Mounting: Threaded Rod Antenna; Mounting: Manhole Covers - Siemens SITRANS LR 300 Instruction Manual

If the mounting illustrated on page 28 is not suitable due to the minimum blanking
requirements, consider the shielded rod or horn antenna options.
Nozzles that are 200mm (8") or larger in diameter provide excellent signal conditions.
Under these conditions you can use the standard rod without extensions for nozzle
lengths of up to 610mm (24").

Mounting: Threaded Rod Antenna

You can use 1.5" or 2" threaded process connections. There are three thread types: NPT,
BSP , and G.
316 S.S.
PTFE
Note:
The use of Teflon or other appropriate sealant may be used to aid in sealing
tapered threaded connections for use in pressure applications.
WARNING: Improper installation may result in loss of process
pressure.

Mounting: Manhole Covers

100 mm
(4")
7ML19985CL02 SITRANS LR 300 – INSTRUCTION MANUAL
Min. I.D. 100mm
Max. nozzle height 100mm (4")
For smaller sizes, use the
shielded rod configuration.
A manhole cover is typically a nozzle that
is 610mm (24") or greater in diameter,
with a cover.
To provide the optimum signal
conditions, locate the antenna off-center
with respect to the cover, typically
100mm (4") from the side of the manhole
Page 29