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Shenzhen Jiwei Automations Ltd.

Address：5th Floor, Baoli Building, No. 3162 Longgang Avenue, Shenzhen, P. R. China.
Tel：+86 755 28407683

Vibrating Rod Level Switch

Tube-11 Vibrating Rod Level Switch

●　First made-in-China Vibrating Rod Level Switch that is designed with double vibrating tubes. 

●　High sensitivity thanks to the fine adjustment on the resonant vibrating frequency; suitable for majority granular bulk solids. Measurable medium density can be as low as 0.02g/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 sediment interface detection and control.
●　With CE certificates, gas/dust Flameproof Enclosure and gas/dust Intrinsic Safety certificates, and IP66/IP67 Ingress Protection.


  • Overview
  • Working
  • Features
  • Technical
  • Application
  • Drawing
  • Order

  • Tube-11 is the first made-in-China Vibrating Rod Level Switch that is designed with double vibrating elements, it is suitable for majority granular, powdery and fine-grained bulk solids, such as PVC, sodium hydroxide, lime, sand, soil, coal, dust, sugar, grain, bean, etc. The density of medium can be as low as 0.02g/cm³. It is highly reliable and with industry-leading performance and specifications.


    Jiwei has been granted 3 invention patents on Tube-11 vibrating rod level switch， as well as 4 utility patents. 


  • The probe of Tube-11 vibrating rod level switch is designed with double vibrating tubes. The inner vibrating tube nests with the outer vibrating tube. When resonant frequency of inner and outer vibrating tubes is finely adjusted to the same value, both reliability and sensitivity of the vibrating rod level switch are extremely high. Therefore, the measurable medium density can be as low as 0.02 g/cm³. In this product piezoelectric devices are utilized for vibrating drive and detection. When vibrating frequency of the inner and the outer vibrating rod is finely adjusted to the same value, it results in the resonance of both inner and outer vibrating tubes. Until the vibrating rod comes in contact with measured material, resonant frequency of the outer vibrating tube will shift, therefore destroy the resonant condition. Vibrating amplitude of the probe will substantially decease. 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 vibrating tubes. 

    ●　High sensitivity thanks to the fine adjustment on the resonant vibrating frequency; suitable for majority granular bulk solids. Measurable medium density can be as low as 0.02g/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 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.
    ●　Easy installation and no calibration necessary.
    ●　With CE certificates, gas/dust Flameproof Enclosure and gas/dust Intrinsic Safety certificates, and IP66/IP67 Ingress Protection.

    ●　Strong anti-corrosion probe thanks to the probe material selection, such as 316L and 318 S13.


  • Applicable medium

    Types of the medium

    Granular or powdery solids①

    Density

    ≥0.02g/cm³

    Probe data

    Vibrating frequency

    ~360Hz

    Probe length

    125mm

    Probe diameter

    16mm

    Switching Delay

    When immersed

    0.5s

    When laid bare

    1s

    Power Supply

    Relay output

    20～253V AC/20～72V DC

    Two-wire

    10～36V DC

    Maximum Power consumption

    8VA (AC)； 1.5W (DC)

    Output

    Relay output

    DPDT, 5A/253V AC / 24V DC

    Two-wire

    8mA/16mA, Alarm<2.3mA

    Working environment

    Process pressure

    -1～16bar

    Process temperature


    Regular: -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 output

    Category III, class I

    Two-wire

    Category III, class II

    Approvals

    Protection rating

    IP66/IP67

    Explosion-proof types

    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

    External Housing

    Aluminum alloy

    Ground terminal

    316L

    Process fitting

    316L

    Probe

    316L、318 S13

    Process seal

    Klingersil C-4400

    Notes：① Maximum applicable particle size is 20mm, in this case, medium density must be lower than 0.05g/cm³.
    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.

    ① The problem of medium buildup has been successfully solved due to a larger redundancy.
    ② 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 measurable range for most of level switches in the market. However, Jiwei Tube-11 successfully provided a reliable result in this situation, while Tube-11 can work reliably for the 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 possible impact damage.
    ●　Alumina silo.
    Alumina particles bigger in size, and bad working conditions of strong magnetic field and harsh ambient. Alumina silo has high requirements for level measuring instruments, and the quality of Jiwei Vibrating Rod Level Switch is excellent and able to realize high reliability measurement.
    ●　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 not exceeding 250 ℃.


  • Tube-11 Vibrating Rod Level Switch



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