811-1005-E01 Datasheet, PDF (7/28 Pages) Magnetrol International, Inc. – Kotron® Model 811 RF Point Level Sensor

Figure 1
Recommended Horizontal Mounting
Figure 2
Recommended Mounting with Nozzle
Figure 3
Not Recommended
Figure 4
Recommended Horizontal Mounting
Guarded Probe
Figure 5
Recommended Horizontal Mounting
Guarded Probe
1.4.1 Horizontal Mounting
Alarm (narrow differential) applications only
Horizontally mounted probes provide a high degree of sen-
sitivity for use with non-conductive liquids as only approx-
imately 0.5 inches (12 mm) of level change is required to
completely cover (or uncover) the probe.
Horizontally mounted probes should be installed so that
the probe is parallel to and at the level at which the con-
trol point is desired. Refer to Figure 1.
Avoid any installation method in which the material may
become trapped in the mounting nozzle, thus preventing
the probe from signaling when the level recedes. Refer to
Figures 2 and 3.
NOTE: If nozzle mounting is unavoidable, the probe must be installed
with an inactive metal sheath having a length of at least 1 inch
(25 mm) greater than length of the nozzle. A sheath is required
to render the length of the probe within nozzle insensitive to
capacitance change. Refer to Figure 2.
Guarded Probe
Unit will signal at probe level. Refer to Figures 4 and 5.
NOTE: The guard element must be located outside of the nozzle.
Do not horizontally mount the unit in a nozzle deeper than
3 inches (75 mm). Refer to Figure 5. The medium may buildup
in the nozzle and cause false activation.
Alternate Horizontal Mounting
On applications involving viscous liquids or materials
which tend to cling or buildup, horizontally mounted
probes should be installed at a slight downward angle to
allow material to drain from probe rod. With this type
of installation, the packing gland face of probe assembly
should extend into the tank (or vessel). Refer to Figure 6.
1.4.2 Vertical Mounting
Vertically mounted probes provide the capability to adjust
the control point up or down a section of probe rod by
means of calibration adjustments within the unit.
Vertically mounted probes should be installed so that the
end of the probe rod is at least 2 inches (5 mm) below the
lowest desired level control point with conductive materi-
als or 4 inches (100 mm) below the lowest desired level
control point with non-conductive materials. Refer to
Figure 7 on page 5.
Figure 6
Alternate Horizontal Mounting
50-608 Kotron Model 811 RF Point Level Sensor
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