Analysis of the Core Functions of Diffused Silicon Pressure Transmitters

As a key component in industrial process control, the YBX series diffused silicon pressure transmitters have become the preferred solution for liquid/gas pressure monitoring due to their outstanding stability and accuracy. Using the sensing principle of the piezoresistive effect of single-crystal silicon, its core component—the diffused silicon sensor—forms a Wheatstone bridge on the silicon wafer surface through semiconductor processing. When external pressure is applied, the resistance change of the bridge arms has a linear relationship with the pressure, enabling high-accuracy measurement of 0.1%FS.

For the measurement range settings of models such as BP-IB, two parameters need special attention: one is the upper range limit (such as 0-1MPa/0-10MPa optional), and the other is overload capacity (usually up to 150%FS). In practical applications, it is recommended to select 316L stainless steel or Hastelloy diaphragms according to the medium characteristics, while a PTFE coating protection solution can be selected for corrosive environments. Test data from Xi'an Shenghongchuang Instrument Co., Ltd. show that within the wide temperature range of -20℃~85℃, the temperature drift of this series of products can be controlled within ±0.02%/℃.

Technical Comparison of Typical Models

Complete Guide to the Installation and Commissioning Process

The correct installation method directly affects the measurement accuracy of YBX pressure transmitters. The wiring of the BP-IE model must strictly follow the four-wire standard: the red wire connects to the positive power terminal (+24VDC), the black wire connects to the negative power terminal, and the green/white wires output the 4-20mA signal respectively. For operating conditions with vibration risks, it is recommended to install an anti-vibration bracket at the threaded connection and ensure that the pressure guide tube length does not exceed 3 meters.

Five-Step Calibration Procedure

1. Connect the regulated power supply and preheat for 15 minutes to stabilize the circuit
2. Use a standard pressure source to apply pressure at three points of 25%/50%/75% of the range
3. Read the current output value through a HART communicator
4. Compare the theoretical value with the measured value; if the error exceeds 0.5%, zero/span calibration is required
5. Sealing test: pressurize to 1.5 times the range and hold for 10 minutes, with pressure drop ≤0.01%

Special reminder: for the TXU-TXU model, the damping adjustment function must be turned off during calibration, while the matching YLT-YLT101 instrument requires the corresponding sensor address code to be set. If nonlinear error occurs, it may be caused by diaphragm deformation or filling fluid leakage, and factory repair is required.

Full Lifecycle Maintenance Strategy

Based on Xi'an Shenghongchuang's field statistics, the PT124B-219 model can have a service life of up to 8 years under normal operating conditions, but the following maintenance points should be noted: check seal ring aging every 6 months; conduct 1 zero drift test every year; in high-impact environments, it is recommended to replace the pressure interface assembly once every 2 years. For original FST800-213 accessories, authenticity can be verified through the laser anti-counterfeiting code, and using non-standard accessories may lead to a permanent decline in accuracy.

Accuracy Attenuation Warning Indicators

• Zero drift amount＞0.3%FS/year
• Insulation resistance＜20MΩ（500VDC test）
• Response time extended by more than 50%
• Step fluctuation appears in the output signal

System Integration Optimization Solution

When YBX transmitters need to be connected to a DCS system, the signal isolator of the matching TXY equipment is indispensable. In gas monitoring scenarios, a dual-transmitter redundancy configuration is recommended, with automatic switching achieved through the YLT101 instrument. For outdoor installations with lightning risks, a surge protector must be installed in the signal loop, and the grounding resistance must be ＜4Ω. Actual cases show that this configuration can increase the system MTBF to more than 100,000 hours.

Quick Reference for Typical Fault Handling

Selection Decision Support System

Business evaluation needs to comprehensively consider five key indicators: corrosiveness of the measured medium (determines diaphragm material), process temperature range (affects compensation algorithm), explosion-proof rating (such as ExdIICT6), protection rating (IP68 is better than IP65), and certification requirements (must comply with SIL2/NEPSI, etc.). Taking the chemical industry as an example, the BP-IF model with FST800-214 accessories can meet the pressure monitoring needs of most reaction kettles, and its TÜV certification can further simplify the acceptance process.

Full-Process Evaluation Checklist

• Technical parameter matching degree (range/accuracy/response time)
• Lifecycle cost (including maintenance/spare parts costs)
• Supplier qualifications (ISO9001/explosion-proof certification)
• Localization service capability (technical support response time)
• Expansion compatibility (whether it can connect to the existing SCADA system)

Conclusion and Professional Support

Mastering the core technical points of diffused silicon pressure transmitters can significantly improve the reliability and cost-effectiveness of industrial measurement systems. As a national high-tech enterprise, Xi'an Shenghongchuang Instrument Co., Ltd. can provide full-chain services from selection consulting to on-site commissioning. All products undergo 72-hour aging tests and third-party metrology certification. Contact our technical engineering team now to obtain a customized YBX series pressure monitoring solution. You can call 029-xxxxxxx or visit the company website to check the detailed technical white paper for models such as BP-IE.