Emerson Rosemount 5408 Reference Manual page 24

Mechanical installation
June 2019
Figure 3-5: Beam Angle and Beam Width
Table 3-3: Beam Angle
Antenna size
2-in. (DN50) cone/process seal
3-in. (DN80) cone/process seal
4-in. (DN100) cone/process seal
8-in. (DN200) parabolic
Table 3-4: Beam Width, ft. (m)
Distance (D)
16 (5)
33 (10)
49 (15)
66 (20)
82 (25)
98 (30)
131 (40)
3.3.7 Nozzle requirements
In order to allow the microwaves to propagate undisturbed, the nozzle dimensions should
be kept within the specified limits as given in
24
2-in. cone/ process 3-in. cone/ process
seal
5.2 (1.6)
10.4 (3.2)
15.6 (4.8)
20.8 (6.3)
26.0 (7.9)
31.2 (9.5)
41.6 (12.7)
Beam angle (α)
18°
14°
10°
4.5°
Beam width (W)
4-in. cone/ process
seal seal
4.0 (1.2) 2.9 (0.9)
8.1 (2.5) 5.7 (1.8)
12.1 (3.7) 8.6 (2.6)
16.1 (4.9) 11.5 (3.5)
20.1 (6.1) 14.3 (4.4)
24.2 (7.4) 17.2 (5.3)
32.2 (9.8) 23.0 (7.0)
Table 3-5, Table 3-6, and
Reference Manual
00809-0300-4408
Parabolic
1.3 (0.4)
2.6 (0.8)
3.9 (1.2)
5.2 (1.6)
6.4 (2.0)
7.7 (2.4)
10.3 (3.1)
Table 3-7.
Reference Manual