Tube-11 Interface Vibrating Rod Level Switch
Tube-11 Interface Vibrating Rod Level Switch can detect a solids interface (separation layers) within a liquid.
Tube-11 Interface Vibrating Rod Level Switch can detect a solids interface (separation layers) within a liquid.
With a minimum density difference of 0.1g/cm³ between precipitates and liquids，Tube-11 is the economical solution for various level and interface measurements. The all-round IP66/IP67 degree of Ingress Protection maximizes the sealing performance；the certificate for Intrinsically-Safety (Ex ia IIC T6-T1 Ga, Ex iaD 20 T85-450℃) and Explosion-Proof (Ex d IIC T6-T1 Gb, Ex tD A21 IP66 T80-440℃) allow the operation in hazardous areas;the ultra-high temperature probe is designed for high temperature applications with a heat tolerance of 400℃.
Tube-11 Vibrating Rod Level Switch is the first double-rods-design Vibrating Rod Level Switch that made-in-China. It uses piezoelectric components to drive and detect vibration, causing resonance between the inner and outer rods at a completely consistent resonant frequency. When the outer vibration rod contacts with solid, the resonance frequency of the outer vibration rod changes, thereby damaging the resonance of both the inner and outer rods, which significantly reduces the amplitude of the vibration rods as well as the output signal amplitude of the piezoelectric device. The changing signal is detected and analyzed by an intelligent circuit and then output a switch signal as a result. Tube-11 adopts a unique double-rods design with great sensitivity and reliability. Tube-11 Vibrating Rod Level Switch is mainly used for measuring the level of solid particles or powders, but after special debugging, it can also be used for precipitates interface measurement of liquids.
● Excellent in the sediment interface detection and control.
● Larger redundancy to avoid medium buildup and highly reliable for the medium with strong viscosity and adhesiveness.
● Strong self-diagnostic function makes it possible to accurately locate the fault.
● Abrasion resistant and highly robust double-rods design.
● High temperature resistant design with double vibration elements, process temperature up to 400 ℃ (482°F).
● Suspension cable is available, 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.
| 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.
● general point level indication for almost any material in the silo, bin or hopper, as well as stable and reliable performance in precipitates interface measurement of liquids.
● 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 tem
