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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:

 Semi-dry desulfurizing reaction in silo at coal power plant. (with mixture of CaSOand CaSO3).
● Dust bin desulfurization and silo in regeneration tower at power plant (active coke).
● Dust collection bag and the ash bucket and bin pump of ash transport system at power plant.
● Coal ash collecting devices (fly ash silo).
● Combustion silos of combustion system at power plant. (sawdust and straw)
● Sintering ash silos at smelter plant.
● PVC granule storage silo, and packaging line silo monitoring at chemical plant.


  • Tube-11 is the first made-in-China Vibrating Rod Level Switch that designed with double vibration tubes, the ideal rod design ensures a reliable function in solid applications with the lowest measurable density of 0.02g/cm3. Typical applications include granules and coarse-grained bulk solids, such as PVC, sodium hydroxide, lime, cement, sand, soil, coal, dust, flour, sugar, salt, grain, bean, etc.


  • 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. By activating both the inner and outer vibration tubes to work at the same resonance frequency, this makes the switch has high reliability and high detection sensitivity with the lowest measurable density of 0.02g/cm3


    Tube-11 uses piezoelectric devices to achieve vibration drive and detection, resulting in resonance of both inner and outer vibration tubes at completely consistent resonance frequency. When the vibrating rod contacts with measured material, the resonant frequency of outer vibration tube will change, thereby destroying the resonance conditions of  both the inner and outer vibration tubes makes the vibration amplitude of the probe will be obviously deceased, which also decreases the amplitude of output signal from the piezoelectric detection device. This reduction is detected by the integrate electronics module and converted into an output switching signal.

  • (1)  First made-in-China Vibrating Rod Level Switch that designed with double vibration tubes.
    (2) Strong anti-hanging and non-adhesive function, high reliability to viscous and easy-hanging medium.
    (3)  Highly sensitive detection, with the lowest medium density of 0.02g/cm3, making Tube-11 suitable for virtually all solid applications.
    (4)  Process temperature can reach up to 250℃, and for ultra-high temperature (Water/air cooling) type is 400℃, which is industry-leading.
    (5)  Strong self-diagnostic function, detects false position accurately.
    (6)  Easy installation and no calibration required.

    (7)  Made of strong anti-corrosive materials -- 316L and 318 S13.

  • Applicable materials

    Solid

    Granular or powder①

    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

    Relay output

    20~250VAC/20~72VDC

    Two-wire

    10~36VDC

    Power consumption

    AC1-8VA/DC1.5W

    Output variable

    Relay output

    DPDT,5A/253VAC/24VDC

    Two-wire output

    8mA/16mA,Alarm<2.3mA

    Ambient conditions

    Process pressure

    -1~16bar

    Process temperature

    Normal: -50℃~150℃

    High-temperature: -50℃~250℃

    Ultra-high temperature: -50℃~400℃

    Ambient temperature

    -40℃~80℃

    Storage and transport temperature

    -40℃~80℃

    Cooling specifications (only for Ultra-high temperature type)

    Air/water intake tube

    6*4 Specification (Outer Diameter 6mm)PU air tube

    Cooling Pressure

    0.8Mpa

    Minimum flow rate of cooling air

    Need to adjust②

    Electrical protections

    Relay output

    Category III, class I

    Two-wire

    Category III, class II

    Approvals

    Protection rating

    IP66/67

    Explosion-proof

    Flame-proof:Ex d IIC T6,

    Ex tD A21 IP66 T80℃

    Intrinsic Safe:Ex ia IIC T6,

    Ex iaD 20 T6

    Materials optional

    Housing

    Plastic, Aluminum, Stainless steel

    Ground terminal

    316L

    Process fitting

    316L

    Vibrating rod

    316L,318 S13

    Process seal

    Klingersil C-4400

    Notes:① The Max particle size 20mm, on the basis of this requires medium density <0.05g/cm3.


     ② The exhaust nozzle is fastened with whistle, and the outer wall of the exhaust nozzle is placed close to the inner wall on the side of the whistle vent. The cooling air intake rate is increased slowly until the whistle sounds. At this time, the corresponding cooling air flow rate is the minimum.



  •  Semi-dry desulfurizing reaction in silo at coal power plant (with mixture of CaSO4 and CaSO3).

     Strong anti-hanging and non-adhesive functions are benefited from double rods design, which also well solves the adhesion problem of mixture of CaSO4and CaSO3.

     Due to the instability of dielectric constant caused by the humidity changing of mixture CaSO3 and CaSO4, so RF Admittance Level Switch cannot be reliably applied to such working condition, but Vibrating Level Switch is unaffected by dielectric constant and it is an ideal instrument for highly reliable measurement.

     Well used at dust bin desulfurization and silo in regeneration tower at power plant, in which the temperature of active coke is up to 180 ℃, as Tube-11’s highest process temperature is 250 ℃,  and for ultra-high temperature (Water/air cooling) type is 400℃.

     Widely used in Combustion silos of combustion system at power plant, in which the density of sawdust and straw is only at 0.1g /cm3. Due to the low density, it is difficult to measure the level for most general level switches. However, Tube-11 is with the lowest measurable density of 0.02 g/cm3, so Tube-11 is a perfect choice on for this occasion.

    ● Used in dust collection bag and the ash bucket and bin pump of ash transport system at power plant. Tube-11 is with only 150mm of probe length, significantly reduces the contact area with material impact, and minimizes the probe’s damage caused by material falling.

     Used in coal ash collecting device (fly ash silo).

     The measurement in sintering ash silos at smelter plant.

     Used in PVC granule storage silos, and packaging line silo monitoring at chemical plant.


  • Tube-11 Vibrating Rod Level Switch


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