The Bently Nevada 330905-00-12-10-02-05, also cataloged as the 3300 NSv Proximity Probe, operates as a dedicated hardware component for non-contacting vibration and displacement measurements within the 3300 NSv Proximity Transducer System.

Model Matrix Breakdown

• 330905: 3300 NSv Proximity Probe, 1/4-28 UNF thread, without armor.

• 00: Unthreaded Length option (0.0 in).

• 12: Overall Case Length option (1.2 in).

• 10: Total Length option (1.0 meter).

• 02: Connector option (Miniature coaxial ClickLoc connector, standard cable).

• 05: Agency Approval option (Multiple Options: CSA, ATEX, IECEx approvals for hazardous areas).

Hardware Specifications

Eddy-Current Scaling and Gap Voltage Validation

The 3300 NSv Proximity Probe utilizes eddy-current technology optimized for tight clearance installations and small target diameters. Proper system operation requires gap voltage validation to ensure the probe operates within its linear range. A nominal gap voltage of -10 VDC targets the midpoint of the linear calibration curve when measuring standard AISI 4140 steel. Cross-talk suppression is integrated into the probe tip geometry to permit close mechanical mounting intervals without inductive interference from adjacent probes or structural components. The sensor dynamics allow precise tracking of high-frequency rotor vibrations and axial shaft positioning.

Frequently Asked Questions

Q: Can this 1.0-meter probe be extended directly using any standard extension cable?

A: No. The total electrical length of the probe and extension cable must match the required input length of the 3300 NSv Proximitor Sensor, which is typically 5.0 meters or 7.0 meters. Mismatching the total system length degrades the scale factor calibration.

Q: What is the physical clearance required to prevent side-viewing cross-talk or false targets?

A: The probe tip requires a minimum clear zone of counterbore diameter to prevent interference from surrounding metal. Maintaining a clearance of at least three times the probe tip diameter from adjacent conducting materials is standard engineering practice.

Field Installation Guidelines

• Mechanical Torquing: When installing the 1/4-28 UNF threaded case, do not exceed the maximum allowable torque of 3.4 N-m (30 in-lb) to prevent structural damage to the probe tip and case assembly.

• Coaxial Connector Inspection: Ensure the ClickLoc coaxial connectors are clean and dry prior to mating. Do not use tools to tighten the connectors; hand-tighten until the tactile click is felt.

• Cable Routing and Shielding: Route the probe lead-in cable through dedicated conduit or cable trays. The coaxial outer shield must be isolated from structural ground along the run and terminated exclusively at the Proximitor Sensor housing ground terminal.

• Thread Engagement: Ensure a minimum of five full threads of engagement into the mounting bracket or machine housing to guarantee structural stability against rotor dynamics and casing vibration.