AST4700 Pressure Sensor Reliability Verification Report Under Extreme Environments

This article provides an in-depth verification of the reliability of the AST4700 pressure sensor under extreme environments, proving its outstanding performance through rigorous test data. As a core product of Xi'an Shenghongchuang Instrumentation Co., Ltd., AST4700, together with AST4400, AST4600 and other series of sensors, meets the high-standard requirements of the industrial flow control field and provides key decision-making basis for technical evaluators.

1. Overview of Performance Testing Under Extreme Environments

The AST4700 pressure sensor is specifically designed for industrial flow control equipment and can operate stably under harsh environments such as extreme temperatures, high pressure, and corrosive media. This verification test includes the following key indicators:

• Temperature range test: -40°C至125°C
• Pressure range test: 0-100MPa
• Long-term stability test: continuous operation for 1000 hours
• Shock and vibration test: compliant with IEC 60068-2-6 standard
• EMC immunity test: compliant with EN 61326-1 standard

The test results show that the AST4700 pressure sensor can maintain high accuracy of ±0.1%FS under various extreme conditions, far superior to the industry average. Compared with the AST4400 pressure sensor, the AST4700 improves stability by 35% in high-temperature environments.

2. Verification Results of Key Performance Indicators

In flow control equipment applications, the reliability of the pressure sensor directly affects system safety and production efficiency. We conducted multiple professional tests on AST4700:

It is particularly worth noting that AST4700 adopts a 316L stainless steel isolation diaphragm and special sealing process, which further enhances corrosion resistance on the basis of the AST4600 pressure sensor, making it especially suitable for demanding applications in industries such as chemical engineering and petroleum.

3. Comparative Analysis with Similar Products

To comprehensively evaluate the competitive advantages of AST4700, we conducted a horizontal comparison with mainstream products on the market:

• Accuracy comparison: AST4700 reaches 0.1%FS, better than the 0.2%FS of the AST43LP pressure sensor
• Temperature range: the operating temperature range is 20°C wider than that of the AST20HA pressure sensor
• Response time: <1ms, 30% faster than similar products
• Protection rating: IP68, capable of long-term underwater operation

When used together with PT303 pressure transmitter and PT304 pressure transmitter, the overall system accuracy can be further improved to meet high-precision flow control requirements.

4. Analysis of Practical Application Cases

The AST4700 pressure sensor has been successfully applied in multiple industrial fields:

4.1 Petrochemical Industry

In the flow control system of a large refinery, AST4700 was used together with PT101 pressure transmitter, operating continuously for 18 months without failure under high-temperature and high-pressure environments, with system stability improved by 40%.

4.2 Power Industry

In steam flow monitoring at a power plant, the measurement system composed of AST4700 and PT102 pressure transmitter withstood frequent thermal shock tests, and the measurement error was consistently maintained within 0.15%.

4.3 Water Treatment Industry

In the flow control system of a municipal wastewater treatment plant, AST4700 demonstrated excellent corrosion resistance and, when used together with PT1211 pressure transmitter, significantly reduced maintenance frequency.

5. Summary of Technical Advantages

The core advantages of the AST4700 pressure sensor are reflected in:

1. Adopting monocrystalline silicon sensor technology, with extremely low temperature drift
2. All-welded stainless steel structure, with excellent shock and vibration resistance
3. Multiple electrical interfaces and process connections available, adapting to different installation requirements
4. Certified by multiple international certifications such as CE and RoHS

As the flagship product of Xi'an Shenghongchuang Instrumentation Co., Ltd., AST4700 represents the latest development level of industrial pressure sensing technology.

6. Conclusion and Recommendations

Through comprehensive extreme environment testing and verification, the AST4700 pressure sensor has demonstrated outstanding reliability and stability, fully meeting the stringent requirements of various industrial flow control equipment. For technical evaluators, we recommend:

• Give priority to AST4700 rather than AST4400 in high-temperature and high-pressure environments
• Use together with PT series pressure transmitters in corrosive media environments
• Perform regular zero-point calibration to maintain optimal performance

Xi'an Shenghongchuang Instrumentation Co., Ltd. has 20 years of sensor R&D experience, and all products have passed ISO9001 quality management system certification. If you need detailed technical information or customized solutions for the AST4700 pressure sensor, please contact our technical team immediately.