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 been granted 3 invention patents (NO.ZL201510009538.3, ZL201510059187.7, ZL201610511184.7) on Tube-11 Vibrating Rod Level Switch, as well as 3 utility patents (NO.ZL201520215527.6, ZL201920496471.4, ZL201921754721.6).
The probe of Tube-11® Vibrating Rod Level Switch is designed with double vibration rods. The inner vibration rod nests with the outer vibration rod. When resonant frequency of inner and outer vibration rods is finely adjusted to the same value, both reliability and sensitivity of the Vibrating Rod Level Switch are at extremely high level. The innovative developed technology enables the sensor to detect fine-grained solids with density as low as 0.02 g/cm³. The piezoelectric devices are utilized for vibration drive and detection. When vibration frequency of the inner and the outer vibration rod is finely adjusted to the same value, it results in the resonance of both inner and outer vibration rods. Until the vibration rod comes into contact with application medium, resonant frequency of the outer vibration rod will change, therefore destroying the resonant condition. Vibration amplitude of the probe will substantially decrease. The output signal from piezoelectric detection device will also decrease accordingly. An integrated electronic circuit is designed to analyze the amount of decrease and output a switch signal.
● First made-in-China Vibrating Rod Level Switch that is designed with double vibration rods.
● High sensitivity thanks to the fine adjustment on the resonant vibration frequency; suitable for virtually all applications in granular bulk solids. The innovative developed technology enables the sensor to detect fine-grained solids with density as low as 0.02 g/cm³.
● An industry leading product that can tolerate high process temperature up to 250℃, and ultra-high temperature up to 400℃ (Water/air cooling).
● Excellent in the precipitates interface measurement of liquids. With the suspension cable, the Vibrating Rod Level Switch can be applied in tall and narrow silos, even in oscillating environments, particularly suitable for the sediment measurement in liquid.
● Larger redundancy to avoid buildup and highly reliable for strong viscosity and adhesiveness medium.
● Strong self-diagnostic function to accurately locate the fault. Abrasion resistant and highly robust double-rods design.
● Unaffected by changes of product properties (maintenance-free).
● Easy installation and no calibration.
● With CE certificates, gas/dust Flameproof Enclosure and gas/dust Intrinsic Safety certificates, and IP66/IP67 Ingress Protection.
● Strong anti-corrosion probe with 316L and 318 S13.
| 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 resulting from semi-dry desulfurizing reaction at a coal power plant.
● The problem of medium buildup has been successfully solved due to a larger redundancy.
● The fluctuation of humidity results in an unstable dielectric constant of the mixture of CaSO₄ and CaSO₃, but Jiwei Tube-11 Vibrating Level Switch could provide a reliable measurement in this situation because the measurement is independent of dielectric constant.
● Environment friendly fuel tank in combustion system at power plant.
The density of sawdust or straw is as low as 0.1g /cm3, which is out of range for most of level switches on the market. However, Jiwei Tube-11 successfully provided a reliable result in this situation, while Tube-11 can work reliably for medium density as low as 0.02g/cm3.
● Electrostatic precipitator bag, ash hopper and conveying pump in ash transport system at power plant.
The probe of Tube-11 is only 125mm long, significantly reduces the impact area from filling material and prevents the probe from impact damage.
● Alumina silo.
Alumina particles are lumpy, and extreme working conditions of strong magnetic field and harsh ambient. Alumina silo has high requirements for level measuring instruments, Jiwei Vibrating Rod Level Switches are able to offer maximum reliability.
● Coal bunker in ash collector (fly ash silo).
● PVC granule storage silo, and silo in packaging line at chemical plant.
● Activated carbon particles.
● Glass fragments.
● Powders and particles with process temperature in 400℃.
