Siemens SITRANS LR250 Compact Operating Instructions page 22

Installing/mounting
4.3 Proper mounting
Beam angle
Note
● Beam width depends on antenna size and is approximate: see table below.
● Beam angle is the width of the cone where the energy density is half of the peak energy
density.
● The peak energy density is directly in front of and in line with the antenna.
● There is a signal transmitted outside the beam angle, therefore false targets may be
detected.
Horn antenna
1
Threaded PVDF antenna
1
①
②
20
2
2
Emission cone
Beam angle
Preferred
Undesirable
Flanged encapsulated antenna
1
2
Hygienic encapsulated antenna
1
2
Compact Operating Instructions, 06/2018, A5E33469191-AB
LR250 (mA/HART)