Product Data Sheet
00813-0100-4530, Rev DA
December 2010
Rosemount 5300 Series
34
Chamber / Pipe Installations
Rosemount 9901 Chamber Rosemount 9901 allows external mounting
of process level instrumentation. It supports
a variety of process connections, and
optional drain and vent connections. The
Rosemount 9901 chamber is designed to
the ASME B31.3 standard, and is Pressure
Equipment Directive (PED) compliant. Use
option code XC to order together with the
5300 Series transmitters.
The probe length to use for a Rosemount
9901 chamber can be calculated with this
formula (only valid for standard 9901
chambers):
Side-and-Side dimension:
Probe length=Centre-to-Centre
dimension+19 in. (48 cm)
Side-and-Bottom dimension:
Probe length=Centre-to-Centre
dimension+4 in. (10 cm)
Use a centering disc the same diameter as the chamber if the probe length >3.3 ft (1 m). See “Probe
Type in Chamber Considerations” on page 34 and “Centering Discs” on page 35 for which probe and
disc to use
For additional information, see the Rosemount 9901 Chamber for Process Level Instrumentation
Product Data Sheet (Document Number 00813-0100-4601)
Existing Chamber A Rosemount 5300 Series transmitter is the perfect
replacement in an existing displacer chamber.
Proprietary flanges are offered, enabling use of
existing chambers to make installation easy.
Considerations when changing to 5300:
The 5300 series flange choice and probe length
must be correctly matched to the chamber. Both
standard ANSI and EN (DIN), as well as proprietary
chamber flanges, are available. See “Special
Flanges and Flushing Connection Rings” on
page 51 to identify the proprietary flanges.
See “Probe Type in Chamber Considerations” on
page 34 and “Centering Discs” on page 35 for which
probe and disc to use. See Table 12 on page 35 for
guidelines on the required probe length
For additional information, see the Replacing Displacers with Guided Wave Radar Technical Note
(Document Number 00840-2200-4811)
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.
Side-and-Bottom
dimension
Replace
chamber
flange
Displacer
Length
Probe
Length
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