Configured for Specific Technical Task in System/Network Name, the Bently Nevada 21000-16-05-00-039-03-02 (21000 Proximity ProbeHousing Assemblies) provides direct physical/electrical execution.

Options and Part Matrix

The part number alphanumeric sequence specifies explicit hardware dimensions, probe compatibility, and physical fitting parameters for field deployments:

• 21000: Base model series designation for Proximity Probe Housing Assemblies.
• 16: Selects the 3300 XL 8mm proximity probe type configuration.
• 05: Defines a case length of 0.5 m (20 in). Total length orders alter in increments of 0.1 in (3 mm).
• 00: Specifies the standard option without additional modifications.
• 039: Indicates the nominal sleeve length configuration.
• 03: Provides one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip containing three separate grommets for varied external cable diameters.
• 02: Configures a 3/4-14 NPT explosion-proof conduit fitting interface.

Technical Performance Metrics

Eddy-Current Probe Scaling and Rotor Dynamics

The housing mechanics directly influence the eddy-current probe scaling accuracy within the Machinery Termination System and Turbine Supervisory Instrumentation (TSI) architecture. Maintaining strict structural rigidity prevents housing resonance from introducing artificial vibration signals into the high-speed rotor dynamics monitoring channel.

Correct physical insertion depths allow proper gap voltage validation, targeting the optimal linear region near -10 VDC. The metallic housing structure is designed to isolate the internal coil assembly, avoiding proximity cross-talk suppression failures when multiple sensor paths pass within close spatial proximity inside the machine casing.

Order Deliverables

• 1 x Bently Nevada 21000 Series 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
• 3 x Multi-size Cable Grommets (1/8 to 3/16 in, 1/4 to 5/16 in, 5/16 to 3/8 in)

Mounting Layout and Field Rules

• Thread Engagement Requirements: Ensure a minimum configuration of 5 threads engagement for all NPT structural connections to satisfy certified hazardous area explosion-proof and weatherproof containment ratings.
• Conduit and Cable Routing Guidelines: Route internal transducer extension cables away from high-voltage motor lines to block electromagnetic coupling. Ensure shield drain wires route directly to designated instrument earth terminals without forming ground loops.

Technical Support Explanations

• What happens to the calibration if the housing moves slightly during operation?

  Any physical housing displacement alters the mechanical gap distance between the probe tip and the target face, directly shifting the baseline DC gap voltage away from the calibrated -10 VDC center point.

• Does this passive mechanical housing assembly require an external electrical grounding lug?

  The physical housing grounds via direct metallic thread contact with the machine casing. Transducer cable shields must remain isolated from the housing and ground exclusively at the monitor rack.

• How do the different grommet options prevent liquid ingress into the conduit line?

  The variable inner-diameter rubber grommets clamp down tightly onto the outer jacket of the cable when compressed by the seal nut, providing a tight seal that prevents moisture migration.

• Can this housing accommodate a 3300 XL 5mm proximity probe model?

  No, the option 16 code dictates physical boring dimensions and internal sleeve mounting profiles engineered exclusively to hold the 3300 XL 8mm sensor tip configuration securely.

• What is the consequence of selecting incorrect sleeve lengths for the machine casing?

  Sleeves that are too short fail to position the probe tip within its linear measurement range against the shaft, while overly long sleeves risk catastrophic physical contact with the rotating rotor.

• Is it possible to adjust the total casing length in the field after delivery?

  The absolute physical housing dimensions are locked during factory fabrication. Fine tuning must occur within the standard thread engagement limits or by altering the external mounting brackets.

• How does the internal environment handle atmospheric condensation over long timeframes?

  The enclosure utilizes sealed NPT fittings and compression grips to lock out ambient air, keeping internal moisture from altering the high-frequency radio frequency properties of the cable.

• What happens if the internal extension cable becomes twisted during housing installation?

  Twisting creates localized physical stress on the coaxial shielding, which degrades the impedance matching and injects electrical noise into the vibration monitoring system.