The Bently Nevada 330905-00-03-10-02-00, also cataloged as the 330905 3300 NSv Proximity Probe, operates as a dedicated hardware component for non-contact vibration and position measurements on small-diameter shafts within 3300 NSv monitoring system platforms.

Model Suffix Matrix

The 330905 NSv transducer utilizes a 5 mm probe tip diameter designed for restricted spatial requirements. The part number configuration is:

• 00: Unthreaded length (0.0 inches).

• 03: Overall case length (0.3 inches).

• 10: Total cable length (1.0 meter).

• 02: Connector option (Miniature coaxial ClickLoc).

• 00: Agency approval (None).

Hardware Specifications

Mechanical Monitoring & TSI Technical Attributes

This NSv transducer system employs eddy-current probe scaling to convert target surface displacement into a voltage signal. Monitoring accuracy relies on precise gap voltage validation, typically targeting -10 VDC at the associated Proximitor output for linear measurement. The system is calibrated for AISI 4140 steel, and deviation from this target material necessitates site-specific sensitivity adjustments. To maintain rotor dynamics data integrity, installations must account for side-viewing effects by strictly adhering to specified counterbore clearances, thereby ensuring cross-talk suppression in high-density sensor arrays.

Ordering info

• 1 x 330905-00-03-10-02-00 5 mm Proximity Probe

• 1 x M10 x 1 stainless steel lock nut

• 1 x Protective connector boot set

Field Installation Guidelines

• Mechanical Torque:

  Mounting nuts must be secured to a maximum torque of 13.5 N·m (120 in-lb). Excessive force may compromise the probe body thread integrity.

• Coaxial Routing:

  Use grounded rigid metal conduits for cable runs to mitigate electromagnetic noise and capacitive signal coupling.

• Connector Engagement:

  The ClickLoc connector requires manual seating until an audible click occurs. Tools must not be used to apply tightening force to the connector assembly.

• Thermal Protection:

  Ensure the probe tip remains within the -35 deg C to +177 deg C thermal envelope to prevent insulation breakdown or transducer drift.

Frequently Asked Questions

• Is this probe compatible with standard 3300 XL Proximitor sensors?

  No. The 330905 NSv probe requires the specific NSv Proximitor to maintain the calibrated scale factor and linear range characteristics.

• How does the NSv tip diameter affect measurement?

  The 5 mm tip is optimized to reduce side-viewing errors on small-diameter shafts, providing more accurate vibration data compared to 8 mm probes.

• What is the consequence of incorrect gap voltage?

  Operating outside the linear range results in signal clipping or distortion, leading to inaccurate vibration readings and potential monitor system alarms.

• Can the coaxial cable be shortened?

  No. The cable is a fixed length and is part of the calibrated transducer system. Modification alters electrical impedance and invalidates system accuracy.

• Is the probe tip sensitive to target material?

  Yes. Factory calibration is optimized for AISI 4140 steel. Alternative target metals require specific recalibration to maintain the 7.87 V/mm sensitivity.

• Does this probe support hazardous area installation?

  The -00 suffix denotes the absence of agency approvals. Use approved models if the installation environment is classified as hazardous.

• How is the probe gap verified during operation?

  Verification involves measuring the DC gap voltage at the monitor or Proximitor interface while the machine is at a known steady-state condition.

• Can this unit be removed during machine operation?

  Physical removal is possible, but this will result in a loss of signal and likely trigger alarms in the monitoring system. Bypass logic accordingly.