Configured for displacement sensing in rotating machinery protection networks, the Bently Nevada 330105-02-12-05-02-05 (330105-02-12-05-02-05 Proximity Probe) provides direct physical execution of eddy-current signal sensing.

Model Suffix Breakdown

• 330105: 3300 XL 8 mm Proximity Probe

• 02: Unthreaded length (20 mm)

• 12: Overall case length (120 mm)

• 05: Total length (0.5 m)

• 02: Connector type (Miniature coaxial)

• 05: Agency approval (Multiple approvals)

Hardware Specifications

Mechanical Monitoring and Rotor Dynamics

Eddy-current probe scaling accuracy is required for the linearity of the vibration signal. Precise gap voltage validation at -10 VDC targets is necessary during commissioning to ensure the sensor response remains within the calibrated linear range. Cross-talk suppression must be enforced by maintaining proper physical separation between adjacent probes to prevent electromagnetic interference from the high-frequency oscillator. Rotor dynamics analysis depends on the stability of the signal path from the probe tip to the interface.

Ordering info

• 1 unit 330105-02-12-05-02-05 Proximity Probe

• 1 set protective connector dust caps

• 1 technical installation manual

Installation Requirements

• Mounting: Install the probe into a rigid bracket to maintain a stable air gap during operation. Torque jam nuts to prevent mechanical shifting.

• Grounding: Ensure electrical isolation between the probe housing and machine structure, unless system design dictates otherwise.

• Cable Routing: Route coaxial cabling through dedicated metallic conduit, isolated from high-current power lines to minimize induced noise.

• Gap Setting: Calibrate the air gap using a precision feeler gauge. Verify output voltage at the proximitor terminal confirms centering in the linear range.

Frequently Asked Questions

• Is this probe compatible with standard 3300 XL extension cables?

  Yes, the 330105 probe is designed to integrate with 3300 XL extension cables, provided the system length remains consistent with the calibrated proximitor setup.

• What is the standard target material?

  Factory calibration is optimized for AISI 4140 steel. Variations in target material magnetic properties require an adjustment to the sensitivity factor.

• Can this probe be used in hazardous locations?

  The 05 suffix indicates support for multiple agency approvals. Verify current certification markings against site-specific hazardous area requirements.

• What is the maximum operating temperature?

  The probe is rated for operation up to 177 deg C. Exceeding this temperature limit can damage internal coil potting and compromise measurement integrity.

• Are the connector pins field-replaceable?

  No, connectors are factory-swaged. Mechanical damage to the connector requires replacement of the entire probe and cable assembly.

• How can probe functionality be validated?

  Monitor gap voltage at the proximitor terminal. Signals outside the expected operating range indicate potential sensor or cable failure.

• Does the probe tip require protection?

  The tip is hardened, but not designed for physical contact with rotating targets. Maintain the specified air gap to prevent damage.

• Does the probe require periodic maintenance?

  The probe is a sealed solid-state component. Maintenance is limited to inspecting the cable integrity and connector cleanliness.