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SITRANS LR200 with mA/HART
158
Operating Instructions, 05/2019, A5E32337676-AE
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
Horn O.D.
Height to sensor
reference point
1)
Beam Angle
2)
Measurement
Range
100 mm (4”)
95.3 mm (3.75”) 131.0 mm (5.16”)
29 degrees
20 m (65.6 ft)
150 mm (6”)
146.0 mm
(5.75”)
225.8 mm (8.89”)
20 degrees
200 mm (8”)
199.4 mm
(7.85”)
325.1 mm (12.79”) 17 degrees
1)
Height from bottom of horn to sensor reference point as shown: refer to Flat-face flange
with horn antenna and waveguide extension (Page 157) or Raised-face or flat-face flange
with waveguide (Page 158).
2)
– 3dB in the direction of the polarization axis (for details, refer to Polarization reference
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).