Product data

52
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Rosemount 5300 Series
October 2014
Table 11. Nozzle Considerations
Probe Type in Chamber
Considerations
When installing a Rosemount 5300 in a chamber, the single lead probe is recommended. An
exception is with liquefied gas > 40 bar where the coaxial probe is recommended.
The recommended minimum chamber diameter is 4 in. (100 mm) for Single Flexible probe and
3 in. (75 mm) for the Single Rigid probe. The probe should be centered to prevent it touching
the sides of the well.
The probe length determines if a Single Rigid or Single Flexible probe should be used:
 Less than 20 ft (6 m):
Rigid Single Probe is recommended. Use a centering disc for probe > 3.3 ft (1 m). If
installation requires less head-space, use a Flexible Single Probe with a weight and centering
disc.
 More than 20 ft (6 m):
Use Flexible Single Probe with a weight and centering disc.
A short weight is available for the single flexible SST probe. It is used for measuring close to the
probe end and shall be used where the measuring range must be maximized. The height is 2 in.
(50 mm) and the diameter is 1.5 in. (37.5 mm). The option code is W2.
Centering Discs
To prevent the probe from contacting the chamber or pipe wall, centering discs are available for
rigid single, flexible single, and flexible twin lead probes. The disc is attached to the end of the
probe. Discs are made of stainless steel, Alloy C-276, Duplex 2205, or PTFE. The centering disc
in PTFE is not available for HTHP probes.
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 Tab le 1 5 for Dimension D. Ta bl e 16 shows which centering
disc diameter to choose for a particular pipe and Tab le 1 7 shows which
centering disc diameter to choose for a Rosemount 9901 Chamber.
D
Rigid single lead/
segmented rigid single lead
Flexible single lead Coaxial Rigid twin lead Flexible twin lead
Recommended
nozzle diameter
6 in. (15 cm) 6 in. (15 cm) > probe diameter 4 in. (10 cm) 4 in. (10 cm)
Minimum nozzle
diameter
(1)
(1) The Trim Near Zone (TNZ) function may be necessary or an Hold Off Distance/Upper Null Zone (UNZ) setup may be required to mask the nozzle.
2 in. (5 cm) 2 in. (5 cm) > probe diameter 2 in. (5 cm) 2 in. (5 cm)
Recommended
nozzle height
4 in. (100 mm) +
nozzle diameter
4 in. (100 mm) +
nozzle diameter
(2)
(2) For nozzles taller than 4 in. (100 mm), the Long Stud version is recommended (option code LS) to prevent the flexible portion from touching the edge of the
nozzle.
N/A 4 in. (100 mm) +
nozzle diameter
4 in. (100 mm) +
nozzle diameter