SOR Single Point Ultrasonic Level Switch - Manual (Page 2)

2/16 Form 841 (08.13) ©SOR Inc.
Housing Hub
Alignment mark X
on wrench flat
at 12 o’clock
Alternate
position for
alignment
mark X at
6 o’clock
1 inch
minimum
Sensor Cavity
TOP VIEW
DO NOT weld any part of this instrument.
Wrench Flat
Housing
Hub
Apply
thread sealant
No
Obstructions
Horizontal Mounting
Horizontal mounting is recommended for use
in highly viscous liquids, or liquids containing
sludge and debris. When tightened securely, the
sensor cavity must be perpendicular to the liquid
surface for optimum drainage when process
liquid level drops below the sensor cavity.
Tank or Vessel
Make sure that the sensor can be fully inserted and tightened without interference from
obstructions inside the tank or vessel. (See
). The sensor cavity must clear the inner
wall by one inch/25.4 mm. (See )
Apply suitable sealant to the process connection to prevent process leakage. (See )
Use an open end wrench to tighten the sensor into the process connection.
Do not use the sensor base as a handle to tighten the process connection.
An alignment mark X stamped on a
wrench flat (or on the dry face of a
flange below the housing) shows
sensor cavity orientation. (See
)
Optimum drainage occurs when the X
mark is located at 6 or 12 o’clock. The
sensor must project through a tank
fitting so that the sensor cavity is at
least 1” beyond the inner wall of the
tank. (See
y
)
Installation
Ultrasonic Level Sensors can be mounted by inserting the sensor through a fitting in a
vessel, or the sensor may be suspended over an open sump or basin.
Keep the sensor cavity out of the direct flow of liquid fill to prevent false readings. Install a
baffle to divert liquid flow if necessary.
Avoid installation of sensor in turbulent areas such as pump discharge or suction. Air
pockets may be present in these areas which may cause false indication.