VF7 Guided Wave Radar

TDR gauge, level measurement for liquids & solids

The Reflex VF range of TDR microwave level control transmitters is ideal for the measurement of liquids, powders and granules up to a range of 35 m. The unit is unaffected by pressure, temperature, viscosity, vacuum, foam, dust, changes in dielectric constant or coating of the probe. The VF Series can measure virtually any product in either Direct or TBF mode, utilising any one of the seven available probe types.

Pulses of low power microwaves are sent along a conductor, at the point where the waves meet the product surface, they are reflected back. The intensity of the reflection depends on the dielectric constant of the product. The higher the dielectric constant, the stronger the reflection will be, e.g. up to 80% for water.

The instrument measures the time between emission and reception of the microwave signal which is proportional to the distance. TDR guided wave radar can be used in two different modes for level measurement or interface measurement of two different liquids.

The VF7 can measure product with a dielectric rating as low as 1.1 and can provide an accuracy of ±3 mm on liquids as standard. It is suitable for high-pressure applications up to 300 bar and can measure the interface between liquids such as oil and water.

Product Highlights

  • Universal technology for liquids/solids 

  • 1/2” BSP process connections

  • Unaffected by dust during fill 

  • Immune to pressure, foam & dust

  • Corrosion & chemical resistant 

  • Capable of measuring 1.1 interface 

  • High-pressure options to 300 bar

  • Safety integrity level SIL1 

Technical Data

  • Measuring Range: 0 - 35m
  • Accuracy: +/- 2mm
  • Maximum Temperature: 300ÂșC
  • ATEX option: Yes