Bently Nevada 330105‑02‑12‑05‑02‑05 3300‑XL 8 mm Reverse‑Mount Eddy‑Current Proximity Probe (Multi‑Hazardous‑Area Approvals Variant)

Description

Bently Nevada 330105‑02‑12‑05‑02‑05 3300‑XL 8 mm Reverse‑Mount Eddy‑Current Proximity Probe (Multi‑Hazardous‑Area Approvals Variant)

Product Overview

The 330105‑02‑12‑05‑02‑05 is a reverse‑mount eddy‑current proximity probe within Bently Nevada 3300‑XL 8 mm NSv transducer family. Reverse‑mount configuration enables installation from the rear side of machine housing, allowing probe gap adjustment or replacement without machine disassembly. Equipped with miniature ClickLoc coaxial connector, this non‑armored probe delivers linear voltage output proportional to shaft‑to‑probe clearance. It performs static shaft position/thrust measurement and dynamic shaft relative‑vibration monitoring, also supports Keyphasor phase reference and rotational speed detection, fully complying with API‑670 turbomachinery protection standards. The final suffix ‑05 stands for multi‑agency hazardous‑area certifications including ATEX, IECEx and CSA for explosive‑zone deployment.

Critical Compatibility Warning

• Belongs to 3300‑XL NSv ClickLoc transducer ecosystem. NOT compatible with legacy Microdot‑style 3300‑XL hardware (330130 series). Must pair with NSv‑type extension cables (330930‑xx‑xx‑xx‑xx) and NSv‑compatible proximitor sensors or 990‑NSv transmitters.
• Total calibrated transducer length = probe integral pigtail length (0.5 m) + paired NSv extension cable length. The sum must strictly match the calibrated length setting of proximitor / transmitter; length mismatch will produce scale‑factor deviation and measurement inaccuracy.
• Connector: Miniature ClickLoc™ quick‑lock coaxial interface. Do not splice, cut or modify factory‑molded probe‑cable assembly. Always verify physical label intrinsic‑safety rating before hazardous‑area installation.

Part Number Decoding

• 330105：3300‑XL 8 mm reverse‑mount proximity probe base model
• ‑02：Mounting thread: 3/8‑24 UNF
• ‑12：Probe housing overall length: 120 mm
• ‑05：Integral pigtail cable length: 0.5 meter
• ‑02：Connector type: Miniature ClickLoc coaxial connector
• ‑05：Agency approval option: ATEX / IECEx / CSA multi‑hazardous‑area certifications

330105-02-12-05-02-05

Key Specifications

Critical note: Reverse‑mount installation requires matching reverse‑mount probe housing assembly. Improper housing installation will degrade vibration immunity and measurement precision. Never splice factory‑integral probe pigtail cable. ClickLoc connector is finger‑tight locking type; wrench torque is forbidden.

Main Features

• Reverse‑mount mechanical design: Serviceable from machine housing rear side; probe gap adjustment or replacement without disassembling turbomachinery casing, greatly simplifies overhaul work
• 3/8‑24 UNF thread & 120 mm housing: Standard mechanical interface for reverse‑mount probe shell assemblies, widely adopted for turbomachinery bearing‑housing installation.
• Miniature ClickLoc quick‑lock connector: Vibration‑resistant finger‑click locking structure, gold‑plated contacts resist oil‑mist corrosion, prevents loose connection under continuous machine vibration.
• 0.5 m factory‑calibrated non‑armored integral pigtail: Modular segment for building total NSv transducer loop length together with 330930 series NSv extension cables.
• Multi‑agency hazardous‑area approvals (‑05 suffix): ATEX / IECEx / CSA certification set, suitable for petrochemical, refinery and oil‑gas classified explosive‑zone sites.
• Excellent temperature stability & linearity: API‑670 compliant performance, ensures reliable long‑term shaft‑displacement monitoring for critical rotating equipment.
• Full interoperability inside 3300‑XL NSv ClickLoc transducer family.

Typical Application Scenarios

• Shaft‑relative radial‑vibration and axial thrust‑position protection monitoring for steam turbines, gas turbines and centrifugal compressors with reverse‑mount probe housing structure
• Keyphasor phase reference and shaft rotational‑speed measurement on large fluid‑film‑bearing rotating machinery
• Refinery, petrochemical and power‑plant projects requiring ATEX/IECEx hazardous‑area certified NSv proximity transducer components
• New‑project deployment with Bently Nevada 3500 rack NSv‑compatible monitor channels
• Overhaul spare‑part replacement for existing reverse‑mount NSv proximity‑measurement loops

Related & Recommended Alternative Models

Compatible Components & Accessories

1. NSv Extension Cables: 330930‑xx‑xx‑xx‑xx series ClickLoc extension cables
2. Monitoring Hardware: NSv‑type proximitor sensors, 990‑series NSv transmitters, Bently Nevada 3500 rack NSv‑compatible monitor modules
3. Mechanical Accessories: Reverse‑mount probe housing assembly, 43501‑02‑04‑02 low‑pressure cable‑seal assembly, 43574‑04 multi‑hole grommet
4. Installation Consumables: Cable clamps for strain‑relief, high‑temperature cable ties, anti‑seize compound for mounting threads
5. Calibration Tool: 8 mm NSv static gap calibration fixture

Installation and Configuration Guide

Warning: Installation must be performed by qualified instrument technicians. Always refer to original Bently Nevada 3300‑XL NSv transducer‑system manual as primary reference. Verify intrinsic‑safety marking before deployment in explosive classified hazardous zones.

1. Pre‑installation Total‑Length Calculation
   • Calculate total NSv transducer length = probe integral pigtail (0.5 m) + selected NSv extension‑cable length.
   • Confirm total length strictly matches calibrated‑length requirement of paired proximitor or 990‑NSv transmitter. Length mismatch causes scale‑factor error.
2. Reverse‑Mount Mechanical Installation
   • Install matching reverse‑mount probe housing assembly onto machine bearing housing first.
   • Apply anti‑seize compound to 3/8‑24 UNF probe thread; insert probe from housing rear side, adjust working gap to target value, lock probe lock‑nut to specified torque.
   • Confirm probe tip does not collide with rotating shaft surface.
3. Cable Routing & ClickLoc Connector Mating
   • Route NSv transducer cable separately from high‑power AC, VFD and contactor wiring to minimize EMI noise interference.
   • Observe minimum cable static bending radius requirement; avoid sharp kinks. Do not pull cable assembly by ClickLoc connector body.
   • Align ClickLoc connector key‑slot, push‑in and twist clockwise until audible “click” for finger‑tight locking. Do not apply wrench torque.
   • Mount strain‑relief clamps nearby connector to eliminate mechanical tension transferred onto ClickLoc joint. Where cable penetrates machine casing, deploy approved cable‑seal fitting.
4. System Commissioning
   • Complete full NSv transducer‑loop assembly and power‑up proximitor / monitoring rack.
   • Read static gap voltage to verify mechanical gap setting. Perform static‑gap calibration test with NSv 8 mm calibration fixture to validate system scale‑factor.
   • Confirm Not‑OK fault status clears after proper installation and gap adjustment. Configure monitor alarm / trip thresholds according to project machinery specification.
5. Maintenance & Troubleshooting
   • During machinery turnaround, inspect reverse‑mount probe locking status, ClickLoc connector for oil contamination / corrosion; check cable outer jacket for cracking or abrasion damage.
   • Abnormal gap‑voltage drift, high noise or persistent Not‑OK faults may indicate loose ClickLoc lock, mechanical gap shift, cable damage or wrong total transducer‑loop length.
   • If probe or integral‑pigtail suffers damage, replace complete factory probe assembly; field splicing or repairing integral probe cable is strictly prohibited.

Supplementary Remark

330105‑02‑12‑05‑02‑05 is a 0.5‑meter integral‑pigtail reverse‑mount 3300‑XL 8 mm NSv eddy‑current proximity probe with 3/8‑24 UNF thread, miniature ClickLoc connector and ATEX/IECEx/CSA multi‑hazardous‑area certifications. It is designed for rear‑side serviceable turbomachinery bearing‑housing installation, and only interoperates with NSv ClickLoc transducer components, incompatible with legacy Microdot‑interface hardware. Before commissioning, cross‑check reverse‑mount housing requirement, total transducer‑loop length, ClickLoc interface and hazardous‑area certification against project BOM and mechanical drawings.