should show typical second-order system characteristics. Every device provided by Xi'an Shenghongchuang comes with a CNAS-certified test report and supports QR code traceability verification.

Technical Matching Recommendations for Typical Application Scenarios

For constant-pressure water supply in building automation systems，model P-P761 with a range of 0～1.6MPa is recommended，and its IP67 protection rating can adapt to humid environments. In high-temperature rolling mill hydraulic stations in the metallurgical industry，the domestic industrial 2088 pressure transmitter PO2088A industrial explosion-proof pressure sensor with medium temperature up to 85℃ should be selected and used together with red copper heat sinks. Special reminder：when measuring oxygen pressure，degreasing treatment must be performed to avoid combustion and explosion accidents.

Summary and Professional Technical Support

Correct selection of diffused silicon pressure transmitters requires comprehensive consideration of three dimensions：medium characteristics，environmental conditions，and accuracy requirements. As a sensor manufacturer with 15 years of experience，Xi'an Shenghongchuang can provide customers with a full range of solutions from P-P782 explosion-proof models to P-P964 high-accuracy models. Our engineering team can assist you with professional services such as medium compatibility testing and range calculation. Please contact us to obtain a customized selection manual.

If you need to learn about the performance of the KYB-C3 pressure transmitter under specific operating conditions，or require technical documents such as explosion-proof certification，please contact our technical consultant team immediately. Call 029-84567890 or visit the official website for online consultation to obtain a free selection evaluation report.