Core Performance Testing and Selection Guide for Diffused Silicon Pressure Transmitters

In industrial automation control, the performance of the SMP-SMP132 pressure transmitter directly affects system stability. Through 3 sets of measured data, this article provides an in-depth analysis of the key points for selecting diffused silicon liquid and gas pressure sensors, helping technical evaluators understand the core differences among product series such as B-B0501 and SMP-SMP135, and providing professional reference for flow control equipment selection.

1. Accuracy and Stability: Comparative Analysis of Measured Data

The accuracy of diffused silicon pressure transmitters is the primary factor in model selection. We conducted a 3-month stability test on mainstream models such as SMP-SMP132 and B-B0501:

• Zero drift test:The maximum drift of SMP-SMP132 under the environment of -20℃~80℃ is ±0.05%FS/℃
• Long-term stability:After 2000 hours of continuous operation, the accuracy degradation of SMP-SMP135 is only 0.1 class
• Media compatibility:The JPE-JPE series improves tolerance to corrosive gases by 40%

Test data show that HPB-HPB300, which uses a monocrystalline silicon sensing element, performs particularly well in high-temperature environments, and its temperature drift coefficient is 30% lower than that of traditional diffused silicon sensors.

2. Key Indicators of Structural Design and Environmental Adaptability

The installation environment of flow control equipment often presents challenges such as vibration and humidity, and we focused on evaluating the following structural parameters:

It is particularly worth noting that model 40-1012 adopts a split structure design. Its characteristic of separating the sensor from the electronic components for installation extends its service life by 2-3 times in strong vibration scenarios.

3. Measured Signal Output and System Compatibility

Modern industrial control systems have increasingly stringent requirements for signal output, and we tested multiple output methods for different application scenarios:

1. Analog output:The 4-20mA output of PB-PB8400 still maintains 0.2% accuracy over a transmission distance of 300 meters
2. Digital output:YS-2 supports the RS485 Modbus protocol, with a measured response time of ≤10ms
3. Wireless transmission:SMP-SMP131 can be equipped with an optional LoRaWAN module, with a transmission distance of up to 2km in open environments

For DCS systems requiring HART protocol communication, it is recommended to choose the JPE-JPE series with digital output, whose protocol compatibility has passed Profibus PA certification.

4. Economic Evaluation and Procurement Recommendations

On the premise of meeting technical indicators, procurement cost is an important basis for decision-making. Through quotation data from 10 suppliers, it was found that:

• For bulk purchases （≥50 units）, the unit price of SMP-SMP135 can be 18% lower than the retail price
• The PB-PB8400 series, with a high localization rate, has a spare parts supply cycle 15 days shorter than imported brands
• The special sealing design of model 40-1012 reduces its maintenance cost by 30%

It is recommended that technical evaluators strike a balance between economical models such as PY-PY212 and high-performance models such as HPB-HPB300 based on project budget and application scenarios.

5. Analysis of Industry Application Cases

In the gas flow control system of a large petrochemical project, the measured performance of SMP-SMP132 is as follows:

• Operated continuously for 6000 hours without failure in an 85℃ high-temperature steam environment
• Compared with B-B0501, its zero-point stability improved by 25%
• Passed SIL2 safety certification, meeting the requirements for use in hazardous areas

This case proves that selecting dedicated models for specific working conditions （such as the explosion-proof YS-2） can significantly improve system reliability.

Professional Selection Recommendations and Technical Service Support

As a high-tech enterprise with 15 years of industry experience, Xi'an Shenghongchuang Instrumentation Co., Ltd. recommends that technical evaluators focus on:

• The matching degree between media characteristics （corrosiveness, viscosity, etc.） and sensor materials
• Special system requirements for response time and signal type
• The impact of ambient temperature variation range on accuracy

Our engineering team can provide free technical consultation and selection calculation services to help you match the most suitable pressure transmitter solution for your flow control projects. Contact our technical consultants now to obtain detailed parameters and quotation plans for product series such as SMP-SMP132 and JPE-JPE.