The Bently Nevada 330105-02-12-10-02-05 serves as the primary 330105 Proximity Probe utilized to execute non-contact shaft vibration and position displacement measurements across 3300 XL Transducer System platforms. Operating via high-frequency eddy-current generation, the hardware tracks static and dynamic surface distance changes relative to an 8 mm unshielded tip. The sensor interfaces directly with a matching Proximitor module to deliver linear voltage modulation without physical contact with the rotating shaft.

Option Codes & Structural Matrix

• 330105: Base model designation for 3300 XL 8 mm proximity probe configuration with standard 3/8-24 UNF-2A casing threads.

• 02: Unthreaded length option mapping to a 0.2 inch smooth, unthreaded outer body section.

• 12: Overall case length option mapping to a 1.2 inch total threaded plus unthreaded shell length.

• 10: Total cable length option specifying a 1.0 meter (3.3 feet) integrated coaxial line.

• 02: Miniature coaxial ClickLoc connector configuration lacking an integrated connector protector sleeve.

• 05: Agency approval option indicating international certifications including CSA, ATEX, and IECEx intrinsic safety and non-incendive approvals.

Hardware Specifications

Eddy-Current Probe Scaling & Cross-Talk Suppression

The probe coil is engineered to establish strict eddy-current probe scaling baselines when paired with an active Proximitor circuit. Field calibration tracking relies on accurate gap voltage validation, requiring the physical positioning to hit a targeted -10 VDC center-point voltage, which marks the exact midpoint of the 80 mil measurement span.

The tip coil architecture incorporates specialized winding methods to ensure cross-talk suppression. This mitigates radio frequency field overlapping when multiple 3300 XL sensors are mounted together inside tight clearances for orthogonal X-Y radial vibration analysis or redundant thrust positioning, preserving signal fidelity across demanding rotor dynamics transitions.

Ordering & Shipment Contents

• 1 Bently Nevada 330105-02-12-10-02-05 proximity probe with integral 1.0 meter low-loss cable.

• 1 Factory-crimped miniature coaxial ClickLoc plug connector.

• 1 External hex locknut matched to the 3/8-24 UNF casing thread.

Installation & Wiring Framework

• Mechanical Torquing Limits: Tighten the 3/8-24 UNF case to a standard value of 4.5 N-m (40 in-lbf). Do not exceed a maximum limit of 13.6 N-m (120 in-lbf) to prevent structural casing distortion or internal wiring shear.

• Conduit Routing Regulations: Route all integral 1.0 meter lines inside dedicated, separate grounded metallic conduits to shield the high-frequency measurement loop from variable frequency drive or motor power lines.

• Physical Bend Constraints: Maintain a strict minimum physical bend radius of 25.4 mm (1.0 inch) across all sections of the coaxial cable to avoid structural damage or signal impedance shifts.

Technical Performance FAQ

• What specific gap voltage validation target is required during sensor commissioning?

  The probe position must be mechanically adjusted until the Proximitor loop monitors a stable baseline gap voltage of -10 VDC, centering the operational state in the linear region.

• Can this proximity probe be hot-swapped while the Proximitor sensor is energized?

  Yes, the sensor is completely passive and allows hot-swap actions. Disconnecting the coaxial line drives the output to saturation but causes no damage to the electronics.

• What total system length extension cable must be paired with this 1.0 meter probe?

  A 1.0 meter probe requires matching with a 4.0 meter extension cable to reach the 5.0 meter total loop length required by standard 5 meter Proximitor sensors.

• How do non-magnetic or alternate shaft metallurgies affect the eddy-current probe scaling?

  Alternative shaft materials alter the magnetic reluctance, shifting the scale factor away from the native 200 mV/mil specification and requiring system recalibration.

• What is the mechanical function of the 02 unthreaded length parameter?

  The 0.2 inch unthreaded section prevents the probe threads from binding against the internal sleeve entry wall, allowing clean positioning adjustments.

• What physical issues occur if the maximum installation torque of 13.6 N-m is exceeded?

  Excessive torque deforms the stainless steel body casing, leading to fractured solder joints inside the core coil winding or coaxial junction.

• Does the 05 option suffix modify the physical design or electrical properties of the probe tip?

  No, the 05 suffix indicates international regulatory approvals for hazardous zones. The underlying physical and electrical tracking characteristics remain identical.

• What happens to the measurement loop if the coaxial cable is bent past the 25.4 mm limit?

  Bending past the limit creates mechanical stress that alters the characteristic coaxial impedance, inducing measurement noise or localized calibration drift errors.