Endress+Hauser Micropilot FMR67B - Page 20

Micropilot FMR67B PROFINET with Ethernet-APL
20 Endress+Hauser
D
W
D
_
=
2
2
. .
tan
W
α
α
A0031824
 12 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.
Horn antenna 65 mm (2.56 in), α 4 °
W = D × 0.07 D W
D
W
α
5 m (16 ft) 0.35 m (1.15 ft)
10 m (33 ft) 0.70 m (2.30 ft)
15 m (49 ft) 1.05 m (3.45 ft)
20 m (66 ft) 1.40 m (4.59 ft)
25 m (82 ft) 1.75 m (5.74 ft)
30 m (98 ft) 2.10 m (6.89 ft)
35 m (115 ft) 2.45 m (8.04 ft)
40 m (131 ft) 2.80 m (9.19 ft)
45 m (148 ft) 3.15 m (10.33 ft)
50 m (164 ft) 3.50 m (11.48 ft)
80 m (262 ft) 5.60 m (18.37 ft)
100 m (328 ft) 7.00 m (23.00 ft)
125 m (410 ft) 8.75 m (28.71 ft)
Drip-off, PTFE 50 mm (2 in) antenna, α = 6 °
W = D × 0.10 D W
D
W
α
5 m (16 ft) 0.52 m (1.70 ft)
10 m (33 ft) 1.04 m (3.41 ft)
15 m (49 ft) 1.56 m (5.12 ft)
20 m (66 ft) 2.08 m (6.82 ft)
25 m (82 ft) 2.60 m (8.53 ft)
30 m (98 ft) 3.12 m (10.24 ft)
35 m (115 ft) 3.64 m (11.94 ft)
40 m (131 ft) 4.16 m (13.65 ft)
45 m (148 ft) 4.68 m (15.35 ft)
50 m (164 ft) 5.20 m (17.06 ft)