Emerson Rosemount Apex Reference Manual page 24

™
APEX and APEX Sentry
Table 2-2. Beamwidth versus
Distance from flange face
to tank bottom
2-8
™
Radar Gauge
Distance (D)
from gauge
2-in. Antenna
ft (m) ft (m)
2 (0.6) 0.4 (0.12)
4 (1.2) 0.8 (0.25)
6 (1.8) 1.2 (0.37)
8 (2.4) 1.6 (0.49)
10 (3.0) 2.0 (0.62)
15 (4.6) 3.0 (0.93)
20 (6.1) 4.1 (1.23)
25 (7.6) 5.1 (1.54)
30 (9.1) 6.1 (1.85)
35 (10.7) 7.1 (2.16)
40 (12.2) 8.1 (2.47)
45 (13.7) 9.1 (2.78)
50 (15.2) 10.1 (3.09)
55 (16.8) 11.1 (3.40)
60 (18.3) 12.2 (3.70)
65 (19.8) 13.2 (4.01)
70 (21.3) 14.2 (4.32)
75 (22.9) 15.2 (4.63)
80 (24.4) 16.2 (4.94)
85 (25.9) 17.2 (5.25)
90 (27.4) 18.2 (5.56)
95 (29.0) 19.2 (5.86)
100 (30.5) 20.3 (6.17)
Reference Manual
00809-0100-4731, Rev FA
Radius (r) from Flange Centerline to
Beamwidth Edge
3-in. Antenna
ft (m)
0.2 (0.07)
0.5 (0.15)
0.7 (0.22)
1.0 (0.29)
1.2 (0.37)
1.8 (0.55)
2.4 (0.73)
3.0 (0.92)
3.6 (1.10)
4.2 (1.28)
4.8 (1.46)
5.4 (1.65)
6.0 (1.83)
6.6 (2.01)
7.2 (2.20)
7.8 (2.38)
8.4 (2.56)
9.0 (2.75)
9.6 (2.93)
10.2 (3.11)
10.8 (3.30)
11.4 (3.48)
12.0 (3.66)
April 2003
4-in. Antenna
ft (m)
0.2 (0.06)
0.4 (0.11)
0.6 (0.17)
0.7 (0.22)
0.9 (0.28)
1.4 (0.42)
1.8 (0.56)
2.3 (0.70)
2.8 (0.84)
3.2 (0.98)
3.7 (1.12)
4.1 (1.26)
4.6 (1.40)
5.1 (1.54)
5.5 (1.68)
6.0 (1.82)
6.4 (1.96)
6.9 (2.10)
7.4 (2.24)
7.8 (2.38)
8.3 (2.52)
8.7 (2.66)
9.2 (2.80)