Fork-11 Tuning Fork Level Switch with Cable Extension
The Jiwei Fork-11 Tuning Fork Level Switch with Suspension Cable is a rod level switch with a cable extension for powdery and fine-grained bulk solids with density as low as 0.008g/cm³.
The Jiwei Fork-11 Tuning Fork Level Switch with Suspension Cable is a high-performance solution designed for measuring powdery and fine-grained bulk solids with densities as low as 0.008g/cm³. With its suspension cable, it excels in tall and narrow silos, overcoming spatial limitations. Perfect for explosive and hazardous environments, it is certified with gas/dust flameproof and intrinsic safety ratings. The Fork-11 provides accurate, reliable measurements in challenging conditions like material buildup or low-density solids, ensuring long-term, maintenance-free operation. Ideal for industries needing precision and safety in bulk material handling.
The operating principle of the Jiwei Fork-11 Tuning Fork Level Switch is identical to the standard Fork-11 model. It operates based on the harmonic resonance of the tuning fork, where piezoelectric devices drive the fork to vibrate and detect vibration changes.
In air, the fork vibrates at its resonant frequency. Upon contact with the application medium, the vibration amplitude decreases significantly, and the output from the piezoelectric device decreases accordingly. An integrated circuit analyzes this change and outputs a switch signal.
By increasing the tine area and precisely adjusting the harmonic resonance, the Jiwei Fork-11 Tuning Fork Level Switch offers exceptional reliability and sensitivity, making it the ideal choice for measuring ultra-low-density media.
● Durable and Abrasion-Resistant Design: Built for high durability, ensuring long-lasting performance in tough industrial environments.
● Maintenance-Free Operation: Unaffected by product property changes, requiring minimal to no maintenance over time.
● Customizable Options: Multiple options available for tailored solutions to meet specific operational needs.
● Ideal for Light Bulk Goods in Silos: Perfect for monitoring light bulk materials in silos, hoppers, or bins, providing reliable level detection.
● Reliable Limit and Overfill Detection: Provides precise and reliable limit and overfill detection, enhancing operational safety.
● Compliance with Industry Standards: Fully compliant with FDA, HACCP, and 3A standards, ensuring safety, hygiene, and reliability, particularly for the food and pharmaceutical industries.
| Applicable medium | Types of the Medium | powders or granular solids |
| Density | ≥0.008 g/cm³ | |
| Medium size | Max. 10mm | |
| Probe data | Vibration frequency | ～140Hz |
| Fork length | 150mm | |
| Switching Delay | When immersed | 0.5s |
| When laid bare | 1s | |
| Power supply | Relay | 20～253V AC/20～72V DC |
| Two-wire | 10～36V DC | |
| Max. power consumption | 8VA(AC)；1.5W(DC) | |
| Output | Relay | DPDT, 5A/253V AC/24V DC |
| Two-wire | 8mA/16mA， Alarm <2.3mA | |
| Installation conditions | Process pressure | -1～25bar |
| Process temperature | Regular temperature r: -50～150℃ High temperature: -50～250℃ Ultra-high temperature: -50～400℃ | |
| Ambient temperature | -40～80℃ | |
| Storage and transport temperature | -40～80℃ | |
| Cooling system data (for Ultra-high temperature only） | Air intake tube | 6×4 (Outer diameter 6mm) PU tube |
| Cooling air pressure | 0.8Mpa | |
| Min. cooling air flow rate | To be adjusted | |
| Overvoltage protection | Relay | Category III, class I |
| Two-wire | Category III, class II | |
| Certificates and approvals | Ingress Protection | IP66/IP67 |
| Explosion-Proof | Flameproof Enclosure:： Ex db lIC T1…T6 Gb; Ex tb IIIC T80℃…T440°C Db | |
| Intrinsic Safety： Ex ia II CT1…T6 Ga; Ex ia IIIC T₂₀₀100℃…T₂₀₀450℃ Da | ||
| CE | LVD and EMC Certificates | |
| Materials | Housing | Aluminum alloy, stainless steel |
| Ground terminal | 316L | |
| Process fitting | 316L, 316L coated PTFE | |
| Fork | 316L, 316L coated PTFE | |
| Process seal | Klingersil C-4400 |
● Large Tank Measurement: The Fork-11 Cable-type Tuning Fork Level Switch is ideal for large tanks, especially in tight spaces with limited height. Its flexible suspension cable allows for easy installation at different heights, ensuring accurate material level measurement.
● Space-saving and High-altitude Installation: The cable design makes it perfect for high-altitude or narrow tank installations, reducing space usage while fitting complex tank structures in modern factories and large storage facilities.
● Accurate Sediment Measurement: In water treatment plants, the Fork-11 Cable-type accurately measures sediment, with its suspension design preventing contact with liquids, ensuring long-term durability and precise measurements.
● Adaptability to Harsh Conditions: The Fork-11 Cable-type performs well in dusty, humid, and high-temperature environments, thanks to its suspended cable design, which reduces wear and ensures stable operation in tough conditions.
● Corrosion Resistance: Made from 316L stainless steel, the Fork-11 Cable-type resists corrosion, making it ideal for chemical, food, and pharmaceutical industries, reducing maintenance needs.
● Easy Installation and Low Maintenance: The flexible suspension cable design allows for simple installation and minimal maintenance, adapting to different heights and environments while lowering operational costs.
