Page 4 SLG 700 SmartLine Level Transmitter User’s Manual Revision 8
Probe
The purpose of a Guided Wave Radar probe is to guide radar pulses produced by the radar
transmitter towards the material being measured. It also guides the reflected pulse back to the
transmitter for processing into a level measurement. The probe can be made of a single
conductor such as for single wire or rod probes, or two conductors for coaxial probes. For rigid
probes (rod and coaxial), multiple segments, each up to 2m long, can be connected.
The probe is also known in the industry as “waveguide”.
A single wire probe is the most common design; other designs are provided based on
application needs. For the purposes of this document the term “Wire” is being used, however
the term “Wire” and “Rope” are interchangeable.
Table 2-3 summarizes advantages and disadvantages of different probe constructions.
Installation details of each probe are described in Chapter 3.
Table 2-3: Probe Selection
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