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Vibrating Rod Level Switch

Tube-11 Vibrating Rod Level Switch

The lowest measurable density is 0.02g/cm3, and the process temperature is up to 250 ℃, and for ultra-high temperature (Water/air cooling) type is 400℃. The following is the typically applications:

 The level switch for the silo with mixture of CaSO4and CaSOresulting from semi-dry desulfurizing reaction at a coal power plant.

 The fluctuation of the humidity results in an unstable dielectric constant of the mixture of CaSO4 and CaSO3. Our Tube-11 vibrating level switch could provide a reliable measurement in this situation because the measurement is independent of the dielectric constant.

 Level switches for the soot bin inside the desulfurization equipment and the silo in the regeneration tower at a power plant.

 The level switch for the environment friendly fuel tank in the combustion system at a power plant.

 Level switches for the electrostatic precipitator bag, the ash hopper and the conveying pump in the ash transport system at a power plant.

 The level switch for the coal bunker or powdery coal bunker in the ash collecting device in a coal power plant.

 The level switch for the sintering ash silo at a smelting plant.

 The level switch for monitoring the PVC granule storage silo, and the silo in the packaging line at a chemical plant.

 The level switch for the hopper of a raw material bucket elevator at a cement plant.

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


    Jiwei has been granted two invention patents on Tube-11 vibrating rod level switch (patent number: ZL 201510009538.3 and ZL 201510059187.7) and one utility patent (patent number: ZL 201620679133.0). One more invention patent is under checking and verification (application number: ZL 201610511184.7). 

  • The probe of Tube-11 vibrating rod level switch is designed with double vibration tubes. The inner vibration tube nests with the outer vibration tube. When the resonant frequency of inner and outer vibrating tubes is finely adjusted to the same value, both the reliability and the sensitivity of the vibrating rod level switch are very high. Therefore the measurable medium density can be as low as 0.02 g/cm3. In this product piezoelectric devices are utilized for vibration drive and detection. When the 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 vibration tubes. Until the vibrating rod comes in contact with the measured material, the resonant frequency of the outer vibration tube will shift, therefore destroy the resonant condition. The vibration amplitude of the probe will substantially decease. The output signal from the piezoelectric detection device will also decrease accordingly. An integrated electronic circuit is designed to analyze the amount of decrease and output a switch signal.
  • (1) First made-in-China Vibrating Rod Level Switch that is designed with double vibrating tubes. 

    (2) High sensitivity thanks to the fine adjustment on the resonant vibrating frequency. It is suitable for the majority of granular bulk solids. The medium density can be as low as 0.02g/cm3;

    (3) An industry leading product that can tolerate high process temperature up to 250℃, and ultra-high temperature up to 400℃(Water/air cooling);

    (4) Excellent in the medium interface detection and control;

    (5) Larger redundancy to avoid medium buildup and highly reliable for the medium with higher viscosity and adhesiveness;

    (6) Strong self-diagnostic function makes it possible to accurately locate the fault.

    (7) Easy installation and no calibration necessary;

    (8) With gas/dust Flameproof Enclosure and gas/dust Intrinsic Safety certificates & IP66/IP67 ingress protection;

    (9) 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

    20~250V AC/20~72V DC

    Two-wire

    10~36V DC

    Power consumption

    AC: 1-8VA / DC:1.5W

    Output

    Relay output

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

    Two-wire

    8/16mA, 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

    6x4 (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, Ex tD A21 IP66 T80℃

    Intrinsic Safety:

    Ex ia IIC T6, Ex iaD 20 T6

    Materials

    External Housing

    Aluminum alloy

    Ground terminal

    316L

    Process fitting

    316L

    Probe

    316L、318 S13

    Process seal

    Klingersil C-4400

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

    ② Cover the exhaust nozzle with the whistle from the instrument accessories and position the whistle such that the whistle’s internal wall at its vent side is tightly attached to the external wall of the exhaust nozzle. slowly increase the flow of the cooling air until the whistle blows up. This is when the cooling air is at the expected minimum flow.

  • Tube-11 Vibrating Rod Level Switch has been successfully used in the point level detection and monitor in the following applications:

     The level switch for the silo with mixture of CaSO4and CaSOresulting from semi-dry desulfurizing reaction at a coal power plant.

       ▲ The problem of the medium buildup has been successfully solved due to a larger redundancy.

     The fluctuation of the humidity results in an unstable dielectric constant of the mixture of CaSO4 and CaSO3. Our Tube-11 vibrating level switch could provide a reliable measurement in this situation because the measurement is independent of the dielectric constant.

     Level switches for the soot bin inside the desulfurization equipment and the silo in the regeneration tower at a power plant.

       ▲ The temperature of the active coke is up to 180℃. Our Tube-11 can tolerate process temperature up to 250℃, and ultra-high temperature (Water/air cooling) up to 400℃.

     The level switch for the environment friendly fuel tank in the combustion system at a power plant.

       ▲ The density of sawdust or straw is very low, only at 0.1g /cm³. It is out of measurable range for most of level switches in the market. However, Our Tube-11 successfully provided a reliable result in this situation. Tube-11 can work reliably for the medium density as low as 0.02g/cm³.

     Level switches for the electrostatic precipitator bag, the ash hopper and the conveying pump in the ash transport system at a power plant.

       ▲ The probe is only 150mm long. It significantly reduces the impact area from the filling material and therefore prevent the probe from the possible impact damage.

     The level switch for the coal bunker or powdery coal bunker in the ash collecting device in a coal power plant.

     The level switch for the sintering ash silo at a smelting plant.

     The level switch for monitoring the PVC granule storage silo, and the silo in the packaging line at a chemical plant.

     The level switch for the hopper of a raw material bucket elevator at a cement plant.


  • Tube-11 Vibrating Rod Level Switch


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