Electronic level sensor
LR7009
7
Coaxial pipes with ¾“ NPT process connection
Length (cm)
Order number
45
E43218
70
E43219
100
E43220
120
E43223
140
E43224
160
E43221
Flange plates
Size / process connection
Order number
73 - 90 / G¾
E43201
65 - 80 / G¾
E43202
3.2 Operation with single probe
The single probe is made up of one individual rod and is suited for the detection of aqueous media, in
particular of heavily soiled aqueous media.
For the correct function with single probe, the device 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. Only
use accessories indicated as "launching plate".
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.
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.
3.3 Operation with coaxial probe
The coaxial probe is made up of an inner rod and an outer probe pipe (coaxial pipe). The rod is
centred 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.
3.4 Application area
•
Water, water-based media
•
Oils, oil-based media (only for operation with coaxial probe)
Application examples:
•
Detection of coolant emulsion in a machine tool.
•
Detection of cleaning liquid in a parts cleaning system.
•
Monitoring of hydraulic oil in a hydraulic power unit (only for operation with coaxial probe).
