Performance Challenges of Pressure Transmitters Under High-Temperature Operating Conditions

In industrial fields such as petrochemicals and power energy, flow control equipment often needs to operate continuously in high-temperature environments above 150℃. Traditional pressure transmitters such as AC-P2-2 or NOS-Y202 models often face typical problems such as sensor drift and sealing material aging. The JSRY-316T pressure transmitter tested this time adopts Xi'an Shenghongchuang's patented ceramic piezoresistive sensing technology, and its core components are certified to IEC 60751 Class A, theoretically withstanding an operating temperature range of -40℃~200℃.

Test Environment and Standard Reference System

The experiment strictly followed GB/T 17614-2015 performance evaluation methods for transmitters used in industrial process control systems, and a test platform including the following elements was established:

• Temperature control: constant temperature chamber with PID regulation （accuracy ±0.5℃）
• Pressure standard: FLUKE 729 automatic pressure calibrator （0.025 class）
• Data acquisition: NI CompactDAQ system, sampling rate 10Hz

The comparison group selected the mainstream MH1100 and AZ-402 pressure transmitters on the market, and all tested devices underwent initial calibration by a third-party metrology institution.

Quantitative Analysis of Key Performance Indicators

Temperature Drift Characteristics

After continuous operation for 500 hours at a steady-state temperature of 180℃, the zero-point drift of JSRY-316T was 0.08%FS, significantly better than the 0.15%FS of the OPEC201 model. Through segmented temperature testing （with each 20℃ as one interval）, it was found that its temperature coefficient curve showed excellent linearity, and compared with the BS-602 pressure transmitter, the nonlinear error was reduced by 42%.

Long-Term Stability Performance

The data shows that the attenuation rate of JSRY series pressure transmitters is relatively slow, thanks to its unique temperature compensation algorithm and military-grade 316L stainless steel isolation diaphragm design.

Industrial Application Scenario Verification

In a geothermal power generation project in Shaanxi, 12 JSRY-316T units were deployed at key monitoring points on the main steam pipeline. Field data records show:

• Continuous operation for 6 months without failure in a 190℃ saturated steam environment
• Modbus RTU communication with the DCS system maintained 99.7% transmission stability
• The maintenance cycle was extended by 3 times compared with the originally used NOS-Y202 model

In-Depth Analysis of Technical Advantages

Materials Science and Structural Innovation

The pressure sensing unit of JSRY-316T uses an alumina ceramic substrate, whose thermal expansion coefficient is highly matched with the silicon piezoresistive chip. Compared with the epoxy resin potting process of the traditional AC-P2-2 pressure transmitter, this rigid connection structure effectively eliminates microstrain caused by thermal stress.

Intelligent Temperature Compensation Technology

The built-in PT1000 temperature sensor monitors the chip temperature in real time with a resolution of 0.1℃, and a 32-bit ARM processor executes a third-order polynomial compensation algorithm. Test data shows that this technology enables full-temperature-range comprehensive accuracy to reach 0.2%FS, an improvement of 60% over the MH1100 pressure transmitter.

Industry Application Recommendations and Summary

This test verified the excellent stability of the JSRY-316T pressure transmitter in harsh high-temperature environments, making it particularly suitable for the following scenarios:

1. Pressure monitoring in catalytic cracking units in the petrochemical industry
2. Steam drum pressure control of power boilers
3. Process flow measurement in high-temperature melt pipelines

As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation Co., Ltd. has obtained SIL2 functional safety certification and ATEX explosion-proof certification for its JSRY series products. If you need complete test data or customized solutions, please contact our engineering technical team immediately.

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