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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.
  • Cape-11P Guard RF Admittance Level Switch is assembled with a stainless-steel protective sleeve on the basis of standard model to withstand the impact of heavy materials. Cape-11P is aimed to measure the level of fly ash, solid granules and adhesive materials. The design of electronic circuit can eliminate measurement error caused by material buildup or fouling on the probe and the inner wall of vessel, and effectively improve measurement accuracy and reliability. It is especially suitable for level control for dust collector and ash bunker at coal power station.


  • 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.


  •  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.

  • Medium

    Medium type

    Heavy solid powder, granules, adhesive materials

    Dielectric constant

    ≥1.6

    Probe data

    Probe length

    7502000mm

    Shield length

    90mm/240mm/300mm /590mm, or customize

    Protective sleeve length

    For probe length 7501200mm210mm/370mm

    For probe length1200mm : customize

    Probe diameter

    Φ10mm

    Materials

    External Housing

    Aluminum alloy

    Inner housing

    Plastic

    Probe metallic parts

    SUS304

    Probe insulation

    PTFE

    Protective sleeve

    SUS304

    Power supply

    AC

    85264V AC

    DC

    1830V DC

    Power consumption

    ≤3W

    Switch delay

    When immersed

    1s

    When laid bare

    1s

    Signal output

    Relay

    DPDT, 8A/250V AC/30V DC

    Delay

    030s continuous adjustable.

    Operating conditions

    Process temperature

    -40250

    Ambient temperature

    -4070

    Storage and transport temperature

    -4080

    Approvals

    Protection rating

    IP66

  •  Ash hopper in ash conveying system at coal-fired power plant.

    Cape-11P is assembled with a stainless-steel protective sleeve, can effectively protect the instrument from impact damage.

     Alumina powder silo at smelting plant and pre-chamber in CDQ (Coke Dry Quenching) unit at steel plant.

     Raw meal silo and cement silo at cement plant.



  • Cape-11P Guard RF Admittance Level Switch


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