Bently Nevada's 31000/32000 Proximity Probe Housing Assemblies are recommended when mounting proximity probes through the machine case and are typically used for radially mounted transducers, whether vibration or Keyphasor® measurements.

Use of a proximity probe housing allows external access to the proximity probe and its extension cable, permitting gap adjustment or probe replacement without disassembly of the machine. The 31000/32000 Proximity Probe Housing Assembly is made of polyphenylene sulfide (PPS), an advanced, high-strength, thermoplastic with excellent corrosion resistance. Other elements of the housing assembly are made of corrosion-resistant stainless steel. The housing can be ordered with installed 3300 XL Proximity Probes and a variety of conduit fittings.
The 31000/32000 Proximity Probe Housing Assembly is fully compliant with the American Petroleum Institute's (API) 670 Standard for externally mounted proximity probe housings.

Ordering Information
Note: Conduit fittings are necessary when hardline conduit or metal tubing is brought into the housing. Flexible conduit should be ordered with integral 3/4-14 NPT fittings and do not require additional conduit fittings with the housing. If using flexible conduit, order the "E" = 00 option.
31000-AXX-BXX-CXX-DXXX-EXX-FXX
Note: To order housing only, use -00 for all Options.
Option Descriptions
A: Probe Option, With Connector
0 0 Probe not required (Note: Option B must also be -00).
1 6 3300 XL 8 mm probe
2 6 3300 XL NSv™ probe
2 7 3300 XL NSv™ probe, multiple approvals
2 8 3300 XL 8 mm probe, multiple approvals
2 9 3300 XL 8mm probe, with connector protector
3 0 3300 XL 8mm probe, with connector protector, multiple approvals
3 1 3300 XL NSvTM probe, with connector protector
3 2 3300 XL NSvTM probe, with connector protector, multiple approvals
3 3 3300 XL 11mm probe
3 4 3300 XL 11mm probe, multiple approvals
3 5 3300 XL 11mm probe, with connector protector
3 6 3300 XL 11mm probe, with connector protector, multiple approvals
B: Probe Cable Length Option (See Table 1)
0 0 Probe cable not required (Note: Option A must also be -00).
0 5 0.5 metre (20 in)
1 0 1.0 metre (39 in)
C: Standoff Adapter Option ("C" Dimension)
Order in increments of 0.5 in (13 mm).
Minimum length: 1.5 in (38 mm).
Maximum length: 7.5 in (191 mm).
Example:
0 0 = No standoff adapter.
1 5 = 1.5 in (38 mm).
D: Probe Penetration Option ("D" Dimension)
Note: "C" plus "D" dimensions greater than 12 in (305 mm) require additional sleeve support near the probe to prevent resonance from occurring. Sleeve adjustment range of Probe Penetration Option "D" is ±0.5 in (13 mm).
For penetration lengths between 1.0 and 2.0 inches, counter bore may be required in machine case to reduce probe side view and/or rear view effects.
Order in increments of 0.1 in (3 mm).
Minimum length: 1.0 in (25 mm).
Maximum length: 30 in (762 mm), see Table 1 for cable length limits.
Example:
0 0 0 = No probe sleeve.
0 3 7 = 3.7 in ( 94 mm).
2 2 4 = 22.4 in (569 mm).
E: Fittings Option
0 0 No fittings; two plugs and two washers.
0 1 One 3/4-14 NPT fitting, two plugs.
0 2 Two 3/4-14 NPT fittings, one plug.
0 3 Two plugs, one 3/4-14 NPT fitting, one 3/4-14 NPT to 1/2-14 NPT SST reducer, and a cable seal grip with grommets for cable sizes: 1/8 to 3/16, 1/4 to 5/16, and 5/16 to 3/8-in.
0 6 One 3/4-14 NPT fitting one 3/4-14 NPT to 1/2-14 NPT SST reducer and two plugs.
F: Mounting Thread Option
0 0 No outer sleeve, retainer, or retaining nut
0 2 3/4-14 NPT (Required if ordering Standoff Adapter Option).
0 5 7/8-14 UNF 2A

Metric Proximity Probe Housing
32000-AXX-BXX-CXX-DXXX-EXX-FXX
Option Descriptions
Note: To order housing only, use -00 for all options.
A: Probe Option, With Connector
0 0 Probe not required. (Note: Option B must also be -00).
1 6 3300 XL 8 mm probe.
2 6 3300 XL NSv™ probe
2 7 3300 XL NSv™ probe, multiple approvals
2 8 3300 XL 8 mm probe, multiple approvals.
2 9 3300 XL 8mm probe, with connector protector
3 0 3300 XL 8mm probe, with connector protector, multiple approvals
3 1 3300 XL NSvTM probe, with connector protector
3 2 3300 XL NSvTM probe, with connector protector, multiple approvals
3 3 3300 XL 11mm probe
3 4 3300 XL 11mm probe, multiple approvals
3 5 3300 XL 11mm probe, with connector protector
3 6 3300 XL 11mm probe, with connector protector, multiple approvals
B: Probe Cable Length Option
0 0 Probe cable not required (Note: Option A must also be -00).
0 5 0.5 metre
1 0 1.0 metre
C: Standoff Adapter Option ("C" Dimension)
Order in increments of 10 mm.
Minimum length: 40 mm.
Maximum length: 200 mm.
Example:
0 0 = No standoff adapter.
0 4 = 40 mm.
2 0 = 200 mm.
D: Probe Penetration Option ("D" Dimension)
Note: "C" plus "D" dimensions greater than 305 mm (12 in) require additional sleeve support near the probe to prevent resonance from occurring. Sleeve adjustment range of Probe Penetration Option "D" is ± 13 mm (0.5 in).
For penetration lengths between 25 and 50 millimeters, counter bore may be required in machine case to reduce probe side view and/or rear view effects.
Order in increments of 1 mm.
Minimum length: 25 mm.
Maximum length: 760 mm, see Table 1 for cable length limits.
Example:
0 0 0 = No probe sleeve.
0 5 0 = 50 mm
7 6 0 = 760 mm
E: Fittings Option
0 0 No fittings; two plugs and two washers.
0 1 One M25 fitting, two plugs.
0 2 Two M25 fittings, one plug.
0 3 Two plugs, M20 fitting, and one cable seal grip with grommet for armored probe cable.
0 5 One DIN PG11 fitting, two plugs.
0 7 One PG21 x M20 fitting, two plugs
0 8 Two PG21 x M20 fittings, one plug
F: Mounting Thread Option
0 0 No outer sleeve, retainer or retaining nut
0 1 M24 X 3
0 2 3/4-14 NPT (Required if ordering Standoff Adapter Option.)