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
Measurement principle FMCW Radar
Measurement range R8/R8z: 0,077 - 8 m
R16/R16z: 0,077 - 16 m
Measurement uncertainty ± 2 mm
Protection IP68 / NEMA 6P
Radio approval EN302-729:2016 (Level Probing Radar)
Operating temperature - 40 °C … + 80 °C
Cable lengths 5/10/20/30/50/100 m
Cable types 3 x 0,5 mm shielded
Outside cable diameter 8,1 mm
Cable extention 3-wire shielded (e.g. 3 x 0.75 mm shielded)
Power consumption 0,6 W typical
Power supply 28 V DC max.
Weight 1,1 kg
Dimensions 130 x 90 mm
Housing Material Valox 357U
Connection thread 1“ BSP/NPT
Compatibility The firmware of the following NivuMaster units can be updated: NivuMaster as of version 7.50, NivuMaster L-2 as of version 2.10

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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