The DW803-10MPa-C-1-A-Z-0-3 pressure transmitter adopts advanced diffused silicon sensor technology，accurately measuring liquid and gas pressure。This article provides an in-depth analysis of its operating principle，and answers questions about the specifications，calibration methods and common troubleshooting of models such as KYB-C3，helping technical evaluation personnel fully understand the performance characteristics and application scenarios of diffused silicon sensors。

Analysis of Diffused Silicon Sensor Technology

Diffused silicon pressure sensors are one of the core technologies in today’s industrial measurement field，and their core principle is based on the piezoresistive effect。When pressure acts on the silicon diaphragm，the diaphragm undergoes micro-deformation，causing changes in the resistance values of the Wheatstone bridge implanted in the silicon crystal。By measuring the voltage signal output from the bridge，the pressure value can be accurately calculated。The DW803-10MPa-C-1-A-Z-0-3 model uses monocrystalline silicon material，and forms nanoscale strain resistors through an ion implantation process，with linearity better than 0.1%FS。Compared with traditional ceramic capacitive sensors，diffused silicon technology is more sensitive to temperature changes，but temperature drift can be effectively suppressed through full-temperature-range digital compensation technology（-40℃~85℃），with stability reaching ≤0.2%FS/year。It is worth noting that，Domestic capacitive pressure transmitter WDK502 ceramic capacitive pressure transmitter gas-liquid pressure sensor adopts a dry ceramic diaphragm design，and its medium-free liquid characteristic gives it unique advantages in the food and pharmaceutical industries。

Comparison of Key Performance Parameters

Typical Troubleshooting Guide

Technical evaluation personnel often encounter abnormal output signal issues during model selection，which may come from three typical scenarios：first is power supply interference，and it is recommended to check whether the supply voltage is stable within the DC24V±10% range；second is diaphragm blockage caused by medium crystallization，in which case the anti-crystallization design of WDK502 can be referenced，as its ceramic diaphragm surface finish reaches Ra0.1μm；finally is overload protection failure，and it is necessary to verify whether the sensor has an overpressure resistance capability of ≥300%FS。For the KYB-C3 model，its manual specifically emphasizes the importance of periodic calibration——zero-point calibration is required every 6 months，using a standard pressure source to apply four pressure points of 25%，50%，75%，100% of the range，and the recorded output current deviation should be controlled within ±0.5%。

Industry Application Solutions

In aseptic process control in the pharmaceutical industry，the selection of sensor materials is particularly critical。Although diffused silicon sensors offer high accuracy，attention must be paid to the compatibility between sealing materials and the medium；while the 99% alumina ceramic substrate used by WDK502 is FDA certified and can directly contact pharmaceutical raw materials。After a biopharmaceutical company replaced its original diffused silicon sensors with ceramic capacitive sensors，the product contamination rate decreased by 72%，which benefited from the inherent anti-adsorption characteristics of ceramic materials。For wellhead pressure monitoring in oil and gas fields，the IP65 protection and -40℃ low-temperature startup characteristics of the DW803-10MPa demonstrate obvious advantages。

Summary of Technical Evaluation Points

Evaluation of pressure transmitters should focus on five dimensions：long-term stability（it is recommended to require the manufacturer to provide third-party test reports），medium compatibility（especially in strong acid and strong alkali environments），dynamic response speed（diffused silicon is usually superior to ceramic capacitance），temperature influence coefficient（full-temperature-range error band）and the completeness of explosion-proof certification。The WDK502 series has obtained the SIL2 certified safety integrity level，which makes it widely used in the petrochemical industry。For scenarios with limited budgets but high stability requirements，Domestic capacitive pressure transmitter WDK502 ceramic capacitive pressure transmitter gas-liquid pressure sensor can be considered as a supplement to diffused silicon solutions。

Why Choose a Professional Sensor Supplier

A mature sensor manufacturer can not only provide products that comply with ISO9001/14001 system certification，but more importantly，can offer customized solutions for specific application scenarios（such as cleanliness requirements in the food and pharmaceutical industries，and explosion-proof requirements in the petrochemical industry）。We recommend that technical evaluation personnel require suppliers to provide quality tracking reports for at least 12 months，conduct on-site inspections of their aging test laboratories，and verify the metrological traceability of calibration equipment。For pressure monitoring at critical process points，it is recommended to select sensor products certified to API6A。