Level Sensors


Part No. NMR

Radar Sensors for Level Measurement

Radar sensor for continuous and contactless level measurement in liquids, pastes, sludges and bulk solids


For Challenging Applications

  • Latest FMCW radar technology with 63 GHz
  • Insensitive to gas, pressure, mists or temperature fluctuations
  • Compatible with all NivuMaster versions
  • Measures through plastic containers
  • Compact and easy to install
  • Robust and flood-proof IP68 housing
  • ATEX Approval for Zone 0/1 


The new R-Sensor is a radar sensor for continuous and contactless level measurement in liquids, pastes, sludges and bulk solids. 

Measurements are not affected by changing media, temperature fluctuations, gas ­overlays or vapours. The radar sensor utilises the latest 63 GHz FMCW technology which, compared to   pulsed radar methods, has several advantages:

  •  Improved spatial allocation 
  •  Larger dynamic range
  •  More reliable surface detection   

Therefore, it is very easy to retrofit existing equipment setups after updating the firmware.

R-Series sensors provide accurate measurement values in closed tanks or outdoor applications (e. g. dams, rivers etc.). 

A very low dead zone and the narrow 
beam angle allow for reliable measurements even in confined spaces. 


Technical Data

The firmware of the following NivuMaster units can be updated: NivuMaster as of version 7.50, NivuMaster L-2 as of version 2.10

Cable extention

3-wire shielded (e.g. 3 x 0.75 mm shielded)

Radio approval

EN302-729:2016 (Level Probing Radar)

Connection thread


Housing Material

Valox 357U


130 x 90 mm


1,1 kg

Power supply

28 V DC max.

Power consumption

0,6 W typical

Outside cable diameter

8,1 mm

Cable types

3 x 0,5 mm shielded

Cable lengths

5/10/20/30/50/100 m

Operating temperature

- 40 °C … + 80 °C


IP68 / NEMA 6P

Measurement uncertainty

± 2 mm

Measurement range

R8/R8z: 0,077 - 8 m

R16/R16z: 0,077 - 16 m

Measurement frequency
Measurement principle

FMCW Radar

Specifications subject to change.


Data Sheet R-Series

Radar sensor for continuous and contactless level measurement in liquids, pastes, sludges and bulk solids.

Technical and Installation Instruction for R-Series Sensors

Declaration of Conformity R-Series Ex

Contactless level measurement with radar technology within Ex areas

Declaration of Conformity R-Series

Contactless level measurement with radar technology

EU Type Examination Certificate "NIVUS R-8 & NIVUS R-16"

EU Type Examination Certificate "NIVUS R-8z & NIVUS R-16z"

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