Configured for external eddy-current transducer mounting in 3300 XL vibration monitoring systems, the Bently Nevada 31000-29-10-20-025-02-02 (31000 Proximity Probe Housing Assembly) provides direct mechanical support and environmental sealing for reverse mount proximity probe installations. The assembly permits external probe gap adjustment and connector access without machine disassembly.

Assembly Configuration

Technical Specifications

Gap Voltage and Rotor Dynamics

The housing assembly supports stable probe positioning for eddy-current transducer systems operating with standard 3300 XL scaling characteristics. During commissioning, probe gap voltage is typically adjusted near the -10 VDC target region required for linear shaft displacement measurement.

The conductive PPS enclosure assists with electrostatic dissipation in hazardous locations and reduces unwanted signal coupling between adjacent probe cable paths. Proper sleeve support becomes necessary when combined standoff and penetration dimensions exceed 305 mm to minimize resonance-induced probe movement during rotor dynamic operation.

Engineering Questions

Q: Does the assembly include connector protection hardware?
A: Yes. Option code 29 includes a connector protector integrated with the installed 3300 XL 8 mm probe.

Q: Can the housing be used in intrinsically safe installations?
A: Yes. The housing can be used with approved transducer systems and appropriate intrinsic safety barriers.

Q: Is the housing rated for internal process pressure containment?
A: No. The assembly provides environmental sealing but is not designed as a pressure-retaining enclosure.

Q: What fitting arrangement is supplied with option code 02?
A: Two 3/4-14 NPT conduit fittings and one sealing plug are included.

Q: Is probe gap adjustment accessible after installation?
A: Yes. External access to the probe sleeve permits gap verification and adjustment without machine teardown.

Installation Practices

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

• Maintain probe cable separation from high-current conductors to reduce induced electrical noise.

• Verify single-point shield grounding practices for proximity transducer wiring.

• Tighten retaining hardware to specified torque values to prevent mechanical drift during vibration exposure.

• Use blanking plugs to seal unused conduit openings and maintain enclosure integrity.

• Avoid prolonged exposure to condensing steam or chemically aggressive liquids around probe sealing surfaces.

• Additional sleeve support is recommended for long penetration assemblies to reduce resonance effects.

Included Components

• 31000 PPS housing assembly

• Installed 3300 XL 8 mm reverse mount probe

• Connector protector assembly

• 1.0 m probe cable

• Dual 3/4-14 NPT conduit fittings

• Stainless steel mounting hardware

• Environmental sealing components

Logistics and Packing

• Delivery time: 3-5 days when payment finish

• Shipment through DHL, FedEx, or UPS industrial export service

• Anti-static industrial packaging with reinforced internal cushioning

• Moisture-resistant protective wrapping applied for international transport handling