Configured for high-precision displacement sensing in compact mechanical envelopes, the Bently Nevada 330905-00-05-10-12-CN (330905 Proximity Probe) provides direct physical signal transduction of rotor position and vibration within confined radial clearances.

Suffix Breakdown and Configuration

The 330905-00-05-10-12-CN identifies the following physical and mechanical parameters:

• 00: M10 x 1 threaded probe, without armor.

• 05: Minimum unthreaded length of 0 mm and minimum case length of 50 mm.

• 10: 1.0 meter (39 in) integral cable length.

• 12: Miniature coaxial ClickLoc connector with FluidLoc cable.

• CN: CSA, ATEX, and IECEx agency approval rating.

Hardware Specifications

Rotor Dynamics and Signal Conditioning

The 3300 NSv system is optimized for small-diameter shafts where standard probe geometry is physically incompatible. Accurate rotor dynamics analysis depends on precise eddy-current probe scaling to ensure linear output. During installation, users must conduct gap voltage validation to target -10 VDC at the Proximitor output, which establishes the required reference for linear operation. The integrated FluidLoc cable design effectively prevents oil or other process fluid migration through the cable assembly, while advanced cross-talk suppression ensures signal clarity when multiple sensors are installed in close proximity.

Ordering Information

• 1 x 330905-00-05-10-12-CN Proximity Probe.

• 1 x Installation hardware kit (mounting nuts included).

• 1 x Regulatory compliance documentation.

Field Installation Guidelines

• Probe Mounting

• Thread the probe into the mounting hole until the target gap is reached.

• Adjust the gap until the Proximitor output reaches the nominal -10 VDC.

• Secure the probe position with the provided locknuts to prevent vibration-induced movement.

• Cable Routing

• Ensure the FluidLoc cable is not kinked or subjected to sharp bends during installation.

• Connect the ClickLoc miniature coaxial connector securely, ensuring a firm audible click.

• Ground the cable shield only at the monitoring rack to avoid ground loops.

Frequently Asked Questions

• What is the purpose of the FluidLoc cable?

  FluidLoc cable incorporates a specialized seal that prevents process fluids, such as oil or water, from traveling through the internal cable structure to the probe connector.

• Can this probe be used in hazardous locations?

  The CN suffix indicates the probe has obtained CSA, ATEX, and IECEx approvals for safe operation in specified hazardous area environments.

• What is the significance of the 3300 NSv platform?

  The NSv (Non-Standard velocity) platform is specifically designed for small-diameter shafts and limited-space applications where standard Bently Nevada 3300 probes cannot fit.

• How do I verify signal integrity?

  Verify integrity by monitoring the gap voltage at the Proximitor sensor output and ensuring the signal remains stable and within the expected range for the given gap distance.

• Is the probe field-repairable?

  No, the transducer assembly is a factory-calibrated, sealed unit. Any attempt to repair the probe or cable assembly will void calibration and system accuracy.

• Can I shorten the 1.0 meter integral cable?

  No, the system is calibrated as a matched set. Altering the cable length changes the electrical characteristics of the loop and invalidates the system calibration.

• What is the thermal operating range?

  The probe is rated for extreme environments, from -52 deg C up to +177 deg C, suitable for most high-temperature machinery housings.

• Does this probe require a specific Proximitor?

  Yes, it must be paired with an NSv-compatible Proximitor, as standard Proximitor units are calibrated for different transducer resonant frequencies.