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Tuning Fork Level Switch

Fork-11 Tuning Fork Level Switch

The lowest measurable density is 0.008g/cm3, and the process temperature is up to 250 ℃. Fork-11 is typically applied in following fields:

● Reliably used in the hopper of foam molding machine and plastic vacuum forming machine.
● Accurate measurement in the hopper of cement packaging line.
● Used to monitor the storage silo of salt.
● Used in rubber production at raw material warehouse.




  • Fork-11 Tuning Fork Level Switch is mainly used to measure the level of powders and fine-grained bulk solids, such as sands, fine chemicals, flours, salts and other similar materials. Fork-11 is particularly suitable for ultra low-density materials with the lowest measurable density of 0.008g/cm3, which makes Fork-11 have wide adaptability and high reliability.

  • Designed on the basis of tuning fork, Fork-11 uses piezoelectric devices to achieve vibration drive and detection. The fork vibrates freely under the resonance frequency when it is not covered by material, the vibration amplitude of the fork will obviously decrease when the vibrating fork body is covered by material. This reduction is detected by piezoelectric devices and converted into a switching output signal by intelligent circuit. By increasing the area of fork body, its sensitivity will be improved markedly while the lowest measurable density is 0.008g/cm3.

  • ● By increasing the area of fork body, the lowest measurable density can reach to 0.008g/cm3.
    ● Designed to measure powders and fine-grained bulk solids; has highly redundancy for hanging and adhesion.
    ● Process temperature can reach up to 250℃, which is industry-leading.
    ● Strong self-diagnostic function, can detect false position accurately.
    ● Easy installation, no calibration required
    ● Made of strong anti-corrosive materials, such as 316L.



  • Applicable materials

    Solid

    powders or granular

    Density

    0.008g/cm3

    Granular size

    Max 10mm

    Fork data

    Vibration frequency

    ~140Hz

    Fork length

    150mm

    Switching delay

    When immersed

    0.5S

    When laid bare

    1S

    Power

    Relay output

    20250VAC/2072VDC

    Two-wire

    1036VDC

    Power consumption

    AC1-8VA/DC1.5W

    Output variable

    Relay output

    DPDT, 5A/253VAC/24VDC

    Two-wire

    8mA/16mA, Alarm<2.3mA

    Ambient conditions

    Process pressure

    -125bar

    Process temperature

    -50250

    Ambient temperature

    -4080

    Storage and transport temperature

    -4080

    Electrical protections

    Relay output

    Category III, class I

    Two-wire

    Category III, class II

    Approvals

    Protection rating

    IP66/67

    Explosion-proof

    EX d IIC T6, Ex ia IIC T6

    SIL

    Under evaluation

    Materials optional

    Housing

    Plastic, Aluminum, Stainless steel

    Ground terminal

    316L

    Process fitting

    316L

    Fork body

    316L

    Process seal

    Klingersil C-4400


  • ● Reliably used in the hopper of foam molding machine and plastic machine. By increasing the area of fork body, the lowest measurable density is up to 0.008 g/cm3. It is particularly suitable for measurement of ultra-low-density and non-conductive medium, such as foam particles.

    ● Function works well in the hopper of cement packaging line. Fork-11, with thinner wing and larger separate space of the fork body, is particularly suitable to measure the level of powders and it can effectively prevent the accumulation of material on fork wing.

    ● Used to monitor the storage silo of salt.

    ● Used in rubber raw materials warehouse.



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