Configured for transducer positioning in machine monitoring systems, the Bently Nevada 21000-16-05-15-102-03-02 (21000-16-05-15-102-03-02 Proximity Probe Housing Assembly) provides direct physical execution for housing eddy-current probes in industrial rotating machinery.

Model Suffix Breakdown

• 21000: Base Model (Proximity Probe Housing Assembly)
• 16: 3300 XL 8 mm probe compatibility
• 05: 0.5 m (20 in) probe length
• 15: Minimum length 1.5 in (38 mm)
• 102: Housing case length designator
• 03: Hardware accessory set (3/4-14 NPT plug, 3/4-14 to 1/2-14 NPT reducer, cable seal grip)
• 02: 3/4-14 NPT process connection thread

Hardware Specifications

Mechanical Monitoring and Transducer Alignment

This housing assembly facilitates precise eddy-current probe scaling. Successful integration requires accurate gap voltage validation against -10 VDC targets during machine commissioning. The mechanical design of the housing supports cross-talk suppression by providing a robust, stable mounting point that isolates the probe from chassis-induced vibration. Maintaining consistent transducer alignment is required to ensure that the monitored rotor dynamics data remains within specified measurement tolerances.

Ordering Information

• 1 x 21000-16-05-15-102-03-02 Probe Housing Assembly
• 1 x 3/4-14 NPT Plug
• 1 x 3/4-14 to 1/2-14 NPT Reducer
• 1 x Cable seal grip kit (includes grommets for 1/8-3/16, 1/4-5/16, and 5/16-3/8 inch cables)

Field Installation Guidelines

• NPT Thread Engagement: Utilize a minimum of 5 full threads when engaging the assembly into the machine port to guarantee pressure containment and thread strength.
• Environmental Sealing: Select the grommet size that matches the probe cable outer diameter. Ensure the cable gland nut is tightened to provide a moisture-proof seal.
• Gap Setting: Verify the probe tip-to-shaft distance according to the system monitor configuration before securing the internal probe locknut.
• Thread Maintenance: Use appropriate anti-seize compound on NPT threads during assembly to ensure the housing can be removed during future maintenance without thread damage.

Frequently Asked Questions

• Is this housing assembly pressure-tested?

  The housing is engineered for industrial casing ports; verify all thread connections and seal integrity against the machine casing pressure requirements before operation.

• Can I replace the cable seal grip in the field?

  Yes, the seal grip is a user-replaceable component. Ensure the replacement matches the housing thread and is compatible with the probe cable diameter.

• What is the purpose of the 102 designator?

  This identifies the specific case length required for proper probe reach and positioning within the machine housing geometry.

• How is the probe locked in place?

  The assembly includes an internal locking mechanism, typically a locknut or collet, which must be tightened after setting the final gap distance.

• Can the housing be mounted in any orientation?

  Yes, the housing is orientation-independent, provided the NPT connection is sealed and the probe cable is properly secured to prevent mechanical strain.

• What does the 1.5 inch minimum length refer to?

  This is the minimum housing length required to accommodate the probe configuration and ensure the probe tip does not contact the rotating shaft.

• How is the shield grounded?

  The housing provides mechanical continuity to the machine casing; ensure the casing itself is properly connected to the system earth ground.

• Does this housing require periodic inspection?

  Inspect for vibration-induced loosening of the NPT joint and ensure the cable gland remains tight to prevent ingress of oil or contaminants into the housing.