Operating Instructions

Table Of Contents
Threaded horn with extension dimensions
Antenna
Type
Antenna
O.D., mm
(inch)
Height to sensor reference point, mm (inch)
a)
Beam An‐
gle (°)
b)
Measurement
range, m (ft)
1-1/2" threaded con‐
nection
2" threaded con‐
nection
3" threaded con‐
nection
1.5" 39.8 (1.57) 235 (9.25) N/A N/A 19 10 (32.8)
2" 47.8 (1.88) N/A 266 (10.47) 280 (11.02) 15 20 (65.6)
3" 74.8 (2.94) N/A 299 (11.77) 313 (12.32) 10 20 (65.6)
4" 94.8 (3.73) N/A 354 (13.94) 368 (14.49) 8 20 (65.6)
a)
Height from bottom of horn to sensor reference point as shown: see dimension drawing.
b)
-3dB in the direction of the polarization axis. For an illustration, see Polarization reference
point (Page 29).
Dimension drawings
12.6 Stainless steel threaded horn antenna with extension
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 185