In the field of industrial automation, the CPT-CPT1 pressure transmitter has become an industry benchmark by virtue of its outstanding diffused silicon technology. This article provides an in-depth analysis of the working principle of diffused silicon pressure sensors, and reveals how products such as the YM-bestace661 series meet various gas and liquid pressure monitoring needs through precise measurement and stable performance, providing professional selection references for business evaluators.

Core Principles and Technical Advantages of Diffused Silicon Pressure Sensors

The core of a diffused silicon pressure sensor lies in the piezoresistive effect of its silicon chip. When 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 proportional to the pressure. Taking the domestic general-purpose pressure transmitter STPTC1 hydraulic oil pneumatic sensor as an example, it uses a 316L stainless steel diaphragm and, combined with temperature compensation technology, can achieve 0.1% high-accuracy measurement in medium environments from -40～+400℃, a technical approach that perfectly solves the pain points of traditional strain-type sensors such as large temperature drift and poor long-term stability.

Comparative Analysis of Key Performance Indicators

In-Depth Analysis of Industry Application Scenarios

In the petrochemical field, the CPT-CPT1 series has become the preferred choice for oil pipeline pressure monitoring due to its corrosion resistance; while the aerospace industry favors the wide-temperature-range performance of the STPTC1 model, and its 4-20mA standard signal output can be directly connected to aircraft control systems. As a high-tech enterprise, Xi'an Shenghongchuang has successfully applied its products to key national projects such as West-East Gas Pipeline and Long March rockets, verifying the reliability of diffused silicon technology under extreme working conditions.

Key Factors in Selection Decision-Making

• Medium characteristics: Corrosive media require a 316L stainless steel diaphragm
• Accuracy requirements: Process control usually selects 0.5%, while metering-grade applications require 0.1%
• Installation method: Threaded installation is suitable for most scenarios, while flange installation is more suitable for high-pressure working conditions
• Certification standards: The petrochemical field must comply with SIL certification, while food and pharmaceutical applications require FDA material certification

Technological Evolution and Market Trends

With the advancement of Industry 4.0, intelligent pressure transmitters are becoming mainstream. The latest CY-4000 series developed by Xi'an Shenghongchuang has integrated the HART communication protocol, supporting remote parameter configuration and diagnostics. Market data shows that in 2023, the penetration rate of diffused silicon sensors in the process industry reached 67%, and it is expected to exceed 80% by 2025, mainly benefiting from their better long-term stability compared with ceramic piezoresistive sensors （＜±0.1%/year）.

Why Choose Xi'an Shenghongchuang

As a national high-tech enterprise in Xixian New Area, we have a complete diffused silicon sensor industry chain: from monocrystalline silicon wafer processing and Wheatstone bridge laser trimming to fully automated temperature compensation production lines. All products undergo a 72-hour aging test before leaving the factory, and we provide a 1-3 year quality warranty. We especially recommend the domestic general-purpose pressure transmitter STPTC1, whose wide-voltage input （12-36VDC） feature can adapt to various complex industrial scenarios. Multiple measuring ranges from 0.6MPa to 2.5MPa are available, supporting flexible wiring methods such as Hirschmann connectors/aviation plugs.

Answers to Typical Customer Questions

Q: How to determine whether a diffused silicon sensor needs temperature compensation?
A: When the operating environment temperature variation exceeds ±10℃, it is recommended to choose a compensated model. For example, the built-in digital compensation module of the LRDG-LRDG series can control temperature drift within ±0.01%/℃.

Q: Does the installation angle affect measurement accuracy?
A: For liquid measurement scenarios such as LD-LD183, it is recommended to keep the pressure port installed facing downward to avoid bubble accumulation, while there are no special restrictions for gas measurement.