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Rotonovio Rotating Paddle Switch

Rotonovio Rotating Paddle Switch

The ROTONIVO is an electromechanical Level limit switch and is used for level monitoring of bulk goods. The units can be delivered with a wide range of Ex-approvals for use in Hazardous Areas. They can be equipped for process over- and lowpressure and also for very high or low process temperatures.


  • Plastics
  • Cement and Aggregates
  • Food
  • Pulp and Paper
  • Chemical

Product: RN3

Principle of Operation

A measuring vane is driven by a synchronous motor. The bearing of the motor inside the housing allows it to swing. The motor is fixed to a switching lug.

If the vane is uncovered, a spring pulls the motor and switching lug to the left position (figure 1).

When material covers the vane and thus stops the rotation, the motor and switching lug swings to the right position (figure 2). The signal output indicates "covered" and the motor is stopped. When the vane becomes uncovered due to falling material, the spring pulls the motor and switching lug back to the left position. The motor is started and the signal output indicates "uncovered".



  • Suitable for most bulk solids.
  • Reliable, easy to operate and maintenance free measurement principle.
  • Unaffected by dust, electrostatic charging and caking.
  • International approvals for use in potentially explosive atmospheres (dust).
  • Compact, rotatable electronics housing for easy installation.
  • Channel or Flume
  • Basin
  • Shaft
  • Tank or Vessel

Housing: Aluminium IP 66 / NEMA Type 4

Pressure Range: -0.9 up to +10 bar (-13.1 up to +145 psi)

Process Connection: G 1", 1½" and 1¼";

NPT 1½" and 1¼";

M30x1,5 and M32x1,5;

various flanges available

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