Under extreme operating conditions, the stability of diffused silicon pressure transmitters directly affects industrial process safety. This article provides key data for technical evaluators through measured performance tests of the DPI-DPI701 pressure transmitter in high-temperature, high-humidity, and highly corrosive environments. As a professional sensor manufacturer, Shenghongchuang Instrument will take you through an in-depth analysis of the reliability differences of diffused silicon sensors in different media (liquids/gases).

I. Technical Definition and Core Advantages of Diffused Silicon Sensors

Diffused silicon pressure sensors use a single-crystal silicon chip as the sensitive element, forming a Wheatstone bridge structure through ion implantation technology. Compared with traditional ceramic capacitance or metal strain gauge technologies, its significant advantages lie in: temperature drift less than 0.01%FS/℃ (according to the IEC 60770 standard), and long-term stability up to ±0.1%FS/year. Taking the DPI-DPI701 as an example, it adopts a third-generation diffused silicon chip and has passed the military-grade MIL-STD-810G vibration test, making it particularly suitable for extreme operating condition monitoring in fields such as petrochemicals and electric power energy.

II. Comparison of Measured Data Under Extreme Environments

III. Reliability Differences Between Liquid and Gas Media

Comparative tests on products such as the PMP-PMP5077 and PTX-PTX5022 series show that in gas pressure measurement, diffused silicon sensors require special attention to vibration interference suppression due to the low density of the medium. The DPI-DPI701, however, controls measurement fluctuations under gas operating conditions within ±0.05% through its patented damping chamber structure. In liquid measurement, attention should be paid to media compatibility. This model can be equipped with a Hastelloy diaphragm, offering chloride corrosion resistance 6 times higher than conventional models.

IV. Key Technical Parameters for Procurement Decisions

• Range selection:DPI-DPI701 provides full-range coverage from 0-10kPa to 0-100MPa, and it is recommended to select a model based on 1.5 times the actual maximum working pressure
• Accuracy class:0.075 class is recommended for liquid media, and 0.1 class is recommended for gas media (compliant with the GB/T 17614.3 standard)
• Process connection:For food-grade applications such as GLP-P51, Tri-Clamp sanitary fittings can be provided
• Certification requirements:Explosion-proof type has passed ATEX/IECEx dual certification, and intrinsically safe type meets FM/CSA standards

V. Why Choose Shenghongchuang Instrument

As the only sensor manufacturer in Northwest China to have passed ISO/IEC 17025 calibration laboratory accreditation, we provide the following for the full range of products such as WJ-WJ131 and BL-Y202: ① 48-hour rapid sample customization service; ② the industry's lowest temperature compensation accuracy of -40℃~150℃; ③ a three-year extended warranty commitment. Technical evaluators can apply for free operating condition simulation tests to obtain customized selection reports.

Get the DPI-DPI701 Technical White Paper Now

Scan the QR code or call 029-8856****, and our engineers will analyze the matching solutions between models such as CS-E and MY-02 and your specific operating conditions, and provide measured data of diffused silicon sensors in special scenarios such as LNG ultra-low temperatures and geothermal well high temperatures.