Configured for external mounting and environmental protection of radial vibration transducers in Bently Nevada TSI systems, the Bently Nevada 31000-28-10-00-087-03-02 (31000 Proximity Probe Housing Assembly) provides direct physical/electrical execution. The assembly permits probe gap adjustment and probe replacement without machine disassembly while maintaining mechanical protection for 3300 XL proximity transducer installations.

Model Configuration Matrix

Mechanical and Environmental Specifications

Gap Voltage and Probe Alignment Characteristics

The 31000 housing assembly maintains mechanical positioning stability for eddy-current proximity probes during rotor vibration monitoring. Proper probe sleeve positioning is required to maintain acceptable gap voltage targets during transducer calibration procedures.

For 3300 XL probe systems, incorrect penetration depth or excessive side-view exposure inside the machine case may distort the linearity of the eddy-current field. Probe penetration lengths between 1.0 in and 2.0 in may require machine case counter boring to minimize side-view effects.

Cross-talk suppression between adjacent transducer channels depends on maintaining proper cable routing separation and shield continuity through the housing assembly and conduit fittings.

Technical Questions

Q: Is the 31000 housing explosion-proof?
A: No. The housing provides environmental and mechanical protection only. Explosion-proof applications require CA21000 or CA24701 housing assemblies.

Q: What occurs if the total sleeve length exceeds 12 in (305 mm)?
A: Additional sleeve support near the probe is recommended to reduce resonance and mechanical instability.

Q: Can the housing be used in intrinsically safe hazardous areas?
A: Yes. The housing assembly may be used in intrinsically safe applications when installed with approved transducer systems and appropriate intrinsic safety barriers.

Q: What sealing materials are used inside the housing assembly?
A: The probe case uses a Viton O-ring while the sleeve-to-housing interface uses a Neoprene O-ring.

Q: Does exposure to steam affect the PPS housing material?
A: Brief exposure to hot water or condensing steam up to one week should not significantly affect housing strength. Extended exposure may reduce long-term material strength.

Probe Housing Installation Practices

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

• Adjust probe gap prior to securing the housing assembly.

• Maintain single-point shield grounding for proximity transducer cable assemblies.

• Tighten retaining nuts to the specified 29.4 N.m torque value.

• Avoid unsupported long sleeve sections exceeding 305 mm without additional stabilization.

• Inspect all conduit fittings and hole plugs before machine startup.

• Separate transducer cable routing from high-energy motor conductors and switching circuits.

• Tighten unused hole plug nuts to 0.5 N.m when installed.

Ordering Information

• 1 x Bently Nevada 31000-28-10-00-087-03-02 Proximity Probe Housing Assembly

• Installed 3300 XL 8 mm proximity probe

• Conduit fitting and cable seal components per option code

• Anti-static industrial packaging

• Optional accessories available separately:

• 37948-01 Probe Support / Oil Seal

• 108883 Probe Sleeves

• 109319 Standoff Adapters

• 104288 Blanking Plugs

Shipping Information

Delivery time: 2-7 days when payment finish. Shipment through DHL, FedEx, or UPS using reinforced anti-static industrial packaging for vibration monitoring hardware and stainless-steel mechanical assemblies.