822-1002-C01 Datasheet, PDF (6/40 Pages) Magnetrol International, Inc. – Kotron® Sentinel Models 822, 832 and 842

1.4 Mounting
The Model 822, 832 or 842 switch can be mounted to
a tank using a variety of process connections. Generally,
either a threaded or flanged connection is used. For infor-
mation about the sizes and types of connections available,
see Probe Brochure 50-125.
Make sure all mounting connections are properly in place
on the tank before installing the probe. Make sure the
Kotron probe is correct for the intended installation.
It is common practice to use the metal tank wall as the
reference electrode. In such cases, it is required that the
probe housing makes a good electrical connection to the
tank wall. If there is any doubt about this connection or
to the use of PTFE thread tape gaskets, paint, rust, or any
other reason, a separate strap should be installed between
the probe housing and the tank.
Caution: This unit contains CMOS electronics which may be
damaged by static electricity. Do not touch any semi-
conductor devices unless you are properly grounded.
Caution: When a probe is used in an abrasive medium, inspect the
probe periodically for visible surface wear. If damage to
the probe insulation is found, replace the probe.
Metal Walled Tanks
On water-based liquids, there should be no problem with
sensitivity or linearity. With non-conductive, low dielectric
media, sensitivity can be enhanced by locating the probe
close to and parallel with the tank wall. If this is not prac-
tical, a ground reference probe may be the solution.
Non-Metallic and Glass-Lined Tanks
With plastic, concrete, wood, or any other non-conductive
walled vessels a ground reference is required. Most com-
monly, this electrode will be in the form of a concentric
ground tube (i.e., stilling well). In questionable circum-
stances, consult the factory. In all cases, a good electrical
connection must be made between the ground surface and
the probe housing.
Switch/Probe Assembly
Switches with probes up to and including 12 inches
(300 mm) in length are shipped pre-assembled. All other
switches are shipped unassembled to avoid damage during
transit. These transmitters must be assembled prior to
mounting. Choose your particular configuration from the
following sections and follow the instructions carefully.
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50-621 Kotron Sentinel Models 822, 832 and 842 RF Point Level Switches