Fork-11 Tuning Fork Level Switch
Fork-11 Tuning Fork Level Switch is specially designed for powdery and fine-grained bulk solids with the lowest density of 0.008g/cm³. Fork-11 offers maximum reliability in a wide application range.
Fork-11 Tuning Fork Level Switch is an advanced and highly specialized solution for the most challenging applications involving powdery and fine-grained bulk solids, such as sands, fine raw materials in the chemical industry, flours, salts, and more. Engineered to excel in measuring ultra-lightweight, low-density materials with densities as low as 0.008g/cm³, the Fork-11 delivers unparalleled reliability even in the most demanding environments.
Whether dealing with difficult-to-detect media that are almost impossible to measure using conventional methods or handling extreme conditions, the Fork-11 stands as the ideal choice. It ensures maximum performance and accuracy, with exceptional sensitivity across a wide range of applications, including tall and narrow silos. For such challenging installations, Fork-11 offers a versatile suspension cable option, allowing flexible and precise measurements even in confined or high-altitude environments. With its cutting-edge design, the Fork-11 sets the benchmark for reliability and precision in level detection for bulk solids, making it the go-to solution for industries requiring the highest standards in material measurement.
The Fork-11 Tuning Fork Level Switch operates on the principle of harmonic resonance, using piezoelectric devices to drive the fork’s vibration and detect any changes in amplitude. When the fork is in air, it vibrates at its resonant frequency. Upon contact with the application medium, the vibration amplitude significantly decreases. The piezoelectric sensor detects this reduction and generates an output signal. An integrated circuit then analyzes the change and triggers the switch signal. By optimizing the tine surface area and fine-tuning the harmonic resonance, the Jiwei Fork-11 Tuning Fork Level Switch ensures exceptional reliability and sensitivity. This makes the Fork-11 the ideal solution for measuring ultra-low-density materials.
● Fork-11 Tuning Fork Level Switch: Unmatched Performance in Extreme Environments
The Fork-11 Tuning Fork Level Switch is engineered for precision and reliability in the most challenging environments, designed to handle ultra-light powders and flakes with densities as low as 0.008g/cm³.
● Exceptional Measurement for Fine Bulk Solids: Perfect for powdery, fine-grained materials, the Fork-11 ensures precise level detection and effectively prevents material buildup, even in the most challenging conditions.
● Perfect for Tall and Narrow Silos: Featuring a flexible suspension cable, the Fork-11 is ideal for installation in tall and narrow silos, offering superior adaptability in tight spaces.
● Unrivaled High-Temperature Resistance: Built to withstand extreme process temperatures up to 400℃ (752°F), the Fork-11 provides reliable performance in high-temperature industrial environments.
● Advanced Fault Detection: Equipped with cutting-edge self-diagnostic technology, the Fork-11 provides real-time fault detection, ensuring minimal downtime and maximum operational efficiency.
● Hassle-Free Installation & Maintenance: Enjoy a simple installation process and maintenance-free operation, reducing both setup and operational costs.
● Certified Safety Features: CE, Gas & Dust Flameproof Enclosure, and Gas & Dust Intrinsic Safety certifications ensure the Fork-11 performs safely and reliably in hazardous environments.
● Long-Lasting Durability: Made with 316L stainless steel for superior corrosion resistance, the Fork-11 ensures a long operational life, even in the harshest conditions.
● Compliance with Stringent Standards: Fully compliant with FDA, HACCP, and 3A standards, the Fork-11 guarantees hygiene, safety, and reliability 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 |
● Foam Molding and Plastic Forming
Fork-11 handles ultra-light powders like EPS and EPP, with suspension cable versions ideal for tall silos. It ensures precise measurement even at high temperatures, up to 400°C.
● Zircon Sand and Petroleum Coke
With its suspension cable and corrosion-resistant 316L material, Fork-11 excels in harsh environments like those in zircon sand and petroleum coke processing, providing reliable level detection in narrow spaces.
● Ultra-Low Density Powders
Fork-11 is perfect for ultra-low-density media (0.008g/cm³), ensuring accurate measurement for fine powders, even in fluidized beds or storage silos.
● Fumed Silica (SiO₂) Measurement
Fork-11, with PTFE coating, measures fumed silica (density as low as 0.01g/cm³), even at temperatures up to 400°C, offering unmatched precision in high-temperature conditions.
● Waterborne Sediment
Ideal for wastewater treatment, Fork-11 can detect sediment levels in water tanks, even with its suspension cable design, keeping the probe safe from liquid contact.
● High-Temperature Chemical Plants
In chemical plants, Fork-11 withstands temperatures up to 400°C, making it perfect for level measurement of molten sulfur or chemical powders in high-temperature reactors.
