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RF Admittance Level Switch

Cape-11 RF Admittance Level Switch is a level measurement instrument mainly designed for powdery coal ashes, solid granules and adhesive materials. It possesses merits and benefits of other similar products in the market. Besides, Jiwei has developed innovative techniques and manufactured technologies to make Cape-11 more competitive and has higher reliability as well as stronger flexibility.


In Cape-11 RF Admittance Level Switch series products, a probe is designed to detect the change of capacitance and impedance between probe and vessel wall to fulfill material level measurement and control. In its electronic unit, reactance between measurement electrode and the wall of an empty vessel constitute a balanced bridge circuit which outputs a stable oscillation signal. As medium level rises, measured medium covers measurement electrode, reactance between electrode and the wall of vessel changes. It causes imbalance of bridge circuit and stops the oscillation as a result. A post-circuit is designed to detect the change of output signal from bridge circuit and generate an alarm signal. In addition, oscillation signal at radio frequency is not only applied to the measurement electrode but also applied to a shield pole through a 1: 1 voltage-follower, so measurement electrode and shield pole have the same electric potential, phase, and frequency, but these two electrodes are insulated from each other. Even if there is medium buildup on probe, because there is no electric potential difference between measurement electrode and shield pole, and the reactance change on shield pole has no effect on the detection of post-circuit. Therefore, only reactance change on measurement electrode induced by the filled medium between measurement electrode and the wall of vessel will be detected by post-circuit. It eliminates the effect of medium buildup on level measurement.


Jiwei has developed innovative techniques, focused on details of manufacturing process, introduced strict product process management and quality inspection to ensure Cape-11 works in super high reliability. 

Compared with other similar products in the market, Cape-11 series products have the following advantages: 
  Strong flexibility, widely used for the level measurement of fly ash, solid granules and adhesive materials.
  With dual color LED indicator, the housing with electronics can be rotated during installation to make the orientation of LED easy for long distance observation.
  Modular design for high reliability, easy installation and maintenance.
  Strong impact resistance with a stainless-steel protective sleeve assembled.
  Industry leading design for high temperature endurance, process temperature can be up to 450℃.

Cape-11 RF Admittance Level Switch series include 4 models (Standard, Guard, Rope and Ultra-high Temperature):

Cape-11A Standard: Suitable for level measurement of dust and coal ash etc., flexible and easy for installation and maintenance.

Cape-11P Guard: A stainless steel protective sleeve assembled on standard Cape-11 to enhance impact resistance of instrument for heavy materials.

Cape-11R Rope: Suitable for large silos or bunkers, install vertically to effectively avoid material impact from side.

Cape-11H Ultra-high Temperature: An advanced product in the field. The probe is made of high temperature ceramic, can tolerate high process temperature up to 450℃.
  • Cape-11A Standard RF Admittance Level Switch
    Cape-11A Standard RF Admittance Level Switch
     Excellent flexibility, widely used for the level measurement of fly ash, solid granules and adhesive materials.
     With an external dual color LED indicator and housing with electronics can be rotated during installation to make the orientation of LED indicator convenient for long distance observation.
     Modular design for high reliability, easy installation and maintenance.
     Passed third party reliability tests and received certifications from the third party, guaranteed extreme high reliability.
     Inexpensive with super quality, high cost-effective ratio. 
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  • Cape-11P Guard RF Admittance Level Switch
    Cape-11P Guard RF Admittance Level Switch
     Assembled with a stainless-steel protective sleeve, strong impact resistance.
     Widely used in level measurement for coal fly ash, solid granules and adhesive materials, particularly suitable for level control of fly ashes in dust collector and ash bunker at power station.
     With an external dual color LED indicator and housing with electronics can be rotated during installation to make orientation of the LED convenient for long distance observation.
     Modular design for high reliability, easy installation and maintenance.
     Passed third party reliability tests and received certifications from the third party, guaranteed extremely high reliability.
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  • Cape-11R Rope RF Admittance Level Switch
    Cape-11R Rope RF Admittance Level Switch

     Suitable for larger tanks and silos level measurement.
     With an external dual color LED indicator and the housing with electronics can be rotated during installation to make orientation of LED convenient for long distance observation.
     Modular design for high reliability, easy installation and maintenance.
     Passed third party reliability tests and received certifications from the third party, extremely high reliability guaranteed.

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  • Cape-11H Ultra-high Temperature RF Admittance Level Switch
    Cape-11H Ultra-high Temperature RF Admittance Level Switch

      Ceramic probe, process temperature can be tolerated up to 450℃.
      With an external dual color LED indicator and the housing with electronics can be rotated during installation to make the orientation of LED convenient for long distance observation.
      Modular design for high reliability, easy installation and maintenance.

      Passed third party reliability tests and received certifications from the third party, extremely high reliability guaranteed.


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