JT-800 Pressure Transmitter Procurement Guide: Factors Affecting the Price of Diffused Silicon Hesmann Sensors

When selecting a JT-800 pressure transmitter, the price of a diffused silicon Hesmann sensor is affected by multiple factors. As a professional supplier of flow control equipment, Xi'an Shenghongchuang Instrumentation Co., Ltd. analyzes the key factors for you to help technical evaluators make informed decisions. Understanding the impact of sensor material, accuracy grade, and brand differences on price ensures that you purchase the product with the best cost performance ratio.

I. Core Sensor Materials and Process Costs

The core component of the diffused silicon Hesmann pressure sensor uses a single-crystal silicon chip to form strain resistors through ion implantation technology, and its material purity directly affects signal stability. At present, the silicon chip purity requirement of mainstream international suppliers reaches 99.9999%（6N grade）, and each increase of one purity grade will lead to a 15%-20% increase in cost.

• Difference in base material：the cost of a 316L stainless steel housing is 30% higher than that of 304 stainless steel, but its corrosion resistance is improved by 2 times
• Packaging process：laser welding improves sealing performance by 50% compared with traditional argon arc welding, with a corresponding price increase of 10%-15%
• Temperature compensation：sensors using digital compensation chips cost 25% more than analog compensation ones, but temperature drift can be controlled within ±0.1%FS

II. Relationship Between Accuracy Grade and Measurement Performance

According to the IEC 60770 standard, the accuracy of pressure transmitters is divided into three main grades: 0.1 grade, 0.25 grade, and 0.5 grade. In the JT-800 series, 0.1 grade products require a 72-hour aging test during factory calibration, and every 0.05% increase in accuracy means an approximately 12% increase in production cost.

In the field of oil tank displacement measurement, non-contact products such as domestic displacement sensor MTM2 magnetostrictive displacement sensor are also significantly affected in final quotation by their 0.05%FS linearity index.

III. Brand Premium and Certification Standards

Original Hesmann sensor modules are priced 40%-60% higher than similar domestic products, mainly due to the following differences:

1. Models certified with SIL2/3 functional safety require an additional 15%-20% certification cost
2. Explosion-proof products compliant with the API 670 standard require special process treatment, increasing costs by 25%
3. Versions with HART protocol communication cost 800-1200 yuan/unit more than the basic 4-20mA output version

IV. Bulk Purchasing and Customization Services

For standard models such as PT-PT604 and CYG1102, a single purchase of more than 50 units can obtain a tiered discount of 8%-12%. For special operating condition customization（such as high-temperature type and intrinsically safe type）, attention should be paid to:

• Non-standard range modification（＜10bar or ＞600bar）results in additional mold opening costs
• Changing the material of process connection parts（Hastelloy/titanium alloy）increases costs by 30%-50%
• Output signal compatibility with RS485/Modbus protocol requires firmware upgrade

V. Technical Calibration and After-Sales Service

On-site calibration services for models such as PT124B-212 include zero calibration, range calibration, and three-point correction for temperature compensation. The annual maintenance package provided by professional service providers（including 2 on-site calibrations）accounts for about 8% of the total equipment cost.

Summary and Purchasing Recommendations

Technical evaluators should comprehensively consider operating condition requirements and life-cycle costs. For conventional industrial applications, choosing a high-quality domestic sensor with 0.25 grade accuracy and HART protocol（such as the Xi'an Shenghongchuang JT-800 series）can achieve the best cost performance ratio. For special fields, it is recommended to give priority to original factory models certified by IECEx.

If you would like to learn more about pressure transmitter selection solutions or obtain technical parameters for magnetostrictive displacement sensor, please feel free to contact our engineering team for professional support.