Introduction

When purchasing the TS-TS205 pressure transmitter, how to identify low-quality diffused silicon sensors has become a key challenge for technical evaluators. The selection of diffused silicon liquid and gas pressure sensors directly affects measurement accuracy and equipment service life. This article will reveal the typical characteristics of inferior products to help you avoid procurement pitfalls. As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrument Co., Ltd. will help you understand the core principles and application essentials of diffused silicon sensors.

Core Principles and Selection Essentials of Diffused Silicon Sensors

Diffused silicon pressure sensors use the piezoresistive effect of semiconductor materials to convert pressure signals into electrical signals through diffused resistors on silicon chips. Their core advantages lie in high sensitivity, fast response, and excellent stability. During selection, technical evaluators need to focus on the following parameters:

• Measurement range: Select an appropriate range according to actual application requirements to avoid sensor damage caused by operation beyond the range
• Combined accuracy: High-quality diffused silicon sensors can usually achieve an accuracy of 0.1%~0.5%FS
• Temperature compensation: Good temperature compensation technology can significantly reduce the impact of ambient temperature changes on measurement accuracy
• Long-term stability: The annual drift of high-quality products should be less than ±0.2%FS

For special application scenarios, such as petrochemical plants or power plants, the sensor's explosion-proof performance and media compatibility must also be considered. Taking domestic level transmitter 7MF1570 fire water tank and pool level sensor as an example, it uses a 316L stainless steel isolation diaphragm and offers excellent corrosion resistance, making it particularly suitable for harsh environments such as chemical industry and municipal water supply.

Five Key Identification Features of Low-Quality Diffused Silicon Sensors

1. Material and Process Defects

Inferior products often use low-cost silicon chips and non-standard diffusion processes, resulting in low sensor sensitivity and large temperature drift. They can be identified through the following features:

• The housing material does not match the claimed specification (for example, claiming stainless steel but actually using ordinary steel)
• Rough welding process, with obvious pores or false welding defects
• Poor sealing performance, making internal circuit corrosion likely in humid environments

2. Falsified Performance Parameters

Inferior sensors often exaggerate key performance parameters, and actual tests often fail to reach the nominal values. It is recommended to verify through the following methods:

• Require the supplier to provide a third-party test report
• Conduct long-term stability testing under actual working conditions
• Compare output consistency under different temperature conditions

3. Poor Temperature Compensation Effect

High-quality diffused silicon sensors use precision laser trimming temperature compensation technology, while inferior products often simplify or omit this key process. They can be identified by the following methods:

• Test zero-point drift within the -10℃~70℃ range
• Observe the curve of sensitivity changing with temperature
• Check whether the product clearly marks the temperature compensation range

Production Process Standards for High-Quality Diffused Silicon Sensors

Diffused silicon sensors produced by regular manufacturers strictly follow the following production process standards:

Taking the production process of Xi'an Shenghongchuang Instrument Co., Ltd. as an example, all sensors must pass strict temperature cycle testing, mechanical vibration testing, and long-term stability testing before leaving the factory, ensuring reliable operation in various industrial environments.

Application Scenarios and Selection Recommendations for Diffused Silicon Sensors

For applications in different industries, the selection priorities for diffused silicon sensors vary:

• Petrochemical industry: Focus should be placed on explosion-proof certification and media compatibility
• Municipal water supply systems: Products with a protection rating of IP65 or above should be selected
• Power industry: Electromagnetic compatibility and anti-interference capability should be considered
• Hydrological exploration: Models with large range and good long-term stability are recommended

For level measurement scenarios such as fire water tanks and pools, it is recommended to choose the domestic level transmitter 7MF1570 with a rigid stem or submersible design. Its fully sealed stainless steel structure and polyurethane cable can effectively resist corrosion in humid environments.

Summary and Recommendations

The key to identifying low-quality diffused silicon sensors lies in understanding their core principles and manufacturing processes, and conducting multidimensional verification through material inspection, performance testing, and process evaluation. It is recommended that technical evaluators, when purchasing:

1. Give priority to manufacturers with a complete quality management system
2. Require suppliers to provide detailed technical documentation and test reports
3. Conduct small-batch trial use to verify performance under actual working conditions

As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrument Co., Ltd. provides full-process support from selection consultation to after-sales service. If you would like to learn more professional advice about the TS-TS205 pressure transmitter or other diffused silicon sensors, please feel free to contact us at any time for customized solutions.