300-R010-45L Datasheet, PDF (3/12 Pages) Magnetrol International, Inc. – Echotel® Model 300/301 Ultrasonic Non-Contact Transmitter For Level, Volume, and Open Channel Flow

TYPICAL MOUNTING CONFIGURATIONS
Figure 3 shows how the transducer can often be mounted
further down in a wet well or sump if the liquid will
never reach the top of the vessel. This helps to keep the
12 degree ultrasonic beam away from pumps, ladders,
side walls, or other obstructions in the vessel.
Figure 3
Typical Transducer Mounting - Wet Well or Sump
ULTRASONIC BEAM ANGLE
A 12° conical beam of ultrasonic energy is emitted from
the face of the transducer. The transducer should be
mounted in a location such that the ultrasonic signal does
not touch the side walls or any other obstructions in the
vessel. This is typically accomplished by using a bracket,
half-coupling, or rigid conduit to mount the transducer in
a spot where a strong echo can be received off of the
liquid surface. The chart below shows the distance the
transducer should be located away from side walls and
obstructions. The distances are based on a 6° beam radius
at different heights above the liquid surface. Generally
speaking, the transducer should be mounted one foot
away for every 10 feet of height.
Distance from
Transducer Face (feet)
3'
6'
9'
12'
15'
18'
21'
24'
27'
30'
33'
12° Beam
Diameter (feet)
0.6'
1.3'
1.9'
2.5'
3.2'
3.8'
4.4'
5.0'
5.7'
6.3'
6.9'
Minimum Distance from
Wall or Obstruction (inches)
4"
8"
11"
15"
19"
23"
26"
30"
34"
38"
42"
3