Technical Origin and Manufacturing Process of Diffused Silicon Hirschmann Sensors

As a core component in the field of flow control equipment, the FST800-202 pressure transmitter has attracted significant attention for the outstanding performance of its diffused silicon Hirschmann sensor. This article provides an in-depth analysis of its manufacturing process and origin traceability, and offers professional reference for technical evaluators from the perspectives of the technical characteristics, accuracy performance, and matching instrument selection of products ranging from PT124B-219 to the TXY-TXY series.

I. Core Technical Principles of Diffused Silicon Hirschmann Sensors

The core of the diffused silicon Hirschmann pressure sensor lies in the piezoresistive effect on its silicon chip. When external pressure acts on the sensor, the silicon chip deforms, causing its resistance value to change. This change is converted into an electrical signal through a Wheatstone bridge, and is ultimately output as a standard 4～20mA signal. The FST800 series uses original German Hirschmann silicon chips, with a temperature compensation range of 0～70℃ and temperature drift controlled within ±0.05%FS/℃, ensuring stability in complex environments such as hydraulic control and building automation.

II. Origin and Process Details of the FST800-202 Pressure Transmitter

As a national high-tech enterprise, Xi'an Shenghongchuang Instrument Co., Ltd. manufactures the FST800-202 pressure transmitter using the same original packaging process as the YBX-YBX series. Key manufacturing steps include:

• Silicon chip cutting: laser micromachining technology is used to ensure a wafer thickness tolerance of ±0.5μcm
• Vacuum bonding: permanent sealing of the silicon chip and glass substrate is completed in a 10^-6Torr environment
• Temperature aging: products with stability up to ±0.1%FS/year are screened through -40～90℃ cyclic testing

This process enables the product to maintain Class 0.25 accuracy in scenarios such as petrochemical and thermal power generating units, forming a technical complement to the domestic flat diaphragm pressure transmitter SSM-P214 threaded compact pressure sensor, the latter having unique advantages in compact integrated LCD display and threaded installation.

III. Comparative Analysis of Key Performance Indicators

It is particularly worth noting that models such as FST800-213/FST800-211A use 316 stainless steel for medium-contact materials, delivering longer service life in corrosive environments such as power station operation inspections. Meanwhile, the SSM-P214 series, with its wide range coverage of 0～250MPa, has become an ideal choice for industrial process detection.

IV. Supporting Instruments and System Integration Solutions

The YLT-YLT101 pressure transmitter supporting instrument system adopts a modular design and supports the following expansion functions:

1. Electrical connection with IP65 protection level through a DIN connector
2. Configuration of a meter head with switching output to realize equipment interlock control
3. Compatible with control systems with 1～5VDC three-wire signal input

In constant-pressure water supply systems, this solution works with the ≤5 millisecond rise time characteristic of the FST800 series transmitters to achieve precise regulation of pressure fluctuation control within ±0.2%.

Technical Evaluation and Selection Recommendations

For technical selection in different application scenarios, it is recommended to refer to the following decision matrix:

• High-accuracy requirements: give priority to the TXY-TXY series Class 0.1 products, whose total error is reduced by 60% compared with conventional models
• Extreme temperature environments: choose FST800-201/202 models with a storage temperature of -40～90℃
• Space-constrained scenarios: recommend the domestic flat diaphragm pressure transmitter SSM-P214 threaded compact pressure sensor, whose M12×1 threaded installation saves 50% space

Summary and Technical Service Support

All pressure transmitter products of Xi'an Shenghongchuang Instrument Co., Ltd. are laser-marked to ensure traceability, and professional technical support is provided, including zero/span adjustment. Whether it is accessory replacement for the FST800-214 or usage guidance for the YBX-YBX series, our engineering team can provide complete solutions. Contact our technical consultants now to obtain a customized pressure detection system design solution.