Configured for protective containment and external transducer adjustment in rotating machinery monitoring systems, the Bently Nevada 32000-28-05-06-020-07-02 (32000 Proximity Probe Housing Assemblies) provides direct physical/electrical execution.

Suffix Selection Matrix

The individual configuration elements of the 32000-28-05-06-020-07-02 metric housing assembly are defined by the following suffix parameters:

• 32000: Base model designation for extended temperature proximity probe housing assembly.
• -28: Factory-installed 3300 XL 8 mm proximity probe with multiple hazardous area approvals.
• -05: Integrated probe cable length of 0.5 meter (20 inches).
• -06: Standoff adapter length of 60 mm.
• -020: Probe penetration depth of 20 mm.
• -07: Conduit fittings option consisting of one PG21 x M20 fitting and two plugs.
• -02: Main housing mounting thread size of 3/4-14 NPT (NP).

Mechanical & Physical Parameters

Gap Voltage Validation and Rotor Dynamics Integration

The 32000-28-05-06-020-07-02 assembly integrates a 3300 XL 8 mm probe inside a high-temperature dome, providing continuous measurement data for rotor dynamics monitoring. The target displacement is captured via high-frequency eddy-current probe scaling, outputting an analog signal to a companion 3300 XL Proximitor Sensor.

For proper integration into machinery protection systems, the field engineer must execute a physical gap voltage validation. The nominal target is set to -10 VDC, corresponding to the electrical midpoint of the transducer's linear performance curve. This design ensures that static axial movement or dynamic radial vibration remains centered within the calibrated -2 VDC to -18 VDC operating window, preventing signal clipping or dynamic range saturation during transient rotor events.

Shipping Checklist

• 1 x Bently Nevada 32000-28-05-06-020-07-02 housing assembly with pre-installed 3300 XL probe
• 1 x PG21 to M20 conduit fitting adapter
• 2 x Conduit port plugs
• 1 x O-ring seal kit

Field Installation Instructions

• Thread and Seal Preparation

  Apply thread sealant to the 3/4-14 NPT mounting threads. Thread the housing assembly into the machine casing, verifying correct engagement of the 60 mm standoff adapter and the 20 mm penetration path.

• Physical Gap Calibration

  Remove the external PPS dome to expose the probe adjustment sleeves. Connect a digital voltmeter to the Proximitor terminal loop and rotate the internal adjustment sleeve until the DC gap voltage registers -10 VDC.

• Locking the Position

  Secure the locknut once the target -10 VDC calibration point is achieved. Use standard industrial torque specifications to prevent the sleeve from shifting under mechanical vibration.

• Conduit Installation

  Route the 0.5 m probe cable out through the PG21 x M20 fitting. Plug all unused conduit ports on the housing with the two provided plugs to maintain environmental sealing.

Transducer Housing FAQ

• Can the internal probe be replaced without shutting down the machinery?

  Yes, the housing design permits external access to the probe and extension cable, enabling adjustment or replacement without dismantling the machine casing.

• What is the temperature limit for the 32000 series housing assembly?

  The 32000 series offers an extended temperature range of -62 to +204 deg C, suitable for higher temperature zones than the 31000 series.

• Is this housing assembly compliant with API 670 standards?

  Yes, this assembly is fully compliant with the American Petroleum Institute's API 670 standard for externally mounted proximity probe housings.

• Does this 20 mm probe penetration configuration require an internal support sleeve?

  No, sleeve supports are only required for deep penetrations exceeding 305 mm (12 inches) to prevent mechanical resonance.

• What target material is standard for the 3300 XL 8 mm probe calibration?

  Standard calibration is configured for AISI 4140 steel. Other target materials will alter the nominal 200 mV/mil scale factor.

• What is the housing dome constructed from?

  The dome is made of high-strength polyphenylene sulfide (PPS), providing excellent chemical resistance and environmental sealing.

• How should the outer shield of the extension cable be grounded?

  The outer shield must be grounded at one point only, typically at the system monitor rack, to prevent ground loop interference.

• Why does this specific configuration utilize a standoff adapter?

  The 60 mm standoff adapter is utilized to adjust the probe casing position when the machine wall thickness is thin or when clearance is required.