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Home > Model 7xR Overfill Coaxial Guided Wave Radar Probe
 Model 7xR Overfill Coaxial Guided Wave Radar Probe   Printer Friendly Version
Choosing the proper Guided Wave Radar (GWR) probe is the most important decision in the application process. The probe configuration establishes fundamental performance characteristics. Coaxial, twin element (rod or cable) and single element (rod or cable) are the three basic configurations used today; each with specific strengths and weaknesses.

The coaxial probe is the most efficient of all probe configurations and should be the first consideration in all applications. Analogous to the efficiency of modern, coaxial cable, coaxial probes allow almost unimpeded movement of the high frequency pulses throughout its length.

The electromagnetic field that develops between the inner rod and outer tube is completely contained. The efficiency and sensitivity of a coaxial configuration yields robust signal strength even in extremely low dielectric (εr ≥ 1.4) applications.

The Model 7xR overfill probe is unique in the fact that is has no top transition zone, making it capable of reading to within specification all the way up to the process connection.

The model 7xR is available in two sizes. The standard is rated for vicosities up to 500cP and the enlarged version is rated to 2000cP.
Operating Principle Features Options Downloads
 
Guided Wave Radar is based upon the principle of TDR (Time Domain Reflectometry). Pulses of electromagnetic energy are transmitted down a probe. The pulse is reflected when it reaches an impedance change such as a liquid surface. The transit time is calculated and converted to level.

 

  • Temperatures to +400° F + (200° C)
  • Pressures to 70 bar (1000 psig)
  • Meets TÜV: WHG § 19 overfill specifications
   

  • NPT, BSP and flange connections
  • FM, CSA and ATEX approvals
  • NACE available
 
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  Special Fieldbus Instruction Manual