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The devices of the MOLOSwave series for continuous level measurement are working with the Time Domain Reflectometry (TDR) measurement principle. They are specifically designed for the use in bulk goods. During the measurement high frequency microwave pulses with low energy are coupled onto the probe and guided along this probe to the bulk goods. The product surface partly reflects these pulses. The electronic detects the reflected pulses and calculates the actual filling level from the time difference of the transmitted and received signals. These filling levels are made available as a 4-20 mA signal for further signal processing. This signal can be visualized with easy to use and well legible indicating units that are mounted in a switch cabinet.


Product features

  • Use in dust explosive areas with ATEX zone 20/21 possible
  • Measuring range MWF 21 with rod probe up to 3 m
  • Measuring range MWF 27 with cable probe up to 20 m
  • High measurement accuracy
  • Highest level of functional safety through the use of 4- wire technology
  • Independent of bulk solids features
  • Insensitive against dust, buildup and condensation
  • Very good price-performance-ratio
  • Wear and maintenance-free operation
  • High tolerance of interfering signals
  • Different probes available
  • Different process connections (threads, flanges, Tri-Clamp, …)
  • Housing made of Aluminium or stainless steel


Further information on ATEX

Supply voltage
12 … 30 V DC
input non-polar
Measuring range
1,0 … 20,0 m
0,1 … 3,0 m
Signal output
4 … 20 mA
0 … 100 %
NC or NO optinal
Process temperature
-20 °C … +150 °C
Dielectric constant
DK-value > 1.8
Ambient temperature
-20 °C … +70 °C
Process pressure
-1 bar … 40 bar
Process connection
Threads, flanges, clamp, …
Aluminium or stainless steel
Maximum tensile load
10 kN
Housing IP66
Aluminium or stainless steel
Stainless steel 1.4401
Stainless steel 1.4571
Mounting position
vertical from the top
Technical data


The MWF is a guided radar measuring instrument for continuous level measurement in all kind of bulk solids with a DC-value (dielectric constant) above 1.8. This sensor reliably and accurately measures the actual filling level in silos and bins at any time with a measuring range up to 20 m. Therefore this level measurement device is used in many different industries: