Configured for non-contact shaft displacement and vibration monitoring in 3300 XL monitoring architectures, the Bently Nevada 330105-02-12-50-02-00 (330105 Proximity Probe) provides direct physical and electrical execution of eddy-current transducer functions. This reverse-mount hardware component converts shaft surface proximity into a proportional voltage signal, relaying mechanical motion data to the Proximitor sensor interface for system-level processing. The probe assembly maintains strict adherence to signal linearity requirements, facilitating high-fidelity data acquisition for rotating machinery protection.

Suffix Breakdown & Model Matrix

• 330105: 3300 XL 8 mm Reverse Mount Proximity Probe
• 02: 3/8-24 UNF threads
• 12: Miniature ClickLoc coaxial connector
• 50: 5.0 meters (16.4 feet) total system length
• 02: Total length with connector
• 00: Agency approval not required

Hardware Specifications

Mechanical Monitoring and TSI Signal Integrity

The 3300 XL system requires precise eddy-current probe scaling to maintain linear output across the 2 mm measurement range. During installation, technicians must perform gap voltage validation, targeting -10 VDC to ensure the probe resides at the midpoint of its linear operating curve. This calibration is necessary for accurate analysis of rotor dynamics, including radial vibration and axial position. Cross-talk suppression is maintained by the integrated coaxial shielding, provided that the cable assembly is routed away from high-energy electromagnetic fields and the connection to the Proximitor is secured against physical vibration.

Ordering info

• 1 x 330105-02-12-50-02-00 Reverse Mount Probe
• 1 x Technical documentation set

Field Installation Guidelines

• Probe Mounting:
  • Ensure the probe is mounted through a non-conductive bracket if isolation from machine ground is required.
  • Use a jam nut to secure the 3/8-24 UNF threads; maintain a torque limit of 5.6 Nm to avoid casing distortion.
• Wiring and Routing:
  • Protect the coaxial cable from sharp edges; observe a minimum 50 mm bend radius to maintain internal impedance.
  • Secure the cable along the machine casing using non-abrasive clips to prevent fatigue from high-frequency vibration.
• Interface Verification:
  • Ensure the ClickLoc connector is fully seated and locked to prevent intermittent signal continuity.
  • Verify shield continuity from the probe head to the monitor rack ground reference point.

Frequently Asked Questions

• Q: Can I bench calibrate this probe independently of the system?

  A: The 3300 XL system is designed for total system interchangeability; individual components are factory-calibrated to eliminate the need for bench calibration.

• Q: What happens if the gap voltage deviates significantly from -10 VDC?

  A: Deviations suggest improper probe positioning or surface damage on the target shaft, which will cause non-linear output and signal distortion.

• Q: Is this probe compatible with older 3300 series proximity systems?

  A: No. The 3300 XL components are specifically designed for the 3300 XL system; using mismatched components will invalidate signal accuracy.

• Q: Can the coaxial cable be shortened?

  A: No. The system calibration is dependent on the total length of the probe and extension cable; cutting the cable will alter the impedance.

• Q: Does the probe tip require a protective cover during shipping?

  A: Yes. The probe tip is a precision component; keep protective caps installed until the moment of installation to prevent damage to the PPS face.

• Q: What is the maximum frequency response?

  A: The transducer system maintains a linear response from DC up to 10 kHz, sufficient for most industrial turbomachinery monitoring requirements.

• Q: Are there specific grounding requirements for this probe?

  A: The probe body should generally be at the same potential as the machine housing; if electrical isolation is needed, use specified isolation kits.

• Q: How do I identify a secure ClickLoc connection?

  A: A proper connection is confirmed by an audible and tactile click, followed by a slight resistance when pulling on the connector housing.