Configured for non-contacting vibration and position measurement in rotating machinery, the Bently Nevada 330104-00-06-05-01-00 (330104 Proximity Probe) provides direct physical signal execution via eddy-current sensing. This device converts target displacement into a proportional electrical output for downstream monitor interface modules.

Suffix Breakdown & Model Matrix

• 330104: 8 mm Proximity Probe, Reverse Mount

• 00: Unthreaded Length (0 mm)

• 06: Overall Case Length (60 mm)

• 05: Total Length (0.5 meter)

• 01: Connector Type (Miniature coaxial ClickLoc connector, no connector protector)

• 00: Agency Approval (Not required)

Hardware Specifications

Mechanical Monitoring & Eddy-Current Scaling

The 3300 XL system relies on precise eddy-current probe scaling to ensure linear displacement measurements. To validate system integrity, the gap voltage must be tuned to a -10 VDC target during static machine conditions. Proper rotor dynamics analysis depends on signal purity; therefore, cross-talk suppression is managed by the integrated Proximitor sensor electronics to prevent signal modulation from adjacent proximity probes. Shielding and grounding must be strictly observed to maintain a low-noise floor in high-speed rotating equipment environments.

Ordering Information

• 1 Bently Nevada 330104 8 mm Reverse Mount Probe

• 1 Jam nut for mounting

• 1 Installation manual

Field Installation Guidelines

• Mounting Orientation: Reverse mount probes are designed for internal machine case installation with the connector accessible from the exterior.

• Torque Specifications: Tighten the jam nut to 5.6 N-m; excessive torque may deform the probe housing or damage the mounting threads.

• Gap Setting: Verify the sensor tip is positioned at a 1.27 mm nominal gap from the target surface.

• Cable Management: Utilize proper cable ties to secure the coaxial lead; ensure a minimum 25 mm bend radius to maintain cable impedance.

Frequently Asked Questions

• Does this probe require a specific Proximitor sensor?

  Yes, this 0.5 meter probe must be matched with a 3300 XL Proximitor sensor calibrated for a total system length of 0.5 meters.

• Can I replace the probe connector in the field?

  No. The ClickLoc connector is factory-molded to the coaxial cable to ensure environmental sealing and impedance consistency.

• What is the purpose of the reverse mount design?

  It allows the sensor to be installed through the machine case, keeping the connector on the atmospheric side of the bearing housing.

• Can the probe be used on non-ferrous targets?

  No. The calibration is specific to AISI 4140 steel; using other metals will require a recalculation of sensitivity and linear range.

• Why is the gap voltage critical?

  The gap voltage confirms the physical distance between the probe and target; operating outside the linear range causes signal clipping.

• How do I prevent signal interference?

  Maintain separation between probes and ensure all cable shields are grounded correctly at the monitor end only.

• Is the probe tip affected by high pressure?

  The probe is designed to withstand typical internal machine case pressures but must be verified for the specific application environment.

• Can I perform a hot-swap of the probe?

  Disconnecting the probe while the system is powered will result in an "OK" signal failure on the monitoring instrumentation.