6
4.1 Operation with single probe
The single probe is made up of one individual rod� Operation with single probe is
suited for the detection of aqueous media, in particular of heavily soiled aqueous
media�
For the correct function with single probe, the unit needs a large enough
metal launching plate� It is necessary for transferring the microwave pulse
to the tank with optimum transmission power�
The flange plates that are available as accessories are not sufficient as
launching plates (for suitable launching plates → 6.4).
For installation in closed metal tanks, the tank lid serves as a launching
plate� For installation in open metal tanks, tanks made of plastic or metal
tanks with plastic lids, a sufficiently large fixing plate, a metal plate or
similar must be used (→ 6.4.3 / → 6.4.4).
For operation with single probe, minimum distances to tank walls, objects
in the tank, bottom of the tank and further level sensors must be adhered
to (→ 6.1.1).
4.2 Operation with coaxial probe
The coaxial probe is made up of an inner rod and an outer probe pipe (coaxial
pipe)� The rod is centered in the coaxial pipe by one or several spacers�
In case of operation with a coaxial probe, media with a low dielectric constant (e�g�
oil and oil-based media) are detected in addition to aqueous media�
No launching plate is required for operation with coaxial probe�
Furthermore, no minimum distances to tank walls and objects in the tank
are required�
4.3 Applications
• Water, water-based media
• Oils, oil-based media (only for operation with coaxial probe)
• For applications under difficult environmental conditions (e�g� weather)
(→ Technical data sheet).
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