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24
MN301905 Rev A
Install Sensor (continued)
Step Three
BEAM ANGLE
The emitted microwave pulse will expand along its specified beam angle for the entire height of the tank.
Place the sensor so that objects will not interfere with the beam path underneath the sensor. The beam angle
is a function of the sensor Series and antenna length (where variable). Verify the beam angle specification of
your sensor and reference the below charts to determine the amount of free measurement space required
under the installed sensor.
Beam
Angle
4°
5°
6°
8°
12°
Height
Diameter
10’
0.70’
0.87’
1.05’
1.40’
2.10’
20’
1.40’
1.75’
2.10’
2.80’
4.20’
30’
2.10’
2.62’
3.14’
4.20’
6.31’
40’
2.79’
3.49’
4.19’
5.59’
8.41’
50’
3.49’
4.37’
5.24’
6.99’
10.51’
60’
4.19’
5.24’
6.29’
8.39’
12.61’
70’
4.89’
6.11’
7.34’
9.79’
14.71’
80’
5.59’
6.99’
8.39’
11.19’
16.82’
90’
6.29’
7.86’
9.43’
12.59’
18.92’
100’
6.98’
8.73’
10.48’
13.99’
21.02’
LR36
Beam
Angle
4°
5°
6°
8°
12°
Height
Diameter
5m
0.35m
0.44m
0.52m
0.70m
1.05m
10m
0.70m
0.87m
1.05m
1.40m
2.10m
15m
1.05m
1.31m
1.57m
2.10m
3.15m
20m
1.40m
1.75m
2.10m
2.38m
4.20m
25m
1.75m
2.18m
2.62m
3.50m
5.26m
30m
2.10m
2.62m
3.14m
4.20m
6.31m
AVOID CONDENSATION IN THE CONDUIT
You can give your instrument additional protection against moisture
penetration by leading the conduit connection or cable downward in front
of the cable entry. Condensation in the conduit will therefore not enter
the sensor’s enclosure.
