8
5 Function
5.1 Measuring principle
The sensor determines the level according to the capacitive measuring principle:
• An electrical field (E) is generated
and influenced by the medium to be
detected. This change to the field
causes a measurement signal that
is electronically evaluated.
• The dielectric constant of a medium
is important for its detection. Media
with a high dielectric constant
(e.g. water) generate a strong
measurement signal, media with a
low dielectric constant (e.g. oils) a
correspondingly lower signal.
• The active measurement zone of
the sensor probe is composed of
16 capacitive measuring segments.
They generate measurement
signals depending on the degree of
coverage.
Fig. 5-1
A
I
I
E
I: Inactive zone
A: Active zone (16 active segments)
E: Electrical field
Dimensions → Technical data sheet
5.2 Operating principle / features of the unit
The unit can be installed in tanks of different sizes.
2 outputs are available. They can be set separately.
OUT1
Switching signal for level limit value / IO-Link
OUT2
Switching signal for level limit value
To adjust the unit to the application, choose the required operating modes.