Key Factors Affecting the Measurement Range of Diffused Silicon Pressure Transmitters

In industrial fluid control systems, the measurement range of the PD-PD50 pressure transmitter is a core parameter in diffused silicon sensor selection. This article, written by the expert team of Xi'an Shenghongchuang Instrumentation Co., Ltd., provides an in-depth analysis of range selection techniques for diffused silicon liquid and gas pressure sensors, while also covering a comparison of key parameters of products in the same series such as S-10 and PM-PM320, helping operators accurately match application requirements.

The measurement range of a diffused silicon sensor directly determines the suitability of the device in scenarios such as petrochemical and electric power industries. Taking PD-PD50 as an example, its typical range covers 0-100MPa, but actual selection requires consideration of three major factors: medium characteristics, temperature compensation, and overload protection. Especially in corrosive media environments, it is recommended to give priority to products with an IP68 protection rating such as Domestic Anti-corrosion Submersible Level Sensor PTS602 Anti-corrosion Liquid Level Transmitter Sensor.

I. Principles for Matching Medium Characteristics and Range

Different media have a significant impact on sensor range selection:

• Gas media: Compression ratio and pulsating pressure need to be considered, and it is recommended to select the YSJ-B1 series with an upper range limit of 1.5 times the maximum working pressure
• High-viscosity liquids: A 20% safety margin should be added, and the damping adjustment function of the PM-PM320 model can effectively suppress pressure fluctuations
• Corrosive fluids: An isolation diaphragm structure must be used, and the PTS602 sensor uses a 316L stainless steel diaphragm that can withstand media with a pH value of 2-12

According to the GB/T 17614.3-2015 standard, attention should also be paid to the minimum measurable pressure of the sensor when selecting the measurement range. For example, the CX-203 model can still maintain 0.1 class accuracy in the 0-10kPa range segment, making it particularly suitable for micro-pressure measurement scenarios.

II. Practical Application of Temperature Compensation Technology

The temperature characteristics of diffused silicon sensors directly affect measurement accuracy:

In practical applications, when the ambient temperature exceeds 80℃, it is recommended to use the heat dissipation flange assembly matched with VP-VP431. For scenarios requiring HART protocol communication, the temperature compensation algorithm built into the PT-A pressure transmitter can improve accuracy to 0.075 class.

III. Overload Protection and Range Safety Factor

The burst pressure value of the pressure transmitter should be used as an important basis for selection:

1. Conventional operating conditions: The upper range limit should be 1.3 times the maximum working pressure (for example, ZP-801 accessories can provide additional protection)
2. Pulsating pressure scenarios: The YXP-YXP5000 series with a range 2 times the peak pressure value should be selected
3. Water hammer effect environments: It is recommended to configure the dedicated buffer valve assembly for the S-10 model

In cleanrooms in the pharmaceutical industry, the PM-PM320 pressure transmitter equipped with a 316L stainless steel clamp connection can not only meet 3D hygiene standards, but also withstand 150% overload pressure.

Horizontal Comparison of Key Parameters of Products in the Same Series

Through comparative analysis, the differentiated advantages of different models can be identified:

It is particularly worth noting that in applications requiring explosion-proof certification, priority should be given to models with ExiaⅡCT4-7 certification, such as the PTS602 anti-corrosion sensor. Its ceramic capacitive pressure-sensitive element can still operate stably in flammable and explosive environments.

Practical Tips for Operation and Maintenance

Key operating points for extending the service life of diffused silicon sensors:

• Regular calibration: Use the ZP-801 calibration kit provided by the original manufacturer to perform zero-point calibration every 6 months
• Wiring specifications: As shown in the PM-PM320 wiring diagram, the shielded wire must be grounded at a single end to eliminate interference
• Media compatibility: For corrosive media, the PTFE isolation diaphragm structure of PTS602 should be selected
• Fault diagnosis: The YSJ-B1 series can read real-time temperature compensation data through a HART handheld communicator

When abnormal fluctuations occur in the measured value, you can refer to the fault tree in the VP-VP451 user manual for step-by-step troubleshooting. For scenarios involving long-term immersion in liquid, it is recommended to replace the sealing O-ring every 2 years.

Summary and Selection Recommendations

When selecting a diffused silicon pressure transmitter, it is necessary to comprehensively consider three dimensions: measurement range, medium characteristics, and environmental conditions. Through the analysis of the technical parameters of PD-PD50 and the comparison with products in the same series in this article, the following conclusions can be drawn:

1. For conventional industrial pressure measurement, priority should be given to the PD-PD50 series with 0.1 class accuracy
2. For corrosive environments, anti-corrosion models such as PTS602 with IP68 protection must be selected
3. For precision control scenarios, it is recommended to use the VP-VP451 transmitter with HART protocol

As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation has all its pressure transmitters certified under the ISO9001 quality management system. If you need the complete technical specification for PD-PD50 or a selection solution for Domestic Anti-corrosion Submersible Level Sensor PTS602 Anti-corrosion Liquid Level Transmitter Sensor, please feel free to contact our technical engineering team.

Call 400-xxx-xxxx now or visit the official website for online consultation to obtain an exclusive solution for your operating conditions. We provide 24-hour professional technical support to ensure that you choose the right model and use the right method.