When purchasing the DQ-805 pressure transmitter，price is an important consideration. This article provides an in-depth analysis of the reasons for quotation differences among diffused silicon sensors，compares the cost performance of models such as HM20G-1-A1-F1-W2，M-M5176，and HT-PD，and helps you find the best procurement channels for genuine DG1300-BZ series and PT124B-210 high-quality pressure transmitters.

1. Market Status and Quotation Influencing Factors of Diffused Silicon Pressure Transmitters

In the current industrial sensor market，diffused silicon pressure transmitters hold a significant share thanks to their stability and accuracy. Prices of products represented by the DQ-805 and DG1300-BZ series can vary by 30%-50%，mainly due to the following factors：

2. Comparative Analysis of Core Technical Parameters

Comparison based on measured data shows that the DG1300-BZ-C-2-0.6 achieves a linearity of ±0.1%FS in the 0.6MPa range，outperforming similar products. However，the M-M5176 shows a temperature drift of 0.05% during gas pressure measurement，so it is recommended to choose the DQ-805 model with temperature compensation for high-temperature operating conditions.

2.1 Key Performance Indicators

Accuracy class：the genuine DG1300-BZ series can reach class 0.075，while mixed products on the market are usually only class 0.2. If you need to measure both tension and compression force，you may consider the Chinese-made weighing sensor XYL-1 tension-compression S-type stainless steel weighing sensor，with a comprehensive accuracy of 0.02～0.03.

3. Procurement Channel Identification Guide

The survey shows that the quotation for DG1300-BZ-B-2-1.6 from authorized distributors is 8-12% higher than that from unofficial channels，but complete ISO9001 quality traceability documents are provided. It is recommended to verify genuine products in the following ways：

• Check the laser anti-counterfeiting code at the pressure port
• Request a third-party test report（such as the 60MPa burst test data of PT124B-210）
• Compare the officially published dimensional parameters（for example，the standard flange size of DG1300-BZ-A-2- should be φ58mm）

4. FAQ on Operation and Maintenance

Q：Does the HT-PD sensor fluctuate during liquid measurement？
A：This is usually caused by air pockets at the installation position. It is recommended to install an exhaust valve at the high point of the pipeline，or switch to a DQ-805 model with damping adjustment.

Q：How to determine whether a diffused silicon sensor needs to be replaced？
A：When the zero drift exceeds 0.5% of the range or the insulation resistance is ＜100MΩ（a typical failure seen after 3 years of use of the M-M5176），it should be replaced in time.

5. Recommended Industry Solutions

For dynamic weighing scenarios such as crane scales，it is recommended to use the Chinese-made weighing sensor XYL-1 together. Its S-type structure can withstand both tension and compression force，and its operating temperature range of -20℃～+65℃ meets the requirements of most industrial environments. This product has passed a 150% safe overload test and can form a complete measurement system with the AST-K000 pressure transmitter.