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Vibrating Level Switch

Vibrating level switch is based on a cantilever beam vibrating principle. A cylindrical rod or a fork is used as a vibrating probe. Piezoelectric devices are utilized to drive and detect the vibration. With state-of-the-art techniques, the specifications of our vibrating level switch and its reliability reach to an advanced level in the field. When vibrating probe comes in contact with measured material, vibrating amplitude and frequency of the probe will substantially decrease, so does the output of detecting piezoelectric device. The amount of decrease is analyzed by an intelligent circuit which outputs a switching signal as a result. Depending on the chemical and physical properties of measured medium, a series of vibrating level switches can be chosen.


Jiwei has been granted 3 invention patents and 2 utility patents on its vibrating level switches so far. One more invention patent is under checking and verification. Compared with similar products in the market, Jiwei vibrating level switches have following advantages:


  Broader range of medium density, can be used for powder particles with extreme low density as 0.008g/cm³, and liquid density as low as 0.5 g/cm³.

  Excellent adaptability, particularly suits for medium with unstable humidity and dielectric constant.

  Larger redundancy for medium buildup thanks to the precisely pre-adjusted resonance, highly reliable for the medium with higher viscosity and adhesiveness.

  High reliability because of higher quality chips purchasing, detail-oriented design, and strict production flow and quality control.

  An industry-leading product for high process temperature applications, excellent performance under temperature up to 250℃, or ultra-high temperature up to 400℃ with water/air cooling.

  Smaller probe, particularly suitable for pipelines.

  Vibrating probe is made of strong corrosion resistant materials, such as 316L.

  With CE certificates, gas/dust Flameproof Enclosure and gas/dust Intrinsic Safety certificates, and IP66/IP67 Ingress Protection.

  Strong self-diagnostic function makes it possible to accurately locatethe faults.


Our vibrating level switch has 4 series of products to meet requirements of various applications:

Tube-11 Vibrating Rod Level Switch: This innovative vibrating rod level switch is designed with double vibrating tubes, which is a first made-in-China model. It suits for the majority level switch applications for granular and powdery bulk solids. The lowest medium density can be as low as 0.02g/cm³.

Fork-11 Tuning Fork Level switch: The area of fork body has been reasonably increased for higher sensitivity. It is particularly suitable for powder and fine-granule with the density as low as of 0.008g/cm³.

Ring-11 Liquid Level SwitchWith only 40mm length of the fork body, it is particularly designed to measure the liquid level in vessels, storage tanks, other process tanks, as well as bypass pipelines. The density of the liquid can be as low as 0.5 g/cm³.

Ring-21 Compact Liquid level switch: It is compact, lightweight, easy to carry and inexpensive. It is mainly aimed for the applications that are cost sensitive and no explosion protection requirement. It is particularly suitable for pipelines or other applications with constricted space.

  • Tube-11 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.


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  • Ring-11 Liquid Level Switch
    Ring-11 Liquid Level Switch

    Passed SIL2 / SIL3 Functional Safety Assessment, certified for both Intrinsic Safety and Flameproof Enclosure explosion protection. With only 40mm fork length, the lowest measurable medium density can be as low as 0.5g/cm³. Process temperature can reach up to 250℃. Typical applications:

     Liquefied natural gas (LNG) with the density of 0.56g/cm³ in transport pipelines.
     Pipelines in pump protection system.

     Herbicides and fungicides in insecticide Factory.

     Storage tanks of oil, crude oil, gasoline and lubricating oil.


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  • Fork-11 Tuning Fork Level Switch
    Fork-11 Tuning Fork Level Switch


     Reasonable design of tines and precisely adjusted of fork resonant frequency. The lowest measurable density can be as low as 0.008g/cm³.

     Particularly suits for level measurement of powdery, fine-grained bulk solids, can effectively avoid material buildup.

     Industry-leading performance for high temperature working environment, can tolerate process temperature up to 250℃.

     With CE certificates, gas and dust Flameproof Enclosure and Intrinsic Safety certificates.

     Made of strong corrosion resistant material 316L.


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  • Ring-21 Compact Liquid Level Switch
    Ring-21 Compact Liquid Level Switch

     Compact and portable, with overall length 160.5mm, maximum diameter 31.5mm and the fork body only 38mm long.

     Particularly suitable for pipelines and other applications within constricted space.

     With CE certificates. Economical, practical and high cost-effective ratio.

     Strong disturbance resistant ability, not influenced by foam, bubbles, viscosity, vibration and other liquid characteristics.

     Highly reliable because of detecting changed of vibrating frequency of the fork.

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