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Reference Manual
00809-0100-4026, Rev HA
Section 3: Mechanical Installation
November 2014
Mechanical Installation
3.3.3 Mounting in pipes
Still-pipe mounting is recommended for tanks with extremely turbulent surface conditions. All
cone antenna sizes for the Rosemount 5400 Series of transmitters can be used for Still-pipe
installations. The 3 in. (75 mm) antenna for the 5401 is designed for use in Still-pipes only. Rod
antennas are not recommended for Still-pipes.
When the transmitter is mounted on a Still-pipe, the inclination should be
within 1°. The gap between the antenna and the Still-pipe may be up to 0.2 in. (5 mm).
Figure 3-6. Mount the Transmitter Vertically
Recommendations for pipe installations
The pipe interior must be smooth
Not suitable for adhesive products
At least one hole is above the product surface
The hole diameter Ø should not exceed 10 % of the pipe diameter D
Holes should only be drilled on one side
Max. 0.2 in
(5 mm)
max. 1 °
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