ENDRESS+HAUSER  FDR56-AA1AAAVEA1

Application

The Soliwave microwave barrier uses a contact-free procedure for detection. It can be installed in contai- ners, conduits, shafts or on free fall shafts. It is possible to take a measurement through non-metallic container materials from the outside.

Suitable as level limit switch for controlling and counting all types of bulk solids or piece goods (such as bags or boxes). Typical bulk solids include:

• Wood chips, wood dust or flour
• Plaster, cement, ash
• Paper or cardboard shred
• Gravel, sand
• Dried powders in general

The FQR56 emitter and FDR56 transceiver are compact transmitters with integrated power unit, and the transceiver has an additional integrated switching amplifier, which ena- bles easy electrical installation onsite.

The microwave barrier has an optional analog output (4 – 20 mA current output) for analysis of build-up, fouling etc. This allows, for example, the progress of fouling to be evaluated from "uncontaminated" to "contaminated" (the limits can be configured individually).

Your benefits

• Flush-mounted installation, non-contact installation possible
• Easy installation using R 11⁄2 or 11⁄2 NPT thread or suitable installation brackets
• Electronics housing can be rotated by 360°, allowing orientation into optimum position after installation
• Mechanical robustness
  • No wear
  • Process-wetted ceramic sensor diaphragm (optional)
  • Long service life
  • Maintenance-free
• Indication of the signal strength on the transceiver
• Adjustable sensitivity
• Direct connection of the supply voltage (emitter and transceiver separately or together)
• Mechanically compatible to FQR50/FDR50 microwave barrier, existing process connections can continue to be used; likewise, accessories such as adapter flanges, installation brackets and sight glasses can still be used.
• Conforms to ATEX, CSA and IECEx

Measuring principle

The FQR56 emitter puts out the microwave signal via an integrated horn antenna. The FDR56 transceiver directly opposite detects this signal and generates the selected output signal (relay, solid-state relay or 4 - 20 mA current output).

The range of the path is influenced by the different types of materials. The attenuation of the microwaves here depends on the electric characteristics of the attenuating material. Materials with the capacity to con- duct electricity, such as metals, reflect the waves, while other materials with lower conductivity only weaken them or are even penetrated. The attenuation of

The complete measuring system for limit detection consists of an FQR56 emitter and a FDR56 transceiver.