Flanged Horn Dimensions; Raised-Face Or Flat-Face Flange With Waveguide - Siemens SITRANS LR200 7ML5422 Operating Instructions Manual

A.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 157) or Raised-face or flat-face flange
with waveguide (Page 158).
– 3dB in the direction of the polarization axis (for details, refer to Polarization reference
2)
point (Page 25)).
A.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 161) or Flat-face flange dimensions (Page 163).
158
Horn O.D. Height to sensor
reference point
95.3 mm (3.75") 131.0 mm (5.16")
146.0 mm 225.8 mm (8.89")
(5.75")
199.4 mm 325.1 mm (12.79")
(7.85")
Beam Angle
2)
1)
29 degrees
20 degrees
17 degrees
SITRANS LR200 with mA/HART
Operating Instructions, 05/2019, A5E32337676-AE
Measurement
Range
20 m (65.6 ft)