Description
Bently Nevada 330105‑02‑12‑05‑02‑00
3300‑XL 8 mm NSv Reverse‑Mount Eddy‑Current Proximity Probe Assembly (Standard‑Temperature, Non‑Hazardous‑Area)
Product Overview
The 330105‑02‑12‑05‑02‑00 belongs to Bently Nevada 3300‑XL 8 mm NSv eddy‑current proximity transducer series. Featuring reverse‑mount mechanical design, this probe enables gap adjustment and unit replacement from the rear side of bearing housing without full turbomachinery disassembly. It measures radial shaft vibration and axial thrust position for critical rotating equipment, and can also serve as Keyphasor phase reference sensor when paired with shaft notch feature. This transducer complies with API‑670 machinery protection standards. Suffix ‑00 denotes no ATEX / IECEx / CSA hazardous‑area intrinsic‑safety approvals, intended for non‑explosive general‑purpose industrial locations.
Critical Compatibility Warning
- This is 8 mm NSv ClickLoc interface reverse‑mount probe. Only compatible with 3300‑XL 8 mm NSv ClickLoc extension cables (330930 series). Not compatible with legacy Microdot probes/cables, ETR high‑temperature transducer sets or 11 mm NSv components.
- Total calibrated transducer loop length = probe integral pigtail length + matched 8 mm NSv extension cable length. Total physical loop length must match length parameter configured inside paired NSv proximitor. Length mismatch will trigger sensitivity deviation and measurement error.
- Termination: Miniature ClickLoc quick‑lock coaxial connector. Do not cut, splice or modify factory‑molded integral pigtail assembly. This unit shall not be installed in explosive classified hazardous zones.
Part Number Decoding
- 330105：Base model, 3300‑XL 8 mm NSv reverse‑mount proximity probe
- ‑02：Mounting thread: 3/8‑24 UNF
- ‑12：Probe housing overall length: 120 mm
- ‑05：Integral non‑armored pigtail cable length: 0.5 meter
- ‑02：Connector type: Miniature ClickLoc coaxial
- ‑00：Certification option: No hazardous‑area intrinsic‑safety approvals
330105-02-12-05-02-00
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | 330105‑02‑12‑05‑02‑00 |
| Series | 3300‑XL 8 mm NSv Reverse‑Mount Proximity Transducer |
| Measurement Principle | Non‑contact eddy‑current displacement |
| Nominal Sensitivity | 7.87 V/mm (200 mV/mil), ±5 % tolerance |
| Linear Measurement Range | 0.25 mm ~ 2.0 mm (10‑80 mil) |
| Probe Tip Diameter | 8 mm |
| Mounting Thread | 3/8‑24 UNF |
| Housing Overall Length | 120 mm |
| Integral Pigtail | 0.5 m, non‑armored standard‑grade FEP insulation |
| Connector Type | Miniature ClickLoc™ gold‑plated quick‑lock coaxial |
| Frequency Response | 0 Hz‑10 kHz |
| Operating Temperature Range | ‑52 °C ~ +121 °C (standard temperature rating) |
| Housing Material | 316 stainless steel |
| Certifications | API‑670 compliant; No hazardous‑area intrinsic‑safety approvals |
| Country of Origin | USA |
| Weight | ≈0.26 kg |
Main Features
- Reverse‑mount mechanical structure: Enables gap tuning and probe replacement from bearing housing rear side, eliminates requirement for major equipment disassembly, simplifies overhaul and routine maintenance workflow.
- 120 mm threaded housing with 3/8‑24 UNF thread: Standard mechanical interface for reverse‑mount shell assemblies widely implemented on turbine and compressor bearing housings.
- 0.5 m factory‑calibrated non‑armored integral pigtail with Miniature ClickLoc connector: Combines with 330930 series 8 mm NSv ClickLoc extension cables to achieve required total transducer‑loop length.
- Standard‑temperature performance rating: Suitable for general‑purpose plant ambient conditions; not applicable for continuous high radiant‑heat positions requiring ETR‑rated hardware.
- Robust industrial construction: Resists oil‑mist, humidity and persistent machinery vibration, satisfies API‑670 protection requirements for critical rotating assets.
- Full interoperability within 3300‑XL 8 mm NSv ClickLoc transducer ecosystem.
Typical Application Scenarios
- Radial vibration and axial thrust‑position monitoring for steam turbines, gas turbines and centrifugal compressors equipped with reverse‑mount probe housings within non‑hazardous industrial zones
- Can be configured as Keyphasor phase reference sensor for speed & phase measurement when facing shaft notch / keyway
- Conventional power‑plant machinery‑house and non‑explosive refinery auxiliary‑system installations
- System integration with Bently Nevada 3500 rack 8 mm NSv‑compatible proximitor input channels
- Spare‑part replacement for existing standard‑temperature reverse‑mount NSv proximity measurement loops
Related & Recommended Alternative Models
| Model | Description |
|---|---|
| 330105‑02‑12‑05‑02‑05 | 8 mm NSv reverse‑mount probe, 120 mm housing, 0.5 m pigtail, hazardous‑area certified |
| 330105‑02‑12‑10‑02‑00 | 8 mm NSv reverse‑mount probe, 120 mm housing, 1.0 m pigtail, non‑hazardous‑area |
| 330930‑075‑00‑00 | 7.5 m non‑armored 8 mm NSv ClickLoc extension cable |
| 330195‑02‑12‑05‑05 | 8 mm ETR reverse‑mount Microdot probe (Microdot interface, incompatible) |
| 330102‑00‑68‑05‑02‑00 | 8 mm NSv smooth‑body sleeve‑mount probe |
Compatible Components & Accessories
- NSv Extension Cables: 330930 series 8 mm NSv ClickLoc extension cables (straight / right‑angle versions)
- Monitoring Hardware: 8 mm‑NSv‑qualified proximitor modules, Bently Nevada 3500 rack 8 mm NSv monitor channels
- Mechanical Accessories: Reverse‑mount probe housing assembly, 43501‑02‑04‑02 low‑pressure cable‑seal assembly, 43574‑04 multi‑hole grommet
- Installation Consumables: Anti‑seize compound for mounting threads, cable clamps for strain‑relief, high‑temperature cable ties
- Calibration Tool: 8 mm NSv static gap calibration fixture
Installation and Configuration Guide
Warning: Installation must be performed by qualified instrument technicians. Always reference original Bently Nevada 3300‑XL NSv transducer‑system manual as primary technical document. This model carries no hazardous‑area certifications and shall not be deployed in explosive classified zones.
- Pre‑installation Total‑Length Calculation
- Calculate total NSv transducer loop length = probe integral pigtail (0.5 m) + selected 8 mm NSv extension‑cable length.
- Verify total physical length matches loop‑length parameter configured in paired NSv proximitor. Length mismatch will cause sensitivity drift and measurement inaccuracy.
- Reverse‑Mount Mechanical Installation
- Mount dedicated reverse‑mount probe housing onto bearing housing following mechanical drawing specifications.
- Apply anti‑seize compound to 3/8‑24 UNF probe thread. Insert probe from rear side of housing, adjust probe‑to‑shaft working gap to mid‑point of linear measuring range, tighten lock‑nut to specified torque value.
- Confirm probe tip maintains safe clearance and will never contact rotating‑shaft surface over full operating‑speed and thermal‑expansion range.
- Cable Routing & ClickLoc Connector Mating
- Route NSv transducer cable separately from high‑power AC, VFD and contactor wiring to mitigate EMI‑induced signal noise.
- Observe minimum static bending radius requirement; avoid sharp kinks. Never pull cable assembly by ClickLoc connector housing.
- Align ClickLoc connector key‑slot, push inward and rotate clockwise until audible “click” for finger‑tight locking. Wrench tightening is strictly prohibited.
- Install strain‑relief clamps near connector joint. Deploy approved cable‑seal fitting when cable penetrates machine casing.
- System Commissioning
- Complete full NSv transducer‑loop assembly and power‑up proximitor / monitoring rack.
- Read static gap voltage to validate mechanical gap setting. Perform static‑gap calibration test with 8 mm NSv calibration fixture to verify system sensitivity.
- Clear Not‑OK fault status; configure vibration and thrust alarm / trip thresholds per project machinery specification.
- Maintenance & Troubleshooting
- During machinery turnaround, inspect probe locking torque, check ClickLoc connector for oil contamination and corrosion; inspect outer jacket for abrasion, cracking or aging deterioration.
- Gap‑voltage drift, abnormal vibration reading or persistent Not‑OK faults may originate from improper installation gap, loose ClickLoc connection, cable damage or incorrectly programmed loop‑length parameter.
- Replace complete factory probe assembly upon pigtail or probe‑tip damage; field‑splicing of integral probe pigtail cable is strictly prohibited.
Supplementary Remark
330105‑02‑12‑05‑02‑00 is a standard‑temperature 3300‑XL 8 mm NSv reverse‑mount eddy‑current proximity probe with 3/8‑24 UNF thread, 120 mm housing and 0.5 m integral pigtail. Without hazardous‑area certifications, it is designed for radial vibration and thrust monitoring on turbomachinery fitted with reverse‑mount housings under non‑explosive industrial environments. It only interoperates with 8 mm NSv ClickLoc system components and cannot work with Microdot, ETR or 11 mm NSv hardware. Before commissioning, cross‑check reverse‑mount housing requirements, total transducer‑loop length, ClickLoc interface and site area classification against project BOM and mechanical drawings.
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