Nico 120 Level Measurement

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The Nico 120 radar sensor has been designed to continuously measure the level of dust, powders or granules in storage vessels. It can be used on a wide range of different materials having varying particle sizes and compositions. The measurement is unaffected by dusty atmospheres, obstructions or temperature variations.

The Nico 120 measuring range is 120 metres. The good signal focus ensures that vessel fittings and encrustations on the walls does not affect the measurement.


Extremely short microwave pulses are transmitted via the antenna system, to the material to be measured, the pulses are reflected by the surface of the material, and received back to the antenna system.

The time taken between the transmission of the pulses and receiving the pulses, is proportional to the level in the vessel. Thanks to the very good signal focusing a simple setup and reliable measurement is ensured.

Because the pulses are travelling so fast, and difficult to process, a procedure is adopted to allow for the processing of the pulses. The pulses are transmitted in the K-band frequency range, where its usage is time proven.

The transmitted power is well below the IEC specifications. There is no need to calibrate the vessel whether empty or full.


Level Measurement in Storage Silos

Hydrated lime or activated carbon chemical reagents are stored in silos ready for flue gas cleaning. These bulk materials are delivered to the process by feeding into a pneumatic blow line.

For optimum process control, reliable level measurement is essential to ensure that adequate quantities of reagent are readily available.

These kind of bulk chemical might be sticky and difficult to handle. Extreme dust generation and product build-up are the challenges.

That’s why an advanced and reliable contactless level sensor complies with the requirements in this application.


  • Reliable measurement under all operating conditions
  • Optimal control of storage product
  • Wear and maintenance-free

Where is the Nico 120 Fitted?

Measurements with flange installation

The Nico 120 is supplied with a DN 80 flange, which is installed on the vessel using an identical flange.

Measurements using the pivot-mounted bracket

If it is not possible to install the sensor in the centre of the silo, it can be directed towards the centre using an optional pivot-mounted bracket. The illustration below provides a simple overview of how to determine the required angle.

Measurements with installation arm

The installation arm allows the sensors to be installed easily on the silo wall or roof. This is a very simple and effective method to direct the sensor towards the surface of the bulk goods, particularly for open silos.

Technical Data

Measuring range – Distance 120 m
Process temperature -40 … 200 °C
Process pressure -1 … 20 bar
Accuracy ± 5 mm / ± 0.2“
Version with plastic horn antenna ø 80 mm
Metal jacketed lens antenna
Materials, wetted parts 316L
Threaded connection  G1½, 1½ NPT
Flange connection ≥ DN80, ≥ 3“
Seal material EPDM
Housing material Plastic
Stainless steel (precision casting)
Stainless steel (electropolished)
Protection rating IP 66/IP 68 (0,2 bar)
IP 66/IP 67
IP 66/IP 68 (1 bar)
Output Profibus PA
Foundation Fieldbus
4 … 20 mA/HART – two-wire
4 … 20 mA/HART – four-wire
Ambient temperature -40 … 80 °C

Additional Information

Weight 3.8 kg

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