Bently Nevada 330905-00-03-10-02-00 3300 XL 8mm Proximity Sensor

Configured for precision displacement measurement in restricted installation envelopes, the Bently Nevada 330905-00-03-10-02-00 (330905 Proximity Sensor) provides direct physical signal transduction via eddy-current induction across machinery monitoring platforms.

Suffix Breakdown & Model Matrix

• 330905: Base Model (3300 XL 8mm Proximity Sensor)
• -00: Unthreaded Length (0 mm)
• -03: Overall Case Length (30 mm)
• -10: Total Length (1.0 meter)
• -02: Connector and Cable-Type (Miniature coaxial ClickLoc connector, standard cable)
• -00: Agency Approval (Not required)

Hardware Specifications

Mechanical Monitoring & TSI Characteristics

The 3300 XL system relies on eddy-current probe scaling to convert target distance into a linear voltage output. For accurate rotor dynamics acquisition, operators must perform a gap voltage validation during commissioning, targeting a -10 VDC nominal center-gap reading. This adjustment centers the transducer within its linear measurement range. Maintaining the integrity of the 75 ohm coaxial path is necessary to avoid signal degradation. Cross-talk suppression should be managed by ensuring cable shielding remains continuous and is properly bonded to the system common at the Proximitor interface, preventing external electromagnetic noise from influencing the vibration orbit data.

Frequently Asked Questions

Q: Can the 330905 sensor be interchanged with other cable lengths without recalibration?

A: No. The 3300 XL system components are calibrated as a matched set (probe, extension cable, and Proximitor sensor). Changing the total system length alters the impedance and capacitance of the signal path, necessitating system-wide recalibration to maintain measurement accuracy.

Q: How should the ClickLoc connector be maintained to prevent signal drift?

A: Ensure the connection is fully seated to maintain constant 75 ohm impedance. The interface must be free of moisture, oil, and metallic contaminants. Avoid mechanical strain on the connector interface, as intermittent connections can appear as transducer faults or erroneous spikes in the monitoring system.

Field Installation Guidelines

• Mounting Rigidity: Mount the sensor in a stable, non-resonant bracket. Any mechanical deflection of the bracket relative to the observed shaft will be interpreted as shaft displacement, inducing error in the vibration data.
• Shielding Continuity: Maintain shield continuity from the sensor tip to the monitoring equipment. Avoid crushing or pinching the FEP-insulated coaxial cable, as deformation of the cable geometry alters its characteristic impedance.
• Gap Adjustment: Before securing the probe with locking nuts, rotate the sensor body to adjust the air gap. Monitor the Proximitor output with a high-impedance digital multimeter, targeting -10 VDC at the specified nominal center-gap.
• Cable Routing: Route coaxial leads through dedicated, grounded conduits away from high-voltage power lines to prevent EMI injection. Adhere to the minimum bend radius requirements for the specific cable type to ensure long-term signal stability.