Flanged Horn Dimensions; Raised-Face Or Flat-Face Flange With Waveguide - Siemens SITRANS L Operating Instructions Manual

B.1.5

Flanged horn dimensions

Note
• Signal amplitude increases with horn diameter, so use the largest practical size.
• 80 mm (3") and 100 mm (4") are not recommended in vessels due to the wide beam/ poor
performance. They are to be used in stillpipe applications only.
Nominal Horn
Size
100 mm (4")
150 mm (6")
200 mm (8")
Height from bottom of horn to sensor reference point as shown: refer to Flat-face flange
1)
with horn antenna and waveguide extension (Page 162) or Raised-face or flat-face flange
with waveguide (Page 163).
– 3dB in the direction of the polarization axis (for details, refer to Polarization reference
2)
point (Page 28)).
B.1.6

Raised-face or flat-face flange with waveguide

Note
• You can connect a maximum of two waveguides together.
• This option is recommended only for clean liquids on vessels without agitators or
turbulence.
• Horizontal stress on this antenna must be avoided, otherwise mechanical support may be
required.
• For other flange dimensions and bolt hole sizing, refer to Raised-face flange dimensions
(Page 166) or Flat-face flange dimensions (Page 168).
SITRANS LR200 with PROFIBUS PA
Operating Instructions, 07/2021, A5E32337680-AF
Horn O.D. Height to sensor
reference point
95.3 mm 131.0 mm (5.16")
(3.75")
146.0 mm 225.8 mm (8.89")
(5.75")
199.4 mm 325.1 mm (12.79")
(7.85")
B.1 Flange adapter versions
Beam Angle
2)
1)
29 degrees
20 degrees
17 degrees
Antenna options
Measurement
Range
20 m (65.6 ft)
163