Microwave barrier
- Measuring principle

The microwave barrier comprises a FQR57 transmitter, a FDR57 transceiver and a process transmitter with control unit FTR525. The device works contact-free based on a microwaves in a frequency range of 24.05 to 24.25 GHz ISM.

• Limit: The transmitter FQR57 emits a focused high-frequency beam, which is attenuated by an obstruction. The complete or partial attenuation of the beam is detected by the transceiver FDR57 which forwards the received signal strength to the process transmitter with control unit FTR525.
  
  
• Flow: The transceiver FDR57 is also a flow indicator and emits microwaves too, which are reflected by the bulk solids. The instrument measures the strength of the reflected frequency shifted energy (Doppler effect) and detects, whether the bulk solids are in motion or not.
  
  
Damping example:


Material	Damping
Air	No
Bulk solids with lower DF*	Low
Bulk solids with higher DF*	High
Metal	Full


*dissipation factor

• The measuring principle is independent of:
  • Temperature and pressure in containers
  • Aggressive and abrasive media
  • Dust, steam, mist, smoke and sediment deposits or build-up
  • Airflow, air layers of different temperature

• Non-contact measurement procedure, therefore no wear and no maintenance required
• It is possible to take a measurement through non-metallic container materials directly from the outside

If you have any questions about our microwave barrier FQR57 / FDR57 with FTR525, please contact:

Michael Kuhrig (Graduate engineer FH)

P +49 2102 955-715
F +49 2102 955-720
E michael.kuhrig(at)kirchgaesser.com
B Business card (vcf)

Hanno Kirchgaesser (Graduate engineer)

P +49 2102 955-6
F +49 2102 955-720
E hanno.kirchgaesser(at)kirchgaesser.com
B Business card (vcf)