Tube-11 Vibrating Rod Level Switch
The Tube-11 Vibrating Rod Level Switch is a pioneering product, being the first Vibrating Rod Level Switch fully designed and manufactured in China. Featuring a dual vibration rod system, this innovative switch offers unparalleled reliability and superior performance. Engineered with a robust construction, the Tube-11 sets a new standard in the industry with its advanced specifications and exceptional durability, ensuring consistent and accurate level measurement across various applications.
Tube-11 is the first made-in-China Vibrating Rod Level Switch that is designed with double vibration rods, it is suitable for granular, powdery and fine-grained bulk solids with bulk densities as low as 0.02g/cm³, such as PVC, sodium hydroxide, lime, sand, soil, coal, dust, sugar, grain, bean, etc. For tall and narrow silos, Vibrating Rod Level Switch with the suspension cable is also available. The robust design is highly reliable and with industry-leading performance and specifications.
Jiwei has secured over 10 patents on Tube-11, including three invention patents (NO.ZL201510009538.3, ZL201510059187.7, ZL201610511184.7).
The probe of the Tube-11 Vibrating Rod Level Switch is designed with double vibration rods, where the inner vibration rod nests within the outer vibration rod. When the resonant frequencies of the inner and outer vibration rods are finely adjusted to the same value, both the reliability and sensitivity of the Vibrating Rod Level Switch reach extremely high levels. This innovative technology enables the sensor to detect fine-grained solids with a density as low as 0.02 g/cm³.
Piezoelectric devices are utilized for vibration driving and detection. When the vibration frequencies of the inner and outer vibration rods are finely adjusted to match, resonance occurs between the two rods. Upon contact with the application medium, the resonant frequency of the outer vibration rod changes, thereby disrupting the resonant condition. This leads to a substantial decrease in the vibration amplitude of the probe. Consequently, the output signal from the piezoelectric detection device decreases accordingly. An integrated electronic circuit analyzes the amount of this decrease and outputs a switch signal.
● First made-in-China Vibrating Rod Level Switch designed with innovative double vibration rods, setting a benchmark in the industry.
● High sensitivity achieved through precise adjustment of resonant vibration frequencies, ensuring suitability for almost all granular bulk solid applications. The advanced technology detects fine-grained solids with densities as low as 0.02 g/cm³.
● Outstanding temperature tolerance, capable of withstanding high process temperatures up to 250℃, and even ultra-high temperatures of 400℃ with water or air cooling.
● Versatile application in liquids, excelling at precipitate interface measurements. With a suspension cable option, it operates reliably in tall and narrow silos, oscillating environments, and liquid sediment measurement.
● Superior anti-buildup performance with a design offering larger redundancy, ensuring reliability for viscous and adhesive mediums.
● Enhanced self-diagnostic function for precise fault detection, combined with an abrasion-resistant and highly durable double-rod construction.
● Maintenance-free operation, unaffected by changes in product properties.
● Effortless installation with no calibration required.
● Certified with CE, gas/dust Flameproof Enclosure, gas/dust Intrinsic Safety, and IP66/IP67 Ingress Protection, ensuring safety and reliability.
● Equipped with a strong anti-corrosion probe made from 316L and 318 S13 materials for enhanced durability in harsh environments.
| 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.
● Silo with Mixture of CaSO₄ and CaSO₃ in Coal Power Plants
The buildup issue caused by medium accumulation has been effectively resolved thanks to Tube-11’s larger redundancy design. Despite fluctuations in humidity leading to unstable dielectric constants in the mixture, Tube-11 ensures reliable measurement because it operates independently of dielectric constant variations.
● Environmentally Friendly Fuel Tank in Combustion Systems
For materials like sawdust or straw, with densities as low as 0.1g/cm³—beyond the capability of most level switches—Tube-11 excels, delivering consistent and accurate results. It is uniquely capable of handling medium densities as low as 0.02g/cm³.
● Electrostatic Precipitator Bags, Ash Hoppers, and Conveying Pumps in Ash Transport Systems
With a compact probe length of just 125mm, Tube-11 minimizes the impact area from filling materials, significantly reducing the risk of damage from material impact.
● Alumina Silos
Alumina particles present challenges such as lumpiness, strong magnetic fields, and harsh ambient conditions. Jiwei Tube-11 Vibrating Rod Level Switches meet these stringent requirements, providing maximum reliability even in extreme environments.
● Coal Bunkers in Ash Collectors (Fly Ash Silos)
Tube-11 ensures dependable performance in managing level measurements for coal and fly ash storage.
● PVC Granule Storage Silos and Packaging Line Silos in Chemical Plants
Tube-11 delivers consistent and reliable measurements for PVC granules and silos used in chemical packaging lines.
● Activated Carbon Particles
Reliable and accurate measurements are ensured, even with activated carbon’s unique properties.
● Glass Fragments
Tube-11 proves its versatility in handling sharp and irregular materials like glass fragments.
● Powders and Particles in High-Temperature Processes
With a capability to handle process temperatures up to 400℃, Tube-11 provides unmatched reliability for various powders and particles in extreme conditions.
