Installing/mounting
4.3 Proper mounting
SITRANS LR250 with FOUNDATION FIELDBUS
22 Compact Operating Instructions, 09/2021, A5E48453221-AB
4.3.3 Nozzle location
• Avoid central locations on tall, narrow vessels
• Nozzle must be vertical and clear of imperfections
Beam angle
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.
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