Is selecting a PH-PH101 pressure transmitter troubling many users? The performance differences of diffused silicon sensors in liquid/gas measurement directly affect equipment operating efficiency. This article analyzes the key selection points of models such as DG1300 and XMLK-C21 through a comparison of 3 major application scenarios, helping operators quickly master the purchasing skills for diffused silicon pressure sensors.

I. Core Working Principle and Technical Advantages of Diffused Silicon Pressure Sensors

Diffused silicon pressure sensors use the piezoresistive effect of semiconductor silicon materials, forming a Wheatstone bridge on the silicon diaphragm through precision photolithography technology. When the pressure of the measured medium acts on the sensing element, the silicon diaphragm deforms, causing a change in resistance value, which is converted into a standard electrical signal output through the signal conditioning circuit. Its core advantages are reflected in:

• High-precision measurement: Taking the DG1300 series as an example, its non-linearity can reach ±0.1%FS, and the repeatability error is ≤0.05%, making it particularly suitable for process control scenarios with stringent requirements
• Media compatibility: The XMLK-C21 model adopts a 316L stainless steel isolation diaphragm design, capable of withstanding highly corrosive liquids and high-temperature gaseous media
• Temperature stability: The PT124B-210-1/4NPT transmitter has a built-in temperature compensation algorithm, maintaining an accuracy drift of ±0.2% within the range of -40℃~125℃

1.1 Performance Comparison with Strain Gauge Sensors

II. Key Selection Indicators for Liquid Measurement Scenarios

In liquid pressure monitoring such as chemical processes and water treatment, the selection of the PH-PH101 pressure transmitter should focus on the following parameters:

2.1 Matching Medium Characteristics

For corrosive liquids, the GT-V pressure transmitter is equipped with a Hastelloy C276 diaphragm, which can resist strongly corrosive media such as hydrochloric acid and hydrofluoric acid. In the food and pharmaceutical industries, the PMI009-732-350GB model has passed 3-A sanitary certification, meeting sterile environment requirements.

2.2 Pressure Range Selection

1. Low-pressure measurement（0-1MPa）: It is recommended to choose the DG1300-BZ-B-2-0.2-CJ-AA model, with a minimum range down to 20kPa
2. Medium-pressure range（1-10MPa）: The XMLK-C21 transmitter adopts a dual-chamber structure, with an overload capacity of up to 200%
3. High-pressure applications（above 10MPa）: The PT124B series is equipped with a reinforced sealing structure, with a maximum pressure resistance of 60MPa

III. Three Special Considerations for Gas Pressure Measurement

Different from liquid media, gas pressure measurement requires additional attention to the following factors:

3.1 Micro-pressure Measurement Solution

The AT-131 pressure transmitter adopts a unique differential pressure design, with a resolution of up to 1Pa, suitable for low-pressure scenarios such as ventilation systems and cleanrooms. Its zero-point temperature coefficient is only 0.01%FS/℃, significantly better than the industry standard.

3.2 Explosion-proof Certification Requirements

In hazardous locations such as petroleum and natural gas, the SMP131-TLD-L356GS-D1-F-53-4M01 model is simultaneously certified by ATEX and IECEx, complies with the use standard for Zone 0 areas, and has a protection rating of IP67.

3.3 Pulsating Airflow Handling

For pulsating air sources such as compressors and turbines, the GT-V pressure transmitter has a built-in damping adjustment function, allowing the response time to be set to 0-32ms via a knob, effectively eliminating the impact of pressure spikes on measurement.

IV. Comparative Analysis of Typical Application Scenarios

V. Common Selection Misunderstandings and Recommendations for Purchasing Genuine Products

Regarding the question of "where to buy genuine diffused silicon liquid and gas pressure sensors," Xi'an Shenghongchuang Instrumentation Co., Ltd. reminds users to pay attention to:

• Beware of exaggerated specifications: Some sellers claim that the PMI009-732-350GB pressure transmitter has an accuracy of ±0.05%, but in fact they do not provide a CNAS-certified report
• Verify production qualifications: Regular manufacturers such as Shenghongchuang possess ISO9001:2015 and explosion-proof product manufacturing licenses
• Verify after-sales service: Genuine products provide an 18-month warranty and support on-site calibration services

Summary and Technical Service Support

Correct pressure transmitter selection requires comprehensive consideration of medium characteristics, environmental conditions, and measurement requirements. As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrumentation Co., Ltd. provides technical consultation, selection support, and customized services for the full range of diffused silicon sensors from DG1300 to GT-V. Contact our engineering team now to obtain a selection solution and technical white paper tailored to your specific application.