Configured for radial vibration and axial position measurement in rotating machinery systems, the Bently Nevada 330905-08-13-10-12-05 (330905-08-13-10-12-05 NSv Proximity Probe) provides direct physical monitoring through high-frequency inductive coupling.

Model Identification

The model number 330905-08-13-10-12-05 denotes specific configuration parameters including physical thread dimensions, cable length, and connector types established by the Bently Nevada NSv series coding standard for small-target applications.

Hardware Specifications

TSI Eddy-Current Performance Characteristics

The NSv probe system operates on an 8 MHz carrier frequency, optimized for smaller shaft diameters where standard 3300 XL probes lack sufficient linear range. Precise gap voltage validation is required to ensure operation within the linear range of the transducer. The probe-to-target alignment must be perpendicular to the shaft centerline to prevent signal distortion. Cross-talk suppression is maintained by adhering to minimum spacing requirements between adjacent probes, preventing interference from the high-frequency excitation field.

Ordering Information

• Single NSv Proximity Probe unit per order.

• Includes attached coaxial cable with standard VibeLock connector.

• Calibration certificate provided for specific linearity and scale factor.

• Mounting hardware (locknuts) provided separately.

Installation Protocols

• Mechanical Mounting: Ensure probe thread engagement does not exceed the depth limits of the housing to prevent contact with the target.

• Torque Specifications: Use specified wrench torque for locknuts to ensure long-term stability against vibration-induced loosening.

• Shielding: Ensure the coaxial shield is continuous and grounded only at the proximitor end to prevent ground loops.

• Cable Routing: Avoid high-voltage conduit runs to minimize EMI coupling into the low-level signal path.

Technical FAQ

• Q: Is the 330905-08-13-10-12-05 compatible with 3300 XL proximitors?

  A: No. The NSv probe requires the specific NSv Proximitor, as the carrier frequency and signal conditioning differ from standard 3300 XL components.

• Q: Does this probe support reverse mounting?

  A: Mechanical mounting must follow the thread orientation specified for the application to ensure the target remains within the probe linear range.

• Q: What is the impact of painting the probe tip?

  A: Any non-conductive or conductive coating on the probe tip will alter the inductance characteristics and invalidate the calibration curve.

• Q: Can I shorten the integral cable?

  A: The cable is part of the tuned resonant circuit. Shortening or splicing the integral cable will alter system gain and phase response.

• Q: How is the probe sensitivity defined?

  A: Sensitivity is defined by the change in voltage per unit change in gap distance, typically expressed in V/mm or mV/mil.

• Q: Does the probe require an external power supply?

  A: The probe is passive; power is supplied by the associated NSv Proximitor sensor at 12 VDC.

• Q: How does the probe react to high-temperature gradients?

  A: The internal coil assembly is compensated for thermal drift, but rapid thermal cycling should be avoided to prevent mechanical stress on the probe tip.

• Q: What indicates a probe failure?

  A: A gap voltage reading outside the normal range (e.g., near supply voltage or zero) typically indicates a cable break or short-to-ground.