Common Causes of Unstable Remote Transmission Signals in Diffused Silicon Pressure Sensors

In industrial automation control systems, the stability of the remote transmission signal of diffused silicon pressure sensors directly affects the reliability and safety of the entire process. Many users encounter problems such as signal fluctuation and transmission interruption during application, which are usually caused by the following factors:

• Electromagnetic interference (EMI): A large number of devices such as frequency converters and motors are present at industrial sites, and the electromagnetic radiation they generate can interfere with sensor signal transmission
• Line attenuation: During long-distance transmission, cable resistance and distributed capacitance can cause signal attenuation, especially for 4-20mA signals when the distance exceeds 500 meters
• Grounding issues: Incorrect grounding methods can cause ground loop interference, resulting in drift of the signal reference potential
• Power supply fluctuation: Unstable supply voltage will directly affect the working status of the transmitter, especially two-wire instruments are more sensitive to power quality
• Environmental factors: Sharp temperature changes and mechanical vibration can affect the stability of the internal circuits of the sensor

In response to these issues, the TS-TS204 pressure transmitter developed by Xi'an Shenghongchuang Instrument Co., Ltd. adopts a multiple protection design. Through its built-in signal conditioning circuit, electromagnetic shielding housing, and optimized power supply design, this product effectively solves the pain points of traditional diffused silicon sensors in remote transmission applications.

Core Technical Advantages of the TS-TS204 Pressure Transmitter

As professional equipment specifically designed to solve signal transmission problems, the TS-TS204 series pressure transmitters integrate multiple innovative technologies:

1. Enhanced signal transmission system

It adopts the industrial-grade HART communication protocol, supporting synchronous transmission of 4-20mA analog signals and digital signals. The digital signal uses a differential transmission method, improving anti-interference capability by more than 60% compared with traditional single-ended transmission. The built-in signal amplifier compensates for line attenuation, ensuring that signal attenuation does not exceed 0.1% within a transmission distance of 1000 meters.

2. Multiple electromagnetic protection design

The sensor housing is integrally cast from 316L stainless steel, achieving electromagnetic shielding performance up to 60dB. The internal circuits adopt a multilayer PCB design, and all key signal paths use shielded twisted pairs. Certified to the IEC61000-4-3 standard, it can resist radiated RF electromagnetic field interference of 10V/m.

3. Intelligent power management system

The operating voltage range is 14.5-45VDC, with a built-in voltage regulator and filter circuit, and the power supply rejection ratio (PSRR) reaches 80dB. When transient power fluctuations occur, the energy storage capacitor can provide continuous power supply for at least 100ms, avoiding signal interruption.

In practical applications, the TS-TS204 series can be used together with domestic capacitive pressure transmitter ZDY9351 digital display transmitter intelligent differential pressure transmitter to build a complete pressure monitoring system. Both comply with IEC standards and have extensive application cases in industries such as electric power and petrochemicals.

Maintenance and Calibration Key Points for Diffused Silicon Pressure Sensors

To ensure the long-term stable operation of the sensor, correct maintenance is of vital importance:

For models such as TS-TS203 that require regular calibration, it is recommended to use a standard pressure source with accuracy better than 0.05%. During calibration, attention should be paid to controlling the ambient temperature within 23±5℃ and relative humidity within the range of 45-75%. Calibration data should be recorded and archived to establish equipment health records.

Application Solutions of Pressure Transmitters in Typical Industries

Different industries have differentiated requirements for pressure measurement, and several typical application scenarios are introduced below:

1. Petrochemical industry

In refining units, the LPB-LPB8400 series sensors are used for reactor pressure monitoring. Its Hastelloy diaphragm can withstand hydrogen sulfide corrosion, and fluororubber seals adapt to high-temperature and high-pressure environments. The system integrates ExdⅡCT6 explosion-proof certification, meeting the requirements for use in hazardous areas.

2. Power industry

Power plant boiler systems use the 7MF-MF1564 transmitter to monitor steam pressure. This model has a range of up to 10MPa and an operating temperature range of -40～150℃, with built-in temperature compensation to ensure measurement accuracy. It communicates with the DCS system via the HART protocol to achieve remote monitoring.

3. Metallurgical industry

Blast furnace systems use the PTB-PTB505 series to measure gas pressure. The specially designed heat dissipation structure can withstand radiant high temperatures of 800℃, and the ceramic diaphragm avoids metal fatigue. Equipped with a self-diagnostic function, it can provide early warning of sensor abnormalities.

Key Factors in Selecting Pressure Transmitters

Facing the many models on the market, users should select according to actual needs:

1. Characteristics of the measured medium: Corrosive media require special materials (such as Hastelloy, Monel, etc.)
2. Environmental conditions: Harsh environments such as high temperature and vibration require models with corresponding protection ratings
3. Accuracy requirements: Process control generally requires an accuracy of 0.5%FS or above, while metering-grade applications require 0.1%FS
4. Communication requirements: Modern factories should give priority to intelligent transmitters supporting digital protocols such as HART and PROFIBUS
5. Certification requirements: Hazardous areas must use products certified by ATEX, IECEx, etc.

Xi'an Shenghongchuang Instrument Co., Ltd. provides a full range of products from the PT-B basic type to the 7MF-MF1567 customized type, meeting the needs of different scenarios. In particular, the TS-TS204 series performs outstandingly in remote transmission signal stability and has been successfully applied in multiple national key projects.

Summary and Recommendations

The signal transmission problems of diffused silicon pressure sensors can be solved through technological innovation and standardized maintenance. With its enhanced signal transmission system, multiple electromagnetic protection, and intelligent power management technologies, the TS-TS204 pressure transmitter provides users with a reliable solution. During selection and use, it is recommended to:

• Select appropriate sensor models and materials according to actual working conditions
• Strictly carry out installation and maintenance in accordance with specifications
• Establish a regular calibration and inspection system
• Give priority to brand products with comprehensive technical support

If you would like to learn more technical details about diffused silicon pressure sensors or obtain professional selection advice, please contact the technical team of Xi'an Shenghongchuang Instrument Co., Ltd. We provide full-process services from product selection, installation and commissioning to maintenance, offering reliable pressure measurement solutions for your industrial automation system.