Working Principle and Core Advantages of Diffused Silicon Liquid and Gas Pressure Sensors

As a core component for industrial measurement，the working principle of diffused silicon liquid and gas pressure sensors directly affects the performance of products such as the PT124B series。This article provides an in-depth analysis of the sensing principles of models such as PTX5072-TB and CLG-D，helping technical evaluation personnel understand key selection points and learn about the quality differences and application scenarios of products such as KYB-C2/AST-B。

The core of a diffused silicon pressure sensor lies in its sensing element——the silicon diaphragm。When external pressure acts on the diaphragm，the diaphragm undergoes micro-deformation，causing changes in the resistance value of the piezoresistive resistors embedded in it。Through a Wheatstone bridge circuit，the resistance change is converted into an electrical signal output，thereby enabling pressure measurement。This principle determines that the sensor features high sensitivity，fast response，and excellent stability。

Analysis of the Technical Characteristics of PT124B Series Sensors

As a representative product of diffused silicon sensors，the technical parameters of the PT124B series directly reflect the advanced nature of this technology。Taking the PT124B-210-1.6MPa-M20 model as an example，its measurement accuracy can reach ±0.1%FS，and its temperature compensation range covers -40℃ to 100℃，enabling it to adapt to harsh industrial environments。The series products use a 316L stainless steel isolation diaphragm combined with a diffused silicon core，ensuring long-term stability when measuring corrosive media。

It is worth noting that the PT124B-210-25MPa-M20 model achieves reliable measurement in high-pressure environments through a special structural design。Its core innovation lies in the use of a dual isolation diaphragm structure，which transmits pressure through silicone oil，protecting the sensing element while ensuring measurement accuracy。This design concept demonstrates clear advantages in high-pressure application scenarios such as petrochemical and power industries。

Mainstream Model Comparison and Selection Guide

When facing different models of diffused silicon pressure sensors such as PTX5072-TB-A1-CA-H0-PB and KYB-C2，technical evaluation personnel need to consider multiple dimensions comprehensively：

For scenarios requiring higher integration，you may consider the Domestic Capacitive Pressure Transmitter BST6800-SP Digital Display Transmitter Intelligent Differential Pressure Transmitter，which adopts digital compensation technology and offers a turndown ratio of up to 40:1，making it especially suitable for industrial sites requiring wide-range coverage。

Typical Applications and Maintenance Points of Diffused Silicon Sensors

In the metallurgical industry，CLG-D series sensors are commonly used for monitoring hydraulic systems of continuous casting machines，and their anti-vibration design can effectively handle equipment vibration interference。During installation，attention should be paid to the following：the medium temperature should not exceed the rated value，and sudden cooling or heating should be avoided to prevent diaphragm stress fatigue；the condition of seals should be checked regularly to prevent medium leakage from corroding the sensor body。

For the PT124B-210-0.6MPa-M20 sensor used in petrochemical installations，zero-point calibration is recommended every 6 months。Practical applications show that using constant-current power supply（such as a 24VDC two-wire system）can significantly improve signal transmission stability，which is especially important for long-distance measurement。

Quality Evaluation and Purchasing Recommendations for Diffused Silicon Sensors

When evaluating the quality of diffused silicon pressure sensors，focus should be placed on three indicators：long-term stability（recommended requirement ±0.15%/year），temperature influence（±0.5%/55℃ is considered an excellent industry level），and overload capacity（at least 150%FS）。The main difference between KYB-C2 and KYB-C3 is that the latter adds an intrinsically safe explosion-proof design，making it suitable for hazardous areas。

When purchasing genuine CLG-D sensors，it is recommended to buy through authorized channels and verify the product serial number and factory inspection report。High-quality manufacturers usually provide complete technical support，including installation guidance，commissioning services，and regular calibration reminders。

Technological Innovation and Industry Development Trends

The latest generation of diffused silicon sensors has begun to integrate intelligent diagnostic functions，for example，the AST-B series can perform self-detection of temperature drift and zero drift。The introduction of technologies such as wireless transmission and multi-parameter measurement is expanding the application boundaries of pressure sensors。In the field of instrument processing，miniaturized design enables sensors to be embedded in more compact equipment spaces。

Breakthroughs in digital compensation technology have significantly improved product performance。Represented by BST6800-SP，intelligent transmitters achieve nonlinear correction through built-in microprocessors，improving overall accuracy by an order of magnitude。These products demonstrate unique value in condition monitoring of power systems。

Summary and Professional Recommendations

The selection of diffused silicon liquid and gas pressure sensors requires comprehensive consideration of the measured medium，environmental conditions，and accuracy requirements。The PT124B series is suitable for conventional industrial applications，while dedicated models such as PTX5072-TB or KYB-C3 can be selected for special operating conditions。It is recommended to establish a regular maintenance system to extend the service life of sensors。

For demanding applications requiring a turndown ratio of 40:1 and accuracy of ±0.1%，the Domestic Capacitive Pressure Transmitter BST6800-SP provides a reliable solution。Its rugged anti-vibration design and high compatibility make it particularly suitable for harsh environments such as metallurgy and petrochemicals。If you need a technical solution for a specific model，please contact our engineering team for professional selection support。