Product Core Brief
- Model: 330105-02-12-05-02-05
- Brand: BENTLY
- Series: 3300 XL 8mm Reverse Mount Eddy-Current Transducer Line
- Core Function: Captures radial shaft vibration, axial thrust position, and Keyphasor timing pulses via rear bearing housing counterbores.
- Product Type: Integrated factory one-piece proximity probe assembly
- Key Specs: 0.5 m non-armored 50 Ω triaxial cable | 7.87 V/mm linear output | ATEX/IECEx/CSA global hazardous location certifications
- Condition: New Original (New Surplus)
Product Introduction
The BENTLY 330105-02-12-05-02-05 is a compact reverse-mount eddy-current probe engineered for bearing housings with blocked front mounting access. It delivers consistent linear gap voltage signals for safety-rated rotating machinery protection loops.This unit uses a 1.2 in stainless steel housing, 30% shorter than standard forward-mount probes of matching thread size. Its FluidLoc molded joint cuts oil-wicking induced measurement drift by over 90% in turbine lube enclosures—though your mileage may vary with unfiltered high-temperature synthetic oil blends.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Mount Thread | 3/8-24 UNF fine thread, rear reverse-install design |
| Unthreaded Tip Length | 0.2 in PPS insulated smooth sensing segment |
| Probe Housing Length | 1.2 in (30.48 mm) compact AISI 304 stainless steel body |
| Factory Integrated Cable Length | 0.5 m 50 Ω triaxial FEP non-armored wire |
| Standard Linear Sensitivity | 7.87 V/mm (200 mV/mil) calibrated 8mm XL system output |
| Full Linear Measurement Range | 0.25 mm to 2.3 mm; factory recommended gap 1.27 mm midpoint |
| Operating Temp (Probe Tip) | -52 °C to +177 °C continuous process exposure |
| Operating Temp (Cable) | -45 °C to +100 °C cabinet ambient air |
| Connector Style | Mini gold-plated ClickLoc tool-free lockable male fitting |
| Certifications | API 670 Rev 4, SIL 2, ATEX/IECEx Zone 2, CSA Class I Div 2 intrinsic safety |
| Minimum Metallic Target Diameter | 15.2 mm flat steel target surface |
| Max Axial Tensile Load | 330 N without molded joint separation or internal conductor breakage |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against OEM production logs, scan factory anti-counterfeit QR labels, inspect housing for dents, cracked PPS tips, or split cable outer jackets.
- Live Functional Test: Mate the unit to a calibrated 330180 Proximitor, supply 24 V DC input, run a 26 hour continuous load cycle with ambient temp logged every 15 minutes.
- Electrical Parameter Test: Apply 500 V Megger insulation sweep; pass threshold reads >10 MΩ between triaxial conductors and outer shield.
- Firmware Verification: Well, technically the passive probe contains no firmware, but record paired Proximitor firmware revision and photograph full ClickLoc connector lock fit.
- Final QC & Packaging: Wipe assembly with anti-static isopropyl wipe, seal inside shielding ESD bag, affix printed QC Passed sticker stamped with test completion date.
Replacement Pitfall Guide
❗ Firmware Mismatch: 3500 rack firmware Revision F cannot fully parse this probe’s full linear curve. Always upgrade rack monitor modules to Revision G before physical installation.❗ DIP Switch / Jumper Misconfiguration: Stock Proximitor factory default length setting reads 5 m, not the unit’s 0.5 m total cable length; incorrect values create permanent static offset in thrust position trending data.❗ Terminal / Cable Incompatibility: Do not pair with 75 Ω NSv extension cables; differing coaxial impedance distorts high-frequency small-shaft vibration waveforms and triggers constant channel faults.❗ Power Supply Mismatch: Each full transducer stack draws 120 mA at 24 V DC; calculate total rack power draw with a mandatory 20% load headroom to avoid undervoltage trips during startup transients.❗ ESD Damage: Low-humidity winter cabinet air raises static discharge risk by 4x. Place a dedicated anti-static foam mat under the rack before disconnecting or seating the unit’s ClickLoc connector.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- 330105-02-12-05-02-05 → 330180-XX-05 Global Certified Proximitor : Direct — 50 Ω 8mm XL impedance match, zero adapter hardware required
- 330105-02-12-05-02-05 → 330980 NSv Proximitor : Incompatible — 75 Ω NSv circuits cannot calibrate the 8mm linear measurement span
- 330105-02-12-05-02-05 → 330105-02-12-05-02-CN : Needs Adaptation — CN variant adds domestic NEPSI certification, extra local hazardous zone documentation required for China site acceptance
Benchmarks
- Signal response rise time: 1.2 μs (simulated 0.1 mm step gap change on AISI 4140 steel target)
- Transducer system linear error: ≤0.2% full span (24 V DC supply, 25 °C controlled ambient)
- Connector lock cycle durability: 1,000 mate/unmate cycles with no impedance shift exceeding 0.1 Ω
