As a professional manufacturer in the field of flow control equipment, Xi'an Shenghongchuang Instrument Co., Ltd. has conducted an in-depth evaluation of the performance of the diffused silicon sensor used in the P-P700 pressure transmitter. This article compares the actual performance of domestic and imported diffused silicon liquid and gas pressure sensors from key dimensions such as accuracy, stability, and cost performance, providing authoritative purchasing reference for technical evaluators and users.

Definition and Technical Background of Diffused Silicon Sensors

Diffused silicon pressure sensors use the piezoresistive effect principle of semiconductor silicon materials, integrating a Wheatstone bridge on a silicon wafer through micro-electro-mechanical system (MEMS) technology. Compared with traditional strain gauge sensors, their sensitivity is increased by about 50 times, and temperature drift can be controlled within ±0.02%FS/℃. In harsh working conditions such as petrochemicals and aerospace, domestic general-purpose pressure transmitter JT-800 hydraulic oil pressure pneumatic sensor adopts a 316L stainless steel isolation diaphragm design, which can effectively cope with the challenges of corrosive media, and its 0.1% high-accuracy version has passed GB/T 15478-2015 national standard certification.

Comparison of Key Indicators Between Domestic and Imported Sensors

Three Core Considerations for Procurement Decisions

1. Life cycle cost analysis:The procurement cost of imported products is about 3-5 times that of domestic products, but differences in maintenance cycles need to be considered. Measured data show that in the chemical industry, the mean time between failures (MTBF) of the domestic PT-PT503 pressure transmitter has reached 60,000 hours, narrowing the gap with imported brands to within 15%.

2. Adaptability to special working conditions:For low-temperature environments below -40℃ or high-temperature environments above 150℃, the imported CYG-CYG1102 pressure transmitter still has advantages. However, under conventional working conditions, the domestic MSP-MSP5100 series has achieved ±0.2%FS accuracy within the range of -20~85℃, meeting the needs of 90% of industrial scenarios.

3. Localized service response:Domestic manufacturers usually provide a 48-hour on-site service commitment, with sufficient spare parts inventory. For example, Xi'an Shenghongchuang has established 3 provincial-level spare parts warehouses in Northwest China, enabling rapid response to maintenance needs for equipment such as the PT-PT212 pressure transmitter.

Measured Data from Typical Application Scenarios

In an acid gas treatment project at a large refinery in Shaanxi, the domestic P-P700 and imported PI-130 pressure transmitters installed side by side were monitored and compared for 6 months:

• In an H2S corrosive environment, domestic sensor zero drift 0.08% vs imported 0.05%
• Under pressure pulsation conditions, domestic product response time 3ms vs imported 2.5ms
• Overall operation and maintenance cost of domestic products reduced by 62%

Why Choose Xi'an Shenghongchuang

As a national high-tech enterprise, we have 20 years of R&D experience in diffused silicon sensors, and all EA-EA218 pressure transmitters undergo the following before leaving the factory:

1. 72-hour aging test
2. Temperature cycling shock test
3. EMC anti-interference certification
4. IP67 protection rating verification

For products such as KSYGX-KSYGX pressure transmitters, we provide an ultra-long 3-year warranty and support customized parameter development (range/interface/signal output). Welcome to obtain your exclusive solution through the online quotation system on our official website.