Jiwei Level Switch: 10+ Years of Reliable LNG Level Measurement

Table of Contents

Introduction

Liquefied Natural Gas (LNG) plays a critical role as a clean energy source in modern industry. However, due to its low density, ultra-low temperature, and high volatility, liquid level measurement in LNG applications requires equipment with exceptional reliability and safety. Conventional level switches often fail under such conditions, resulting in false alarms, frequent malfunctions, or complete operational failure.

Jiwei Automations, a leading Chinese manufacturer of industrial level measurement instruments, has developed the Ring-11 Tuning Fork Level Switch, specifically engineered for challenging LNG applications. This product has successfully replaced imported brands in numerous LNG storage tank and pipeline projects, achieving over 10 years of uninterrupted operation without a single failure, earning strong recognition across the industry.

Jiwei Level Switch: 10+ Years of Reliable LNG Level Measurement — A Decade of Stable Operation – A Leading Domestic Solution: Ring-11 Tuning Fork Level Switch Successfully Applied in LNG Projects

Ten Years of Stability – A Benchmark for Domestic Innovation: Ring-11 Tuning Fork Level Switch in LNG Projects

Technical Advantages of Ring-11 Tuning Fork Level Switch

Low-Density Liquid Detection
Ring-11 operates based on the tuning fork resonance principle, enabling accurate detection of low-density liquids such as LNG (with densities as low as 0.56 g/cm³). Even in environments with vapor or foam, the device maintains consistent and reliable alarm functionality.

Low-Temperature and Corrosion-Resistant Materials
Constructed with high-strength stainless steel or special cryogenic alloys, Ring-11 ensures long-term performance in extreme temperatures down to -50°C without embrittlement or degradation.

Certified Functional Safety (SIL2/SIL3)
Compliant with IEC 61508 standards, Ring-11 is suitable for safety instrumented systems (SIS) in critical control loops, significantly reducing the risk of leakage or overflow during abnormal conditions. (Certification can be verified via official CNCA database.)

Maintenance-Free Design
The vibrating fork structure is highly resistant to interference from vapor, foam, and mechanical vibrations. This eliminates the need for frequent calibration or cleaning, minimizing manual inspections and operational costs.

Flexible Output Options
Available with SPST or DPDT relay outputs, NAMUR, transistor, and two-wire configurations, Ring-11 integrates seamlessly with PLC or DCS systems, supporting remote alarms and automated control.

Real-World LNG Project: Ring-11 Replaces Imported Brands

In a large-scale LNG storage tank project, the customer selected Jiwei Automations’ Ring-11 Tuning Fork Level Switch as a cost-effective alternative to imported products. The results were remarkable:

✔ Accurate Measurement of Low-Density LNG: Ring-11 maintained precise level detection in LNG with a density as low as 0.56 g/cm³, eliminating false alarms and missed alarms, ensuring accurate process data.

✔ 10+ Years of Maintenance-Free Operation: Installed in extreme conditions with low temperatures, vapor, foam, and vibration, Ring-11 delivered stable performance for over a decade without failure, reducing downtime risk and increasing system availability.

✔ Enhanced Process Safety: With SIL2/SIL3 certification, Ring-11 fully met the functional safety requirements for LNG safety loops, guaranteeing reliable operation in emergency scenarios and minimizing hazards.

✔ Cost Optimization: By replacing imported solutions, the customer saved significantly on procurement and long-term maintenance costs, achieving a lower total cost of ownership (TCO) throughout the project lifecycle.

✔ International Compliance: Ring-11 meets CE and EAC certifications, ensuring compliance with global engineering standards and facilitating the client’s expansion into international markets.

Customer Testimonial:
“Ring-11 has been running for over 10 years without a single failure. Its safety and reliability are comparable to imported products, making it a truly high-performance, cost-effective solution.”

Key Technical Specifications of Ring-11

Measuring Principle: Tuning Fork Resonance Frequency Shift
Applicable Medium Density: ≥ 0.56 g/cm³
Mounting Options: Top or side mounting, multiple flange standards (ANSI, JIS, DIN) customizable
Output Options: Relay, transistor, NAMUR, two-wire
Operating Temperature: -50°C to +400°C (water-cooling available for high-temperature applications)
Ingress Protection: IP66/IP67
Certifications: SIL2/SIL3 (IEC 61508), CE, EAC, CCC
Special Versions: Food-grade material, Hastelloy, 316L stainless steel with corrosion-resistant coating

Global Certifications and Compliance

In addition to SIL and CE certifications, Ring-11 has obtained EAC certification for compliance in the Eurasian Economic Union (Russia, Belarus, Kazakhstan, etc.). This ensures legal operation in regulated markets and demonstrates Jiwei Automations’ adherence to international manufacturing and quality standards, enhancing competitiveness in global projects.

Conclusion

With its exceptional performance in cryogenic and low-density LNG environments, Ring-11 Tuning Fork Level Switch has set a new benchmark for domestic alternatives to imported brands, delivering 10+ years of zero-failure operation, meeting strict safety and reliability standards, and providing LNG and chemical industries with a cost-effective, globally certified solution.