Emerson Rosemount 5408 Reference Manual page 199

Specifications and Reference Data
Figure A-14: Bracket Mounting (Process Connection Type Code B)
Pipe mounting (vertical pipe) Pipe mounting (Horizontal pipe)
Pipe diameter, max 2.52 in. (64 mm)
5.60
(142)
Wall mounting Hole pattern for wall mounting
0.87 (22)
0.35 (9)
2.76
(70)
NPT 1½-in.
2.24
(57)
Dimensions are in inches (millimeters).
Rosemount 5408 and 5408:SIS Level Transmitters 189