In industrial automation control systems, the selection of the DT-131 pressure transmitter directly affects measurement accuracy and system stability. Based on the practical needs of operators, this article analyzes how to correctly select DT-131 and similar diffused silicon pressure transmitter models from 5 core dimensions, including medium characteristics, measuring range, and accuracy class, helping users avoid procurement misunderstandings and ensure long-term reliable operation of the equipment.

I. Compatibility Between Medium Characteristics and Sensor Materials

When selecting a DT-131 pressure transmitter, the first step is to evaluate the chemical properties of the measured medium. Corrosive liquids or gases (such as acid-base solutions and chlorine gas) require sensors made of 316 stainless steel, which offers better corrosion resistance than 304 stainless steel. For the food and pharmaceutical industries, the sanitary grade of the medium must also be considered to avoid contamination caused by sensor materials.

Because diffused silicon sensors use the semiconductor strain principle, attention must be paid to the medium temperature range (-30～+85℃). If the medium temperature exceeds the standard range, it is recommended to select Domestic Industrial 2088 Pressure Transmitter YPS-300 Industrial Explosion-proof Pressure Sensor with a high-temperature isolation diaphragm, whose temperature compensation technology can ensure measurement stability in environments from -20～85℃.

Key Parameter Matching Recommendations:

• Highly corrosive media: prioritize 316L stainless steel wetted parts
• High-temperature steam: confirm that the sensor temperature compensation range covers actual operating conditions
• Viscous liquids: select the KL-KL316 model with diaphragm cleaning function

II. Measuring Range and Overload Protection Design

The DT-131 series provides a wide measuring range selection from 0～0.01MPa to 0～250MPa. In actual operation, it is recommended to select a model whose normal working pressure falls between 30%～70% of the range. For example, when the system working pressure is 1MPa, selecting the TCT-1202 pressure transmitter with a 0～1.6MPa range can ensure both resolution and a safety margin.

For hydraulic systems where pressure peaks may occur, special attention should be paid to overload capacity parameters. High-quality diffused silicon sensors (such as the AP-AP131 model) usually have an overload tolerance of 2 times full scale or 300MPa (whichever is smaller). Combined with M20×1.5 threaded installation, this can effectively prevent mechanical damage.

III. Accuracy Class and Stability Requirements

The accuracy of industrial-grade pressure transmitters is classified into Class 1.0, Class 0.5, and Class 0.25, representing the percentage of comprehensive error relative to full scale. In the DT-131 series, the YB-YB3101 model adopts a laser calibration process, achieving annual stability of ±0.1%FS, making it suitable for applications requiring long calibration intervals (such as power station inspections).

It should be noted in particular that actual accuracy is affected by temperature. Selecting the TXY-TXY801 model with ±0.05%FS/℃ temperature drift compensation can significantly improve measurement reliability in scenarios with large temperature differences, such as metallurgy and air compressors.

Accuracy Recommendations for Different Application Scenarios:

IV. Output Signal and System Integration

According to the interface type of the control system, the DT-131 transmitter can provide multiple outputs such as 4～20mA two-wire and 0～10V three-wire. The PA-PA1000 model is specially designed with remote signal transmission functionality, with a maximum transmission distance of 3000 meters, making it suitable for distributed monitoring environmental protection projects.

For scenarios requiring alarm control, it is recommended to select models such as KL-KL316 with switching output. Its preset upper and lower alarm values can be quickly connected to the PLC system through a DIN connector.

V. Environmental Protection and Special Certifications

In humid, dusty, or flammable environments (such as coal mines and chemical plants), attention must be paid to the product's protection rating. In the DT-131 series, explosion-proof products have passed the IP65 sealing test, and their stainless steel housing can withstand environments with 95% humidity. For special industries, it is also necessary to confirm whether certifications such as ATEX and SIL are available.

Summary and Purchasing Recommendations

Correctly selecting a DT-131 pressure transmitter requires comprehensive consideration of 5 major factors: medium characteristics, range matching, accuracy requirements, signal type, and environmental conditions. The diffused silicon sensor series provided by Xi'an Shenghongchuang Instrumentation Co., Ltd. covers complete solutions from basic models to explosion-proof models, and all products support customization services to meet special operating condition requirements.

If you need technical parameters or installation instructions for specific models (such as the threaded connection specifications of YB-YB3101), please contact our engineering team for professional selection support to ensure that your pressure measurement system achieves optimal operating status.