Figure 3-23: Prevent the Probe from Contacting the Wall
For the segmented rigid single lead probe, up to five PTFE centering discs can be mounted
along the probe, but keep a minimum distance of two segments between the discs.
Additionally, a disc in SST or PTFE (part number 03300-1655-xxxx) can be attached to the
end of the probe.
When mounting a centering disc, it is important that it fits correctly in the chamber/pipe.
See Figure 3-24 for Dimension D. Table 3-14 shows which centering disc diameter to
choose for a particular pipe. Table 3-15 shows which centering disc diameter to choose for
a Rosemount 9901 Chamber.
Figure 3-24: Dimension D for Centering Discs
Table 3-13: Centering Discs Dimensions
Disc size Actual disc diameter (D)
2-in. 1.8 in. (45 mm)
3-in. 2.7 in. (68 mm)
4-in. 3.6 in. (92 mm)
6-in. 5.55 in. (141 mm)
8-in. 7.40 in. (188 mm)
Reference Manual Mechanical installation
00809-0100-4530 April 2019
Reference Manual 61
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