2.2 Beam area in the measuring range
List 2.2-1
：
Beam angle & Beam area (
＊
-3dB Half-power beam angle)
Distance (m)
Beam area (m)
Lengthwise direction
(cable direction
）
Beam angle
＊
=50
°
Crosswise direction
Beam angle
＊
=23
°
2
1.9
0.8
4
3.7
1.6
6
5.5
2.4
8
7.5
3.3
10
9.3
4.1
[ Key factors for measurement ]
1. Compared to calm fluid surfaces, measuring ranges of turbulent surfaces are
reduced due to poorer reflection.
2. Deposit buildup on the antenna, foaming on liquid surfaces, powder granules in air
suspension and other interior tank conditions may affect measuring range and
performance.
3. Obstructions in the microwave radiating area or target fluid surface areas less than
the radiating area will reduce microwave reflection and decrease and narrow the
measurable range.
4. Measurable range may be varied when area of target fluid surface is smaller than
radiated beam area.
2m
4m
6m
8m
10m
Distance
23.0°
50.0°
Beam area
Long side
Short side
2-2
