When purchasing the AT-131 pressure transmitter, how can you identify whether a diffused silicon Hirschmann pressure sensor is genuine? As the core component of flow control equipment, inferior products may cause measurement errors or even system failures. This article will explain the key purchasing points for models such as DG1300-BZ-B-2-0.2-CJ-AA, covering material, accuracy, and brand certification, helping you avoid common pitfalls of models such as PMI009-732-350GB and ensure that you procure reliable industrial-grade sensors.

Analysis of the Core Parameters of Diffused Silicon Hirschmann Pressure Sensors

In flow control systems, the performance of the pressure transmitter directly affects process stability and data accuracy. Taking the DG1300-BZ-B-2-0.2-CJ-AA model as an example, technical evaluators should focus on the following parameters:

• Measurement accuracy: The industrial-grade standard should reach ±0.1%FS, while low-end products such as PMI009-732-350GB are often labeled only as ±0.5%FS
• Long-term stability: The annual drift of high-quality diffused silicon sensors does not exceed 0.1%, while imitations usually exceed 0.3%
• Temperature effect: The GT-V model needs to maintain a temperature coefficient of ±0.02%/℃ within the range of -20℃~80℃
• Overload capacity: High-pressure models such as PT124B-210-100MPa-M20 must provide a burst pressure test report verified at 200%FS

According to the GB/T 17614-2018 standard for transmitters used in industrial process control systems, genuine Hirschmann sensors will have the CMC metrology certification mark on the nameplate, while imitations such as MBS1900-064G6575 often lack this key marking.

Six-Step Identification Method: Recognizing Inferior Products from Details

Step 1: Housing Material Verification

Genuine CS-m series products use an integrally formed 316L stainless steel housing, while low-cost imitations mostly use 304 stainless steel splicing processes. They can be inspected in the following ways:

Step 2: Circuit Board Analysis

After disassembling the PB-CNM1 model, it can be seen that the original product uses a ceramic substrate and gold wire bonding process, while inferior products mostly use an epoxy resin substrate + aluminum wire welding, which can easily cause signal drift in humid environments.

Horizontal Performance Comparison of Mainstream Models

For technical selection needs, we tested the key indicators of five common models:

It is worth noting that the GT-V model performs exceptionally well under pulsating pressure conditions, while DG1300-BZ-B-2-0.2-CJ-AA is more suitable for corrosive media measurement.

Risk Level Assessment of Procurement Channels

According to market research data, there are significant differences in the genuine product assurance rate among different procurement channels:

• Authorized distributors: Genuine product rate 98.7%（agent qualification certificates must be verified）
• Gold suppliers on B2B platforms: Genuine product rate 82.3%（focus on verifying the product serial number）
• Offline small distributors: Genuine product rate is less than 60%（private-label products such as PMI009-732-350GB are common）

It is recommended to give priority to suppliers that provide complete factory inspection reports, metrology certificates, and 18-month warranty.

Three Key Technical Points for Installation and Commissioning

Even for high-performance products such as PT124B-210-100MPa-M20, improper installation can still lead to measurement errors:

1. Avoid installing directly on the vibration source, and use a flexible pressure guide tube for transition
2. When the medium temperature exceeds 120℃, a condensation bend pipe must be installed together
3. The electrical interface must have protection of IP65 or above, especially in outdoor applications such as MBS1900-064G6575

Summary and Procurement Recommendations

When selecting a diffused silicon Hirschmann pressure sensor, be sure to verify the material process, metrology certification, and supplier qualifications. As a leading sensor manufacturer in western China, Xi'an Shenghongchuang Instrumentation Co., Ltd. provides for all AT-131 pressure transmitters:

• Calibration certificates issued by the China National Institute of Metrology
• Certificates of origin for key components
• 24-month extended warranty service

Contact our technical consultants now to obtain customized selection solutions and exclusive quotations for models such as DG1300-BZ-B-2-0.2-CJ-AA.