Bently Nevada 330905‑00‑12‑05‑02‑05 — 3300‑XL NSv Eddy‑Current Proximity Probe

Description

Bently Nevada 330905‑00‑12‑05‑02‑05 — 3300‑XL NSv Eddy‑Current Proximity Probe

Product Overview

The 330905‑00‑12‑05‑02‑05 belongs to Bently Nevada 3300‑XL NSv proximity transducer family. It is a full‑thread eddy‑current proximity probe optimized for small‑diameter shafts and constrained counter‑bore installation spaces. The probe converts physical gap variation between probe tip and metallic target into impedance signals, which are conditioned by matching NSv‑series proximitor. Compliant with API 670, it performs radial vibration, thrust‑position and Keyphasor measurements on compressors, turbines and other critical rotating assets.

Critical Compatibility Warning

• Only works with NSv‑series hardware: 330980‑xx‑05 proximitor and 330930‑xx‑xx‑00 NSv extension cables.
• NOT interchangeable with standard 3300‑XL 8 mm /11 mm probes, extension cables or proximitors.
• Total system cable length = probe integral pigtail + NSv extension cable, must exactly match the rated total‑system length of the NSv proximitor. Gap‑voltage output connects to 3500/42M or 3300 monitor racks for alarm, trip and trending.

Part Number Decoding

• 330905: 3300‑XL NSv proximity probe
• ‑00: Full‑thread probe body (0 mm unthreaded segment)
• ‑12: Overall case length =12 mm
• ‑05: Integral pigtail cable length =0.5 m
• ‑02: ClickLoc miniature coaxial connector (non‑Microdot)
• ‑05: Multi‑agency hazardous‑area certifications (ATEX / IECEx / CSA / CE)

330905-00-12-05-02-05

Key Specifications

Main Features

• API‑670 compliant NSv full‑thread probe: Enhanced small‑target and side‑view performance for shafts less than 51 mm diameter.
• Short 12  mm M10×1 full‑thread body: Designed for shallow counter‑bore and space‑limited installation envelopes.
• 0.5  m short integral pigtail: Flexible field routing; NSv extension cable is mandatory to complete required system length.
• 1.5  mm linear measuring range: Compact working stroke, requires precise mechanical gap adjustment.
• Extended operating temperature ‑52 °C ~ +177 °C: Suitable for low‑temperature refrigeration compressors and high‑temperature casing environments with oil‑mist exposure.
• Stainless‑steel robust mechanical construction: High resistance to vibration and mechanical shock for continuous turbomachinery service.
• ClickLoc dedicated miniature coaxial interface: Mates exclusively with 330930 NSv extension cables; cannot connect to Microdot‑type standard‑XL cables.
• Multi‑agency intrinsic‑safety certification: Valid for hazardous classified zones when deployed within complete certified NSv transducer loop.

Typical Application Scenarios

• Centrifugal process‑gas, air and refrigeration compressors with small‑diameter shafts and confined mounting bores
• Rotating machinery with small thrust target surfaces where standard 3300‑XL probes produce large measuring errors
• Equipment with mechanical obstructions causing side‑view measurement conditions
• Steam / gas turbine auxiliary machinery and critical gearbox condition monitoring
• Off‑shore platform rotating‑machinery protection systems
• Hazardous classified locations requiring ATEX / IECEx / CSA intrinsic‑safety compliance
• Spare‑part replacement for existing NSv proximity measurement loops

Related & Recommended Alternative Models

Compatible Components & Accessories

1. NSv extension cables: 330930‑xx‑xx‑00 ClickLoc extension cables. Total system length = probe 0.5 m + NSv extension cable = NSv proximitor rated total length. Do not use standard 330130‑xx‑xx‑00 Microdot cables.
2. Matched NSv proximitor: 330980‑xx‑05 DIN‑rail NSv proximitor sensor.
3. Monitor hardware: Bently 3500/42M, 3300/12, 3300/15 monitor racks.
4. Mounting parts: M10×1 lock‑nut for NSv probe fixation.
5. Calibration fixture: NSv‑compatible static gap calibration rig for pre‑commission performance validation.
6. Torque tool: For correct ClickLoc connector assembly torque.

Installation and Configuration Guide

Warning: Installation must be performed by qualified instrumentation technicians. Always refer to original Bently Nevada 3300‑XL NSv official manual as primary reference document.

1. Mechanical Probe Mounting
   • Thread the M10×1 full‑thread probe into casing counter‑bore; install lock‑nut for position locking after gap adjustment.
   • Maintain probe tip perpendicular to metallic target surface; angular misalignment deteriorates small‑target measurement accuracy.
   • Guarantee sufficient mechanical clearance to avoid probe‑to‑rotor collision under full shaft operating excursion. Remember NSv linear range is only 1.5 mm, operating gap window is narrower than standard 8 mm probes.
2. System‑Length Verification
   • Probe integral pigtail =0.5 m. Select proper NSv‑type extension cable, ensure total cable length matches NSv proximitor rated total‑system length.
   • Apply manufacturer‑specified torque to ClickLoc connector. Never connect or disconnect transducer loop while proximitor power is ON.
3. Signal Cable Routing Requirements
   • Route NSv coaxial signal cables separately from high‑power AC, contactor and VFD wiring to suppress EMI noise.
   • Follow minimum coaxial‑cable bending radius; avoid sharp kinks that damage internal conductors.
4. Commissioning Gap Adjustment
   • Loosen lock‑nut, adjust probe penetration to set mechanical gap between tip and shaft target.
   • Power up NSv proximitor, measure DC gap‑voltage with high‑impedance multimeter. Set working point near mid‑range (approx.‑10 VDC for AISI‑4140 steel).
   • Tighten lock‑nut securely, re‑check gap‑voltage to confirm no mechanical shift. Keep operating point within NSv linear zone (‑2 VDC ~ ‑14 VDC).
5. Monitor Channel Setup
   • Input gap‑voltage signal to monitor channel, configure scale factor to 7.87 V/mm (200 mV/mil) for NSv system.
   • Set Alert / Danger alarm thresholds per machine OEM specifications.
   • Perform loop fault test: simulate probe open‑circuit to verify Not‑OK diagnostic function activates correctly.
6. Maintenance & Troubleshooting
   • Inspect ClickLoc connector for dirt, corrosion and loose contact during machinery turnaround.
   • Track DC gap‑voltage drift as health indicator of full NSv transducer chain.
   • For Not‑OK fault status: check probe‑tip damage, cable insulation failure or connector degradation. NSv probe is non‑field‑repairable; replace complete probe assembly upon hardware failure.
7. Hazardous‑Area Installation Notes
   • For ATEX / IECEx classified‑zone deployment, strictly comply with NSv intrinsic‑safety requirements for power supply, cable specification, shielding and chassis grounding.

Supplementary Remark

330905‑00‑12‑05‑02‑05 is 3300‑XL NSv full‑thread proximity probe with 12 mm case length, 0.5 m integral pigtail and ClickLoc connector. It delivers superior small‑target performance with reduced 1.5 mm linear range. It must be paired exclusively with NSv‑series proximitor and NSv extension cables; incompatible with standard 3300‑XL 8 mm /11 mm transducer components. Before commissioning, cross‑verify part‑number configuration, M10×1 full‑thread dimension, pigtail length, ClickLoc connector and total‑system cable length against project BOM and mechanical drawings.