Configured for radial vibration and axial thrust measurements in rotating machinery protection systems, the Bently Nevada 32000-29-10-04-055-03-02 (32000 Proximity Probe Housing Assembly) provides direct physical protection and environmental sealing for internal transducers.

Part Number Code Structure

The mechanical and accessory configurations of this metric proximity probe housing assembly are designated by the following options:

• 32000: Base model number for the English/Metric Proximity Probe Housing Assembly.
• -29: Integrates a 3300 XL 8 mm proximity probe with a connector protector.
• -10: Configures a probe cable length of 1.0 m (39 in).
• -04: Specifies a standoff adapter length of 40 mm.
• -055: Configures a probe penetration depth of 55 mm.
• -03: Includes two plugs, one M20 fitting, and one cable seal grip with grommets for armored probe cable.
• -02: Selects a 3/4-14 NPT mounting thread option.

Hardware Specifications

Eddy-Current Probe Scaling and Rotor Dynamics Integration

The integrated 3300 XL 8 mm probe within the 32000-29-10-04-055-03-02 housing utilizes high-frequency eddy-current probe scaling to convert physical dynamic distance into proportional voltage. The system tracks rotor dynamics by generating a magnetic field at the probe tip, interacting with the target shaft of turbines, compressors, or pumps.

To ensure precise monitoring without signal distortion, a physical gap voltage validation must be performed during commissioning. Technicians adjust the axial depth of the probe within the sleeve until the output measures a target of -10 VDC. This sets the probe in the center of its linear range, enabling optimal resolution for shaft vibration and cross-talk suppression.

Ordering Info

• 1 x Bently Nevada 32000-29-10-04-055-03-02 Housing Assembly
• 1 x Integrated 3300 XL 8 mm proximity probe with connector protector
• 2 x Sealing plugs
• 1 x M20 conduit fitting
• 1 x Cable seal grip with grommets for armored cable

Field Installation Guidelines

• Verifying Mount Thread Sealing

  Apply industrial-grade liquid thread sealant to the 3/4-14 NPT mounting thread. Ensure a minimum of five full threads of engagement into the machine case to guarantee mechanical stability under heavy vibration.

• Selecting Correct Cable Grommets

  Utilize the specialized grommets included with option 03 to seal the armored probe cable. The grommet must match the outer diameter of the armor jacket to prevent lubricating oil or moisture from entering the housing.

• Internal O-Ring Ingress Protection

  Inspect the Neoprene O-ring located between the sleeve and the housing body before locking down the position. This seal is necessary to maintain NEMA 4X and IP66 ratings against hose-directed water.

Frequently Asked Questions

• How is the target gap voltage validated for this specific housing assembly?

  A digital voltmeter is connected to the associated Proximitor loop while the probe is adjusted mechanically inside the sleeve to achieve a target of -10 VDC.

• Can the internal 3300 XL probe be replaced without stopping the machine?

  Yes, the housing allows external access, permitting technicians to withdraw the sleeve and replace the probe without machinery disassembly.

• Does the PPS plastic housing resist high pressure within turbine casings?

  No, the housing seals against fluid splash and low differential pressure but is not designed or rated to contain high internal casing pressure.

• What is the benefit of the integrated connector protector (Option 29)?

  The connector protector physically shields the miniature coaxial connection from environmental contaminants and prevents accidental unmating during thermal cycling.

• Can standard unarmored extension cables be routed through this housing?

  The option 03 configuration is specifically optimized with grommets for armored cables, though standard cables can be routed if compatible sealing grommets are sourced.

• What is the physical function of the 40 mm standoff adapter?

  The standoff adapter positions the main body of the housing 40 mm away from the machine case, allowing proper clearance for the 55 mm probe penetration depth.

• How does incorrect thread engagement affect the measurement signals?

  Insufficient engagement allows the housing to flex or vibrate independently of the machine case, introducing mechanical noise and skewing rotor dynamics data.

• Is the probe factory calibrated for non-magnetic target shafts?

  The probe is calibrated for standard AISI 4140 steel targets; alternative target metals will alter the eddy-current scaling curve.