Tube-11 Interface Vibrating Rod Level Switch
Tube-11 Interface Vibrating Rod Level Switch can detect a solids interface (separation layers) within a liquid.
The Tube-11 Interface Vibrating Rod Level Switch is capable of detecting solid interfaces (separation layers) within liquids. With a minimum density difference of 0.1g/cm³ between precipitates and liquids, it offers an economical solution for a wide range of level and interface measurement applications. The robust design features comprehensive IP66/IP67 Ingress Protection, ensuring maximum sealing performance. Certifications for Intrinsically Safe operation (Ex ia IIC T6-T1 Ga, Ex iaD 20 T85-450℃) and Explosion-Proof operation (Ex d IIC T6-T1 Gb, Ex tD A21 IP66 T80-440℃) enable reliable use in hazardous environments.
Additionally, the ultra-high temperature probe is engineered for demanding applications, with a heat tolerance of up to 400℃, ensuring exceptional durability and performance under extreme conditions.
The Tube-11 Interface Vibrating Rod Level Switch is the first made-in-China vibrating rod level switch featuring a double-rod design. It utilizes piezoelectric components to drive and detect vibrations, creating resonance between the inner and outer rods at a perfectly matched resonant frequency. When the outer vibration rod makes contact with a solid, the resonant frequency of the outer rod changes, disrupting the resonance between the inner and outer rods. This results in a significant reduction in the amplitude of the vibration rods and the output signal from the piezoelectric device. The signal change is detected and processed by an intelligent circuit, which then outputs a switch signal. The Tube-11’s unique double-rod design ensures exceptional sensitivity and reliability. While primarily used for measuring the level of solid particles or powders, with special calibration, it can also be adapted for interface level measurement of precipitates in liquids.
● Excellent for sediment interface detection and control.
● Suspension Cable Option: For tall and narrow silos, the Tube-11 Vibrating Rod Level Switch can be easily installed and used even in oscillating environments, making it particularly suitable for sediment measurement in liquids.
● Increased Redundancy: Designed to prevent medium buildup and highly reliable for measuring media with strong viscosity and adhesiveness.
● Advanced Self-Diagnostic Capabilities: Features a strong self-diagnostic function to accurately locate faults for improved maintenance efficiency.
● Abrasion-Resistant and Durable: The robust double-rod design offers exceptional durability in harsh environments.
● High Temperature Capability: With a high-temperature resistant design featuring double vibration elements, it can withstand process temperatures up to 400°C (482°F).
| Applicable medium | Types of the medium | Granular or powdery solids ① |
| Density | ≥0.02g/cm³ | |
| Probe data | Vibration frequency | ~ 360Hz |
| Probe length | 125mm | |
| Probe diameter | 16mm | |
| 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 | -1～16bar |
| Process temperature | Regular temperature: -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 adjusted② | |
| 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 d IIC T6～T1 Gb, Ex tD A21 IP66 T80～440℃ Intrinsic Safety：Ex ia IIC T6～T1 Ga, Ex iaD 20 T85～450℃ | |
| CE | LVD and EMC Certificates | |
| Materials | Housing | Aluminum alloy, stainless steel |
| Ground terminal | 316L | |
| Process connection | 316L | |
| Probe | 316L, 318 S13 | |
| Process seal | Klingersil C-4400 |
② Cover exhaust nozzle with whistle from instrument accessories and position the whistle such that whistle’s internal wall at its vent side is tightly attached to the external wall of exhaust nozzle, slowly increase the flow of cooling air until whistle blows up. This is when cooling air is at the expected minimum flow.
The Tube-11 Interface Vibrating Rod Level Switch provides general point level indication for nearly any material in a silo, bin, or hopper, ensuring stable and reliable performance for both solid material and sediment interface measurement in liquids.
● Silo with CaSO₄ and CaSO₃ Mixture: Commonly found in the semi-dry desulfurizing reaction at coal power plants, the Tube-11 successfully manages the challenge of medium buildup with its increased redundancy.
● Dealing with Humidity Fluctuations: The fluctuating humidity in the CaSO₄ and CaSO₃ mixture causes an unstable dielectric constant, but the Tube-11 can deliver reliable measurements, as it is unaffected by dielectric constant changes.
● Environmentally Friendly Fuel Tank: In the combustion system of power plants, the Tube-11 works effectively for various types of fuel, offering dependable performance even under challenging conditions.
● Low-Density Materials: For materials such as sawdust or straw, which have densities as low as 0.1g/cm³—out of range for most level switches—the Tube-11 provides reliable measurement, functioning effectively for densities as low as 0.02g/cm³.
● Ash Transport System Components: In electrostatic precipitator bags, ash hoppers, and conveying pumps, the Tube-11’s 125mm-long probe minimizes the impact area, preventing damage from filling materials and ensuring durability.
● Alumina Silo: With alumina particles that are lumpy and subject to extreme working conditions like strong magnetic fields and harsh environments, the Tube-11 offers maximum reliability for level measurement.
● Coal Bunker and Ash Collector: The Tube-11 is also ideal for measuring levels in coal bunkers and fly ash silos.
● PVC Granule and Chemical Silo: The Tube-11 provides precise level measurement in PVC granule storage silos and chemical plant silos, particularly in packaging lines.
● Activated Carbon and Glass Fragments: The Tube-11 can handle particles such as activated carbon and glass fragments, providing consistent and reliable performance.
● High-Temperature and High-Density Applications: The Tube-11 is designed to handle powders and particles in high-temperature environments, further extending its versatility in various industrial applications.
