Configured for high-frequency vibration and position sensing in rotating machinery, the Bently Nevada 330104-00-04-10-02-05 (330104-00-04-10-02-05 8 mm Proximity Probes) provides direct physical execution of eddy-current distance measurement within turbine monitoring (TSI) platforms.

Model Nomenclature Breakdown

The 330104 series follows the specific Bently Nevada configuration logic:

• 330104: 8 mm probe with internal armor.

• 00: Unthreaded length (0 mm).

• 04: Overall case length (40 mm).

• 10: Total length (1.0 meter).

• 02: Connector type (connector without housing).

• 05: Agency approval (CSA/NRTL/C).

Hardware Specifications

Transducer and Rotor Dynamics Characteristics

The 330104 probe system utilizes eddy-current induction to provide high-resolution displacement data. For optimal performance, the system requires precise eddy-current probe scaling to ensure the voltage output maintains linearity across the measurement range. During setup, gap voltage validation is required, with a target nominal gap of -10 VDC to position the probe at the center of its linear operating span. The 3300 series architecture is engineered to provide cross-talk suppression between adjacent probe channels, minimizing signal interference in multi-channel rotor dynamics monitoring applications where precise shaft vibration and displacement detection are required.

Ordering info

• One (1) 330104-00-04-10-02-05 Proximity Probe assembly.

• Probe tip protective cap.

• Standard compliance and safety documentation.

• Note: Proximitor sensor and extension cable are not included and must be selected to match the 8 mm probe system impedance requirements.

Field Installation Guidelines

• Mechanical Installation: Ensure the probe is mounted in a rigid bracket to prevent mechanical resonance from affecting vibration data.

• Gap Adjustment: Use a calibrated feeler gauge or depth micrometer to establish the mechanical gap; verify output at the proximitor terminal.

• Cable Management: Secure coaxial cabling at intervals to prevent movement-induced electrical noise; use stainless steel conduit if additional environmental protection is required.

• Connector Integrity: Ensure the coaxial connectors are clean and dry; do not apply excessive force when mating connectors to avoid damage to the center pin.

• Grounding: Maintain a high-quality machine ground connection at the proximitor and monitoring system rack to prevent ground loops.

Frequently Asked Questions

• What is the primary purpose of the internal armor?

  The internal armor protects the coaxial cable from mechanical damage and debris impact in harsh industrial machinery environments.

• Can this probe be used for non-metallic targets?

  No. Eddy-current probes rely on the conductive properties of the target material; calibration is specific to 4140 steel unless otherwise specified.

• What happens if the probe is mounted too close to the target?

  Operating at a gap less than the minimum linear range will cause signal clipping or "saturation," resulting in inaccurate vibration data.

• How does the 04 case length affect installation?

  The 40 mm case length defines the physical insertion depth; verify the bracket geometry to ensure sufficient thread engagement for locking.

• Is recalibration needed when replacing a probe?

  The 3300 XL system is designed for interchangeability, but a gap voltage check is mandatory whenever a probe or cable component is replaced.

• Does this probe support direct Ethernet connection?

  No. This probe requires a Proximitor signal conditioner to convert the eddy-current oscillation into a DC voltage signal readable by a data acquisition system.

• What is the impact of high temperatures on measurement?

  The probe is rated for up to +177 deg C; operating beyond this range may shift the calibration curve and reduce long-term reliability.

• How can I detect if the probe is "shorted"?

  A shorted probe typically results in a gap voltage of 0 VDC or a value outside the expected nominal range at the monitor input.