Analysis of the Core Technology of Diffused Silicon Hesseman Sensors

As the core equipment for industrial pressure measurement, the core component of the PT-PT202 pressure transmitter, the diffused silicon Hesseman sensor, adopts the semiconductor piezoresistive effect principle. When external pressure acts on the sensor diaphragm, the resistivity of the silicon crystal changes linearly, and the mechanical deformation is converted into an electrical signal output through a Wheatstone bridge. Compared with traditional strain gauge technology, this design has significant advantages such as good temperature stability, high sensitivity（typical value up to 2mV/V）, and small long-term drift（±0.1%FS/year）.

Accuracy Assurance Mechanism for Pressure Measurement

To ensure that the measurement accuracy of TY-804, CS-PT300 and other series products reaches the 0.1 class standard, the sensor adopts triple compensation technologies:

• Laser-trimmed resistor network: eliminates initial zero-point offset
• Digital temperature compensation chip: corrects temperature drift in real time within the range of -40～85℃
• Stress-isolation structure: reduces the influence of installation torque on measured values

This design enables models such as JPB-JPB2300 to still maintain ±0.25% measurement accuracy in harsh environments such as petrochemical industries, far exceeding industry standards.

Typical Fault Diagnosis and Handling Methods

For common abnormal output problems of the YB-YB3011 pressure transmitter, operators can troubleshoot through the following steps:

Key Points of System Integration and Maintenance

For equipment such as TS-802 that requires long-term operation, it is recommended to perform the following maintenance every 6 months:

1. Carry out zero-point calibration with reference to the calibration specification of the PT-A pressure transmitter
2. Check the aging condition of the IP65 protection-grade sealing ring
3. Test whether the response time of the MT-A pressure transmitter is ≤1ms

In liquid level measurement scenarios, it can be used together with domestic liquid level transmitter BL-YW500 LCD display explosion-proof liquid level sensor, whose 316L stainless steel material and explosion-proof design are particularly suitable for hazardous places such as oil tanks.

Industry Applications and Selection Guide

Different industrial scenarios have special requirements for pressure transmitters:

• Hydraulic systems: select models with an overload capacity of 150%FS
• Food and pharmaceutical: must comply with hygienic-grade 316L stainless steel standards
• Explosive environments: intrinsic safety explosion-proof certification must be equipped

The diffused silicon sensors of Xi'an Shenghongchuang Instrument Co., Ltd. have passed 2 million pressure cycle tests, with a mean time between failures reaching 100,000 hours, providing reliable assurance for industrial process control.

Technological Evolution and Future Trends

The new generation of pressure transmitters is developing toward intelligence:

• IO-Link digital communication interface enables remote parameter configuration
• Self-diagnosis function can predict remaining service life
• Multi-parameter measurement（pressure + temperature composite sensor）

Professional Maintenance and Technical Support

To fully leverage the performance advantages of equipment such as PT-PT202, it is recommended to:

• Establish a regular calibration plan（with reference to the GB/T 17614 standard）
• Keep complete operation logs for fault analysis
• Use original factory parts for maintenance and replacement

If you would like to learn about application solutions of diffused silicon Hesseman sensors under specific working conditions, please contact our technical team for customized recommendations.