Description
Bently Nevada 330105‑02‑12‑05‑12‑00 — 3300‑XL 11 mm Eddy‑Current Proximity Probe
Product Overview
The 330105‑02‑12‑05‑12‑00 belongs to Bently Nevada 3300‑XL 11 mm large‑gap eddy‑current proximity probe family. It is the field‑sensing element for non‑contact proximity measurement loops, working with matched 11 mm proximitor and extension cable. It converts gap variation between probe tip and metallic rotating target into impedance signals and sends back to proximitor for signal conditioning. This probe complies with API 670, designed for larger working gap requirements on turbomachinery, compressors and heavy‑duty rotating equipment.
Specific Application Information
This is 11 mm large‑gap probe for 3300‑XL 11 mm proximity monitoring system:
- Radial shaft vibration measurement: For machinery requiring larger installation gap, capture dynamic radial shaft displacement for bearing condition monitoring.
- Axial thrust‑position monitoring: Measure thrust‑shaft axial displacement for thrust‑bearing wear evaluation.
- Keyphasor speed & phase reference: Mount against shaft notch to generate trigger pulses for RPM and rotor phase analysis.
- Retrofit & spare replacement: Drop‑in replacement for existing 11 mm probe field loops.
330105-02-12-05-12-00
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | 330105‑02‑12‑05‑12‑00 |
| Series | 3300‑XL 11 mm Large‑Gap Proximity Probe |
| Probe Tip Diameter | 11 mm |
| Probe Body Thread | M14 ×1.5 male thread |
| Probe Body Length | 12 mm |
| Integral Pigtail Cable Length | 0.5 m |
| Connector Type | 12‑pin Microdot connector |
| Scale Factor | 3.94 V/mm (100 mV/mil), calibrated for AISI‑4140 steel target |
| Linear Measurement Range | 4.0 mm (160 mils) |
| Frequency Response | 0 Hz ~ 10 kHz |
| Operating Temperature Range | ‑35 °C ~ +175 °C |
| Certifications | CE, ATEX, IECEx, CSA hazardous‑area approvals |
| Housing Material | Stainless steel |
| Calibration Target | Factory calibrated on AISI‑4140 steel |
| Country of Origin | USA |
| Weight | ≈0.15 kg |
Main Features
- 11 mm large‑gap 3300‑XL probe, API‑670 compliant: Only interoperable with 11 mm proximitor and extension‑cable family. Strictly separate from 8 mm series components.
- 12 mm threaded body: Short‑body construction, suitable for shallow counter‑bore and limited‑depth mounting holes.
- 0.5 m short integral pigtail: Requires matched extension cable to reach full system length; flexible for field cable‑run layout.
- Extended 4.0 mm linear range: Accommodates larger shaft float / installation offset compared to standard 8 mm probes.
- High‑temperature resistance: ‑35 °C ~ +175 °C, fit for turbine and compressor casing environment.
- Stainless‑steel robust housing: Anti‑vibration, oil‑mist resistant for heavy‑duty machinery compartments.
- 12‑pin Microdot coaxial connector: Standard interface to mate with 330131‑xx‑xx‑00 11 mm extension cables.
- Intrinsic‑safety approvals: Suitable for ATEX / IECEx hazardous zones when deployed within complete certified 11 mm proximity loop.
- Stable linear characteristic over full 4 mm working range.
Typical Application Scenarios
- Steam / gas turbine machinery‑protection with larger installation gap requirement
- Heavy‑duty centrifugal compressors for refinery, petrochemical plants
- Large pumps, blowers and rotating equipment with big shaft radial excursion
- Off‑shore platform rotating‑machinery condition‑monitoring
- Sites with shallow counter‑bore mounting hole for 11 mm probe thread
- Hazardous‑classified locations requiring ATEX / IECEx intrinsic‑safety certification
- Spare‑part replacement for existing 3300‑XL 11 mm proximity measurement channels
Related & Recommended Alternative Models
| Model | Description |
|---|---|
| 330105‑02‑16‑05‑12‑00 | 11 mm probe,16 mm body,0.5 m pigtail,12‑pin Microdot |
| 330105‑02‑20‑05‑12‑00 | 11 mm probe,20 mm body,0.5 m pigtail,12‑pin Microdot |
| 330131‑xx‑xx‑00 | 11 mm series extension cable |
| 330181‑51‑05 | 11 mm proximitor,5 m total‑system length,DIN‑rail mount |
| 330181‑71‑05 | 11 mm proximitor,7 m total‑system length,DIN‑rail mount |
| 330181‑91‑05 | 11 mm proximitor,9 m total‑system length,DIN‑rail mount |
Compatible Components & Accessories
- 11 mm extension cables: 330131‑xx‑xx‑00 series. Total system length = probe 0.5 m + extension cable = proximitor rated length.
- Matched 11 mm proximitor: 330181‑51‑05 /71‑05 /91‑05 DIN‑rail proximitor.
- Monitor hardware: Bently 3500/42M, 3300/12, 3300/15 monitor racks.
- Mounting parts: M14×1.5 lock nut, compression fitting for casing installation.
- Calibration test fixture: Static gap calibration rig for pre‑commission check.
- Torque wrench: For correct Microdot connector torque during assembly.
Installation and Configuration Guide
Warning: Installation must be performed by qualified instrumentation technicians. Always refer to original Bently Nevada 3300‑XL official manual as primary reference document.
- Mechanical Probe Mounting
- Thread probe into M14×1.5 casing bore hole; fit lock‑nut for position locking after gap adjustment.
- Probe tip must keep perpendicular to metallic shaft target; tilt reduces linear range and accuracy.
- Guarantee mechanical clearance, avoid tip‑shaft collision under full shaft operating excursion.
- System‑Length Verification
- Probe integral cable =0.5 m. Select extension cable so that sum matches 11 mm proximitor rated total‑system length. Mismatch will alter scale factor.
- Torque Microdot connector to manufacturer specified torque; do not over‑tighten. Never connect / disconnect coaxial connectors under powered proximitor.
- Signal Routing Requirements
- Separate probe coaxial cable from high‑power AC cables, contactors and VFD cables to minimize EMI noise.
- Observe minimum cable bending radius; prevent sharp kinks damaging inner coaxial structure.
- Commissioning Gap Adjustment
- Loosen lock‑nut, adjust probe in/out to set mechanical gap to target shaft.
- Power on 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 position shift. Confirm operating point stays within linear zone (‑1 VDC ~ ‑17 VDC).
- Monitor Channel Setup
- Input gap‑voltage signal to monitor channel, set scale factor to 3.94 V/mm (100 mV/mil) for 11 mm probe.
- Configure alarm & trip thresholds per machine OEM documentation.
- Perform loop test, validate Not‑OK fault by simulating probe open‑circuit.
- Maintenance & Troubleshooting
- Inspect Microdot connector for dirt, corrosion and loose contact during turnaround.
- Monitor gap‑voltage drift; readjust probe gap if deviation occurs.
- Not‑OK fault: check probe tip damage, cable breakage or connector failure. Probe is non‑repairable on‑site; replace full assembly.
- Hazardous‑Area Installation Notes
- For ATEX / IECEx hazardous‑location installation, strictly follow 3300‑XL 11 mm intrinsic‑safety requirements for cable specification, grounding and enclosure rating.
Supplementary Remark
330105‑02‑12‑05‑12‑00 is short‑body 11 mm large‑gap proximity probe with 0.5 m pigtail. It cannot interoperate with 8 mm series hardware. Prior to installation, verify part number, M14×1.5 thread, body length, pigtail length and Microdot pin count versus project BOM and mechanical drawing.
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