Technical Challenges and Solutions for High-Temperature Liquid Level Measurement

In chemical production processes, high-temperature liquid level measurement has always been a technical challenge. Equipment such as chemical reaction kettles and storage tanks often operates under extreme conditions above 300℃, and traditional liquid level sensors are prone to measurement errors due to material thermal expansion, seal failure, or signal drift. The KYB1903M1IC1-1 high-temperature pressure-guided level transmitter developed by Xi'an Shenghongchuang Instrumentation Co., Ltd. adopts an integrated stainless steel cable cylinder structure, and isolates the high-temperature medium through a pressure-guiding diaphragm, achieving ±0.1%FS measurement accuracy in environments from -20℃ to +400℃.

Analysis of Core Technological Innovations

The breakthrough design of this product is reflected in three aspects: first, the combination of a 316L stainless steel housing and a Hastelloy diaphragm can withstand corrosive media with a pH value of 2-12; second, the built-in temperature compensation module can automatically correct zero drift caused by changes in ambient temperature; finally, the cable-type installation structure supports vertical or horizontal multi-position deployment. Compared with similar products such as the SP-814 or HDP601H models, its response time is shortened to 50ms, making it particularly suitable for monitoring dynamic processes such as polymerization reactions.

Practical Application in a Large Chemical Plant

Project Background and Operating Condition Parameters

In the ethylene storage tank retrofit project of a chlor-alkali chemical plant in Shaanxi in 2023, it was necessary to monitor the liquid level of sulfuric acid with an 85% concentration. The medium temperature was maintained at 280℃±15℃ for a long time, and there were periodic pressure fluctuations. The originally used YM-GLYW series sensors experienced sealing ring aging issues on average every 3 months, resulting in an annual increase of 120,000 yuan in maintenance costs. After the technical evaluation team compared 5 products including the MPM4809TD3E24, KYB1903M1IC1-1 was ultimately selected for the upgrade.

Implementation Process and Performance Verification

Flange mounting was used during installation, and it was connected to the DCS system through the 4-20mA+HART protocol. Continuous operation data over 6 months showed that under fluctuating pressure conditions of 0.6-1.2MPa, the standard deviation of the liquid level signal remained within 0.05%, fully meeting the monitoring requirements of the API 2350 standard for hazardous chemical storage. It is worth mentioning that its alloy steel material and the pressure-bearing structure used in the domestic weighing sensor TH4805 platform force sensor/platform sensor are similar, both reflecting the reliability advantages of integrated design.

Industry Comparison and Selection Recommendations

For different application scenarios, technical evaluators need to focus on the comparison of the following parameters:

Maintenance Optimization and Cost Analysis

According to life cycle cost model calculations, the 5-year total cost of KYB1903M1IC1-1 is 34% lower than that of conventional products, mainly due to: 1) a maintenance cycle requiring calibration only every 12 months; 2) the IP68 protection rating reduces unexpected downtime; 3) the modular design supports rapid on-site replacement of components. This echoes the product advantages of the TH4805 sensor, namely "high accuracy and good long-term stability."

Summary and Action Recommendations

This case demonstrates the excellent adaptability of the KYB1903M1IC1-1 high-temperature pressure-guided level transmitter in the chemical industry, with technical indicators far exceeding traditional models such as YM-CYYW. As a national high-tech enterprise, Xi'an Shenghongchuang has all its products certified under the ISO9001:2015 quality management system and can provide users with customized solutions. If you need to obtain the detailed technical white paper for this product or apply for an on-site test, please contact our engineering service team immediately.