Beam Angle - Endress+Hauser Micropilot FMR60B Technical Information

Micropilot FMR60B HART

Beam angle

Endress+Hauser
Maximum nozzle length H
max
øD
In the case of longer nozzles, reduced measuring performance must be expected.
Please note the following:
• The end of the nozzle must be smooth and free from burrs.
• The edge of the nozzle should be rounded.
• Mapping must be performed.
• Please contact the manufacturer' s support department for applications with nozzles that are
higher than indicated in the table.
The beam angle is defined as the angle α where the energy density of the radar waves reaches half
the value of the maximum energy density (3 dB width). Microwaves are also emitted outside the
signal beam and can be reflected off interfering installations.
 7 Relationship between beam angle α, distance D and beamwidth diameter W
The beamwidth diameter W depends on the beam angle α and the distance D.
Encapsulated antenna, PVDF 40 mm / 1-1/2", α = 8 °
W = D × 0.14
α
W
as a function of the nozzle diameter D
ØD
40 to 50 mm (1.6 to 2 in)
50 to 80 mm (2 to 3.2 in)
80 to 100 mm (3.2 to 4 in)
100 to 150 mm (4 to 6 in)
≥150 mm (6 in)
W 2
=
α
W
D
5 m (16 ft)
10 m (33 ft)
15 m (49 ft)
20 m (66 ft)
22 m (72.18 ft)
H
max
400 mm (16 in)
550 mm (22 in)
850 mm (34 in)
1 050 mm (42 in)
1 600 mm (64 in)
α
D tan _
. .
2
W
0.70 m (2.29 ft)
1.40 m (4.58 ft)
2.09 m (6.87 ft)
2.79 m (9.16 ft)
3.08 m (10.10 ft)
A0031824
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