The Nivobob series of plumb bob sensors is used for continuous level measurement within bulk storage silos and for interface measurement.

The simple electromechanical measurement principle is a truly reliable all-rounder in most bulk materials.

The sensor weight, made of a suitable material, attached to either a tape or rope is electromechanically lowered from the top into the vessel. Once the sensor weight rests on the material, the winding direction of the motor changes and the sensor weight is rewound to the upper stop position.  

For interface measurements, the sensor weight can be adjusted according to the density of the sediment. The distance is electronically measured and together with the programmed silo geometry information the microprocessors convert this distance into a volumetric output signal. The Nivobob generates an analog 4-20 mA signal and a Modbus RTU or Profibus DP interface for the evaluation systems.

As the system is immune to dust, dielectricity, conductivity, humidity and caking, the Nivobob always delivers a reliable level signal.

• Variety of sensing weights to suit any application.
• Insensitive to dust, material changes, humidity, adhesion, temperature fluctuation, etc.
• Simple installation and commissioning.
• High measurement accuracy even at long range.
• International approvals - suitable for use within hazardous areas.
• Long service life (up to 225,000 measurements) ensure low maintenance costs.
• Various threaded and flanged connections available.
• Also available with DC power supply.
• Process temperatures up to 250°C.