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Vibrating Fork
Compact Size

The Nivelco NIVOSWITCH RL series of vibrating fork level switches are robust instruments designed low and medium viscosity liquids. Mounted on tanks, it can control filling / emptying, or give fail-safe alarm signals.


The operation principle is based on that the electronic circuit excites the vibration in the fork probe. When the medium reaches and covers the fork, the  vibration stops, when the medium leaves the fork, it returns to vibrate freely. The electronics senses the change of vibration and gives output signal after a selected delay.


  • Most liquids with max 10,000 mm2/s viscosity
  • Corrosive, thick, turbulent, flowing liquids
  • Granular material and powder with min. 0.05 kg/dm3 bulk density

  • No moving parts
  • Self cleaning for most media
  • High immunity against vibrations
  • Stainless steel and ECTFE coated probes
  • Solid extension up to 3 meters
  • Various output configurations
  • Selectable density
  • High or low fail safe mode
  • Explosion proof models