Micropilot M FMR244 with FOUNDATION Fieldbus
Mounting
Hauser
15
Beam angle
The beam angle is defined as the angle a where the energy density of the radar waves reaches half
the value of the maximum energy density (3dB-width). Microwaves are also emitted outside the
signal beam and can be reflected off interfering installations. Beam diameter
W
as function of
antenna type (beam angle
α
) and measuring distance
D
:
Antenna size
(horn diameter)
FMR 244
40 mm / 1½"
L00-FMR2xxxx-14-00-06-de-027
Beam angle
α
23°
Measuring
distance (D)
Beam diameter (W)
40 mm / 1½"
3 m / 10 ft
1.22 m / 4.07 ft
6 m / 20 ft
2.44 m / 8.14 ft
9 m / 30 ft
3.66 m / 12.21 ft
a
D
W
a
D
_
=
2
2 .
. tan
W