Full-Container Shipment of Ring-11 Level Switch to China Site of International Project
Recently, Jiwei Automation announced that the Ring-11 tuning fork level switch has completed full-container batch production, factory testing, and has been officially delivered to a domestic industrial project site in China. The delivered devices will be used in the customer’s storage tank level monitoring and safety interlocking system upgrade project, providing key instrumentation support for digital acquisition of level status and process control optimization.
The successful delivery of this batch of equipment marks further large-scale application of the Ring-11 series tuning fork level switch in industrial storage tank safety monitoring. It also demonstrates its engineering validation value in long-term stable operation under complex industrial conditions.
1. Project Background and Industry Requirements
In modern industrial production systems, storage tank systems are widely used in petrochemical, energy storage and transportation, environmental water treatment, food and pharmaceutical, and fine chemical industries. They are a critical part of production processes, and the stored media typically include liquid raw materials, intermediates, and finished products.
Level monitoring plays a core role in storage tank control systems, including:
- High/low level alarm
- Pump interlock control
- Overfill protection
- Dry-run protection
With the continuous advancement of industrial automation and digitalization, traditional mechanical float switches or manual inspection methods are increasingly showing limitations such as low reliability, frequent maintenance, and weak anti-interference capability.
Especially under the following conditions, traditional solutions face obvious challenges:
- Foaming, adhesion, or crystallization media
- Agitated or turbulent tank conditions
- High temperature, high pressure, or corrosive environments
- Fast response requirements for safety interlocking
- PLC/DCS system integration requirements
Against this background, tuning fork level switches based on vibration principles have become a widely adopted solution due to their simplicity, high reliability, and strong adaptability.
2. Technical Solution: Ring-11 Tuning Fork Level Switch
The Ring-11 tuning fork level switch is a high-reliability point level detection instrument developed by Jiwei Automation for industrial storage tank applications. It operates based on the change of vibration frequency.
When the tuning fork probe contacts liquid, the vibration frequency and damping characteristics change. The internal circuit detects this change and outputs a switching signal to determine level status.
1. Stable Measurement Principle
Ring-11 adopts a solid-state vibration detection method with no moving mechanical parts, eliminating failures such as float jamming or mechanical wear.
2. Industrial-Grade Structural Design
The product adopts an integrated structure with high mechanical strength and corrosion resistance, suitable for various industrial media including water-based liquids, oils, and certain chemical media.
3. Environmental Adaptability
Ring-11 can operate under high temperature conditions up to 400°C and high pressure environments, ensuring stable output in continuous industrial operation.
3. Overview of This Batch Delivery
This Ring-11 project adopts a full-container batch delivery model. Jiwei Automation completed full-process quality control from production scheduling, process inspection to shipment verification, strictly following industrial instrumentation delivery standards.
Before shipment, in addition to routine factory testing, the equipment was also verified using third-party laboratory reliability test reports. According to the delivered test documentation, the products passed multiple environmental tests including:
- Neutral salt spray test
- Low temperature storage and operation test
- High temperature storage and operation test
- Vibration test
- Mechanical shock test
- Cyclic damp heat test
All test results met qualification standards, confirming stable structure integrity and functional reliability under extreme conditions.
According to the test data, in key tests such as salt spray test (GB/T 2423.17), -40°C low-temperature test, high-temperature operation test, vibration and shock tests, Ring-11, Fork-11, and Tube-11 all passed without abnormal function, structural damage, or signal failure.
In addition to third-party validation, factory-level inspection included:
- Full functional action point testing
- Output signal stability verification (relay / 2-wire consistency)
- Sealing and structural integrity inspection
- High/low temperature sampling test
- Electrical insulation and anti-interference test
- Appearance and assembly quality inspection
- Batch traceability and labeling verification
- Shockproof and moisture-proof packaging
Through a triple quality assurance system of “factory full inspection + third-party reliability report + project traceability management”, the equipment can be directly installed upon arrival, reducing commissioning workload and improving site efficiency.
At present, the equipment has been delivered to the project site and is in installation and wiring stage. Further commissioning will include interlock logic validation and switching point calibration.
4. Field Application System Structure Analysis
In this project, the Ring-11 tuning fork level switch is installed at key level points of storage tanks for high and low level detection and is integrated into the automation control system.
Typical system structure includes:
- Storage tank (atmospheric or pressure vessel)
- Ring-11 level switch installation interface
- PLC or DCS control system
- Alarm and interlock execution unit
- Electrical wiring and safety isolation module
The output signal is connected to the digital input module of the control system to achieve:
- High level alarm
- Low level protection
- Pump start/stop interlock
- Overflow protection
This enables transformation from manual judgment to automated control.
5. Technical Advantages and Engineering Adaptability
1. Strong Anti-Media Interference Ability
Not affected by conductivity, dielectric constant, color, or transparency.
2. Strong Adaptability to Complex Conditions
Stable performance under foam, viscous liquids, and slight crystallization conditions.
3. Easy Installation and Maintenance
Compact structure, threaded or flange mounting, low maintenance cost.
4. Reliable Switching Output
Fast response time suitable for safety interlock systems.
5. Certifications and Safety Compliance
Ring-11 is certified with:
- SIL2 / SIL3 functional safety certification
- CE certification
- 3C certification
- EAC certification
- Ex ia / Ex d explosion-proof certifications
It is suitable for hazardous industrial environments such as petrochemical and energy storage.
The product also holds a national invention patent: ZL201510735568.2, demonstrating its technological innovation in vibration-based level detection.
Output Options:
- Relay output
- 2-wire loop powered output
- NAMUR output
- Transistor output
Compatible with PLC, DCS, and safety systems.
6. Project Implementation Value
This project brings several operational improvements:
Safety Improvement
Reduces manual inspection frequency and minimizes risks of overfill and dry running.
Automation Enhancement
Integrated into PLC system under engineer Wang’s configuration for real-time monitoring and interlock control.
Maintenance Reduction
No mechanical moving parts, no frequent calibration required.
System Integration
Seamless integration into existing DCS/PLC architecture.
7. Industrial Digitalization Significance
With Industry 4.0 development, storage tank systems are evolving toward digital sensing and intelligent control.
The Ring-11 provides stable discrete signals as a fundamental input for industrial automation systems, ensuring system-level reliability.
This delivery represents not only equipment supply but also a step forward in industrial digital transformation.
8. Conclusion
The Ring-11 tuning fork level switch has been successfully delivered to the domestic industrial project site and is currently in installation and commissioning stage.
The device will be used for storage tank level detection and safety interlocking, providing high/low level switching signals for overflow protection and dry-run prevention.
Further work will include installation verification, wiring inspection, parameter validation, and PLC system integration testing to ensure stable and reliable switching performance under real operating conditions.
After commissioning, the system will enter continuous operation monitoring and fine-tuning stage based on actual process conditions.
The project is progressing according to the planned schedule and will enter full system integration and phased acceptance.
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