The Bently Nevada 31000-28-10-00-133-03-02, also cataloged as the 31000 Proximity Probe Housing Assembly, operates as a dedicated hardware component for external mounting and environmental protection of eddy-current proximity probes within 3300 XL machinery monitoring systems. The assembly supports radial vibration and Keyphasor signal measurement paths while maintaining external probe access for gap adjustment and replacement procedures.

Configuration Matrix

Mechanical and Electrical Data

Eddy-Current Signal Management

The housing assembly supports external mounting of 3300 XL eddy-current transducers while maintaining controlled mechanical alignment between the probe sleeve and rotating shaft target. Probe access through the removable housing structure allows direct gap voltage verification during commissioning and maintenance intervals.

For standard 3300 XL probe systems, target gap voltage adjustment is typically validated near the -10 VDC operating region defined by the associated proximitor system. The conductive PPS housing structure assists in minimizing electrostatic accumulation around the probe cable routing area.

Probe sleeve lengths exceeding 305 mm require additional mechanical support near the probe body to reduce resonance-related movement and signal instability during rotor dynamic loading conditions.

Technical Questions

Q: Can the housing assembly be used for axial position measurements with dual probes?
A: Dual axial position measurements should use housing model 21022 rather than the 31000 series assembly.

Q: Does the housing provide explosion-proof protection?
A: No. The assembly provides environmental and mechanical protection only. Explosion-proof applications require CA21000 or CA24701 housings.

Q: Is probe replacement possible without machine disassembly?
A: Yes. The housing allows external probe and extension cable access for replacement and gap adjustment procedures.

Q: Are long probe penetration configurations mechanically supported?
A: Probe sleeve assemblies with combined standoff and penetration lengths greater than 12 in should include additional support to prevent resonance effects.

Q: Does the assembly require external power input?
A: No. The housing assembly is a passive mechanical protection component and does not consume electrical power.

Site Mounting Notes

• Install the outer sleeve into the machine case before probe insertion.

• Verify probe gap voltage after sleeve positioning and before housing closure.

• Maintain shield continuity and avoid grounding the probe cable shield at multiple points.

• Tighten retaining nuts to the specified torque value to prevent sleeve movement during machine vibration.

• Use conduit fittings when rigid metal conduit or armored cable enters the housing body.

• Seal unused housing openings with threaded plugs to maintain IP66 environmental protection.

• Avoid exposure to aggressive high-pH or low-pH process fluids that may degrade probe tip sealing materials.

• For penetration lengths below 1.0 in, side-view or rear-view metallic interference effects may influence transducer output.

Package Contents

• 31000 PPS housing assembly

• Installed 3300 XL 8 mm probe

• 1.0 m probe cable

• Stainless steel sleeve hardware

• 3/4-14 NPT conduit fitting set

• Cable seal grip and reducer

• Factory-installed environmental seals

Shipment Details

• Delivery time: 2-7 days when payment finish

• Shipment via DHL, FedEx, or UPS international industrial logistics channels

• Anti-static industrial packaging with reinforced mechanical cushioning

• Moisture-protected export carton for long-distance transport environments