Core Analysis of Diffused Silicon Sensor Technology

As a key component in industrial automation，the diffused silicon sensor technology of the VEGABAR14 pressure transmitter directly affects measurement accuracy and stability。This article provides an in-depth analysis of the core operating principles of models such as 18.601G-G and 30.600G-G，explains the performance indicators of PTHY-A technology through structural diagrams，and helps technical evaluators quickly understand SP-112G dimensional compatibility and HBP-800D installation essentials。

一、Illustrated Working Principle of Diffused Silicon Sensors

Diffused silicon pressure sensors operate based on the semiconductor piezoresistive effect。When external pressure acts on the sensing element，the lattice structure of the silicon crystal deforms，resulting in a change in resistance。Taking VEGABAR14 as an example，its core components include：monocrystalline silicon diaphragm（only 0.1mm thick），Wheatstone bridge，laser-trimmed resistor network，and temperature compensation module。As shown in the cross-sectional diagram of the SP-111G model，the medium pressure is transmitted through a 316L stainless steel isolation diaphragm to the silicone oil，then uniformly applied to the silicon sensing element，ultimately outputting a standard 4-20mA signal。

二、Comparative Analysis of Key Performance Parameters

The comparison shows that the PRC-905 model performs excellently in -0.1MPa vacuum measurement applications，while the PTG485 is more suitable for high-temperature operating conditions。It is worth noting that all models are certified under the ISO9001 quality management system and come with a one-year warranty service。

三、Common Installation Misunderstandings and Solutions

Technical evaluators often overlook the installation orientation of HBP-800D——when measuring gas pressure，the transmitter should be installed vertically upward to prevent condensate accumulation；while SP-112G must keep the process connection aligned with the pipeline centerline during liquid measurement。According to the recommendations of the ASME B40.8 standard，shock-absorbing brackets should be installed in vibration environments，and the cable entry must face downward to prevent water ingress。

四、Why Choose Shenghongchuang Instruments

As a national-level high-tech enterprise in Xixian New Area，we have 15 years of R&D experience in diffused silicon sensors，and all products undergo a 72-hour aging test before leaving the factory。For complex operating condition requirements such as YM-1JY，customized solutions can be provided（such as adding an explosion-proof housing or a wireless transmission module）。Click the online consultation on the official website to obtain professional technical materials such as the PTG485 datasheet and SP-111G installation video。

Extended Reading：Comparison Between Diffused Silicon and Ceramic Sensors

In corrosive medium measurement，although ceramic sensors（such as some alternative solutions）have a lower cost，their long-term stability is 30% lower than the diffused silicon technology used in PTHY-A。Tests conducted according to the EN 61298-2 standard show that after 1000 pressure cycles，the zero drift of silicon sensors is only 1/5 of that of ceramic sensors。