As a key device for industrial measurement，the HM20G-1-A1-F1-W2 pressure transmitter directly affects measurement accuracy and stability through the selection of its core component，the diffused silicon sensor。Focusing on mainstream models such as DG1300 and PT124B，this article analyzes how operators can select the most suitable diffused silicon pressure sensor for liquid/gas measurement from aspects such as media compatibility，measuring range，and cost performance。

Technical Principles and Market Status of Diffused Silicon Sensors

Diffused silicon pressure sensors convert pressure signals through the semiconductor piezoresistive effect，with the core principle being the diffusion formation of a Wheatstone bridge on a silicon diaphragm。Currently，products such as HM20G-1-A1-F1-W2 and the DG1300-BZ series on the market all adopt this technology，but different brands show significant differences in silicon wafer purity（usually required to be ≥99.999%），packaging process（laser welding/adhesive bonding）and temperature compensation algorithms（0.01%FS/℃ level）。According to the 2023 China Sensor Industry Development Blue Book，the market size of industrial-grade diffused silicon sensors has reached 4.76 billion yuan，of which liquid/gas measurement accounts for more than 60%，but users’ dependence on imported models such as AST-K000 remains as high as 45%。

Performance Comparison Analysis of Mainstream Models

Key Selection Indicators and Operating Recommendations

When selecting models such as DQ-805，operators should focus on：1) Media compatibility——316L stainless steel isolation diaphragms should be selected for strong acid environments；2) Overload capacity——it is recommended to select a safety factor of 150% of the upper range limit；3) Long-term stability——check certification data according to the EN 837-1 standard。For example，in clean pipeline monitoring in the pharmaceutical industry，DG1300-BZ-C-2-0.6 has become the preferred choice due to its drift characteristic of ≤0.01%FS/year。It is worth noting that，Domestic weighing sensor NS-TH3A spoke-type force sensor round sensor with square base pressure sensor also demonstrates a combined accuracy of ±0.02% within the 5kg～20t range，making it especially suitable for complex operating conditions requiring simultaneous measurement of pressure and tensile force。

FAQ on Common Procurement Misconceptions

Q：Does the low price of the HT-PD model mean insufficient performance？
A：Price differences mainly come from packaging materials（such as aluminum housing vs titanium alloy）and calibration frequency（factory calibration/multi-point temperature compensation），but caution is needed against some merchants dumping counterfeit models such as M-M5176 at low prices。

Q：How can we verify whether the DG1300-BZ-A-2 series is an original genuine product？
A：It can be confirmed through three factors：1) Laser anti-counterfeiting code on the housing；2) Attached CNAS calibration certificate；3) 24-hour response service provided through official channels。

Industry Solutions and Trend Outlook

In the oil and gas sector，PT124B-210-60MPa-NPT1/4 has successfully replaced traditional capacitive sensors with its IP68 protection rating and wide-temperature operating capability of -40℃~125℃。In the next three years，with the popularization of IoT technology，smart transmitters with built-in LoRa wireless transmission functions（such as the upgraded DG1300-BZ-B-2）are expected to occupy 30% market share。For users with limited budgets but seeking stability，the modularly designed AST-K000 series can be considered，as it supports on-site replacement of the sensing unit without scrapping the entire device。

Professional Technical Support Services

We provide free model selection consultation and 72-hour delivery guarantee，and all models such as HM20G-1-A1-F1-W2 come with an extended 18-month warranty。Click to obtain the latest technical white paper for Domestic weighing sensor NS-TH3A spoke-type force sensor round sensor with square base pressure sensor，and learn how to optimize process workflows through 0.02～0.03 combined accuracy。