In the field of industrial automation, the performance evaluation of PT304 pressure transmitters is of vital importance. This article conducts a professional comparative test of 5 core indicators, including accuracy, stability, and response speed, for mainstream models such as PT303, PT304, and PT101, providing authoritative data reference for technical evaluators. As a professional sensor manufacturer, Xi'an Shenghongchuang Instrumentation Co., Ltd. will analyze the key differences among different models of pressure transmitters for you.

I. Accuracy Comparison: Error Range and Long-Term Stability

Accuracy is the primary indicator for evaluating pressure transmitter performance. We conducted a continuous 30-day test on models such as PT304, PT303, and PT101, and the results show:

• PT304 pressure transmitter: Within the 0-10MPa range, the overall accuracy reaches ±0.1%FS （full scale）, exceeding the requirements of the industry standard GB/T 17614.1-2015
• PT303 pressure transmitter: Accuracy is ±0.2%FS, and the error increases to ±0.25% in high-temperature environments （85℃）
• PT101 pressure transmitter: Basic accuracy is ±0.5%FS, making it more suitable for conventional applications with lower accuracy requirements

It is worth noting that the silicon piezoresistive technology used in the AST4600 pressure sensor enables PT304 to perform outstandingly in long-term stability, with annual drift less than ±0.1%.

II. Response Speed Test: Dynamic Performance Analysis

In rapidly changing industrial processes, response speed directly affects the real-time performance of the control system. The following data were obtained through a step pressure test （0→5MPa）:

The PT304 pressure transmitter adopts MEMS technology from the same source as the AST4700 pressure sensor, and its miniaturized sensing element significantly improves dynamic response capability.

III. Environmental Adaptability: Performance Under Extreme Operating Conditions

3.1 Temperature Impact Test

Within the temperature range of -40℃~125℃, the output characteristic variations of each model are as follows:

• PT304 temperature coefficient: ±0.015%/℃
• PT1211 pressure transmitter: ±0.03%/℃
• The matching model of the AST20HA pressure sensor shows the best performance, reaching ±0.01%/℃

3.2 Vibration Resistance Performance

A 10-2000Hz sweep frequency test was conducted according to the IEC 60068-2-6 standard:

Under 50g acceleration vibration, the signal fluctuation of PT304 is less than 0.05%FS, and its structural design is in line with the anti-vibration solution of the AST43LP pressure sensor.

IV. Electrical Characteristics Comparison

In view of common electrical interference at industrial sites, we focused on testing:

• Power fluctuation adaptability: PT304 maintains stable output within the 18-36VDC range
• EMC performance: Passed the IEC 61000-4-3 standard 10V/m radio-frequency field immunity test
• Insulation resistance: ＞100MΩ@500VDC （both PT304/PT102 meet the standard）

V. Long-Term Reliability Verification

Through accelerated life testing （85℃/85%RH environment for 1000 hours）:

Xi'an Shenghongchuang's AST4400 pressure sensor technology provides core reliability assurance for PT304, with a mean time between failures （MTBF） of 150,000 hours.

Summary and Selection Recommendations

Based on the comprehensive test results of 5 major indicators, the applicable scenarios of different models are as follows:

• High-precision control: Give priority to PT304 or customized solutions equipped with AST series sensors
• Conventional monitoring: PT101/PT102 offer better cost performance
• Extreme environments: The reinforced version using AST20HA pressure sensor technology is recommended

As a pressure measurement expert with 20 years of industry experience, Xi'an Shenghongchuang Instrumentation Co., Ltd. can provide complete solutions ranging from PT series transmitters to the full AST sensor series. Our engineering team is always ready to provide you with professional selection support and technical consultation.

Contact our technical consultant now: 400-XXX-XXXX, or visit our official website to obtain the complete test report and customized solutions.