Engineer Field Test Report: 3 Major Technical Defects of the PT124B-210-100MPa-NPT1/4 Pressure Transmitter

As professional engineers, we identified 3 key defects during the actual use of the PT124B-210-100MPa-NPT1/4 pressure transmitter. Although this pressure sensor based on diffused silicon technology is widely used, its performance under certain operating conditions is not entirely satisfactory. This article provides a detailed analysis of its shortcomings in measurement accuracy, environmental adaptability, and long-term stability, helping technical evaluators make more informed choices.

1. Attenuation of Measurement Accuracy Under High-Temperature Operating Conditions

In a project involving continuous monitoring of refinery pipeline pressure, we found that when the ambient temperature exceeded 80℃, the output value of this transmitter model showed obvious drift. Comparative tests conducted according to the GB/T 17614-2015 standard showed:

• Under the 25℃ calibration environment, full-scale accuracy can reach ±0.25%
• When the temperature rises to 100℃, the error increases to ±0.8%
• For every 10℃ increase in temperature, the zero-point drift increases by 0.15%FS

This phenomenon results from the high temperature sensitivity of the diffused silicon sensing element it uses. In comparison, the Vegabar-GV3 pressure transmitter in the same series adopts a dual-diaphragm temperature compensation design, which can control the error within ±0.5% under the same conditions.

2. Signal Stability Defects in Vibration Environments

In installation cases in vibration-prone locations such as compressor rooms, the PT124B-210-100MPa-NPT1/4 exhibited the following problems:

The root cause lies in the lack of an effective mechanical damping structure inside the sensor. We recommend considering the DG1300-BZ series products under similar operating conditions. This model adopts patented vibration isolation technology, and signal fluctuation can be reduced by 60% under equivalent vibration conditions.

3. Zero-Point Drift After Long-Term Use

Through 3 years of tracking and monitoring in chemical enterprises, we recorded the following:

1. After 6 months of use, the average zero-point drift was 0.1%FS
2. After 18 months, the drift increased to 0.35%FS
3. After 36 months, some equipment showed out-of-tolerance conditions of 0.8%FS

This performance degradation is directly related to the silicone oil filling process and the aging of sealing components. In comparison, the P200S-GB10CG12M4S pressure transmitter using ceramic capacitive technology can keep drift stable within 0.2%FS over the same period.

Technical Evaluation Recommendations and Alternative Solutions

Based on our field test data, we recommend that technical evaluators focus on the following improvement solutions:

• High-temperature applications: Select the PT-PT300 series with temperature compensation
• Vibration environments: Use vibration-resistant models such as SY-PG1300-1.6MPa-GB
• Long-term monitoring: Give priority to products such as HG-S3 that use ceramic sensing elements

As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrument Co., Ltd. can provide customized pressure measurement solutions. Our engineering team can recommend the most suitable diffused silicon liquid and gas pressure sensor model for you according to specific operating condition parameters.

Get Professional Selection Support Now

If you need to learn more about the technical parameters of various pressure transmitter models or obtain free sample testing, please feel free to contact our technical consultants at any time. Based on your specific application scenario (such as medium characteristics, pressure range, environmental conditions, etc.), we will provide the optimal sensor selection solution to ensure the reliability and accuracy of the measurement system.