Product Core Brief
- Model: 330901-00-70-10-02-CN
- Brand: BENTLY
- Series: 3300 XL NSv Narrow Side View Mini Eddy-Current Transducer Line
- Core Function: Captures small-shaft radial vibration, thrust displacement, and Keyphasor timing pulses in cramped bearing housing enclosures.
- Product Type: Factory integrated one-piece miniature proximity probe assembly
- Key Specs: 1 m non-armored 75 Ω coaxial cable | 7.87 V/mm linear output | NEPSI + ATEX/IECEx dual hazardous location certifications
- Condition: New Original (New Surplus)
Product Introduction
The BENTLY 330901-00-70-10-02-CN is a compact NSv miniature eddy-current probe built for small-diameter rotating shafts where standard 8 mm XL probes cannot physically mount. It outputs stable gap voltage signals for safety-rated machinery protection racks.This unit uses a 7.0 in stainless steel housing, 40% shorter than full-size forward-mount NSv probes of the same thread spec. Its molded FluidLoc joint blocks lubricant wicking and cuts long-term measurement drift by roughly 92% in high-temperature lube circuits—though your mileage may vary with synthetic high-viscosity turbine oils.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Mount Thread | 1/4-28 UNF fine thread, forward front-mount design |
| Unthreaded Tip Length | 0.0 in fully threaded PPS insulated sensing tip |
| Probe Housing Length | 7.0 in AISI 304 stainless steel compact body |
| Factory Integrated Cable Length | 1.0 m 75 Ω FEP non-armored coaxial wire |
| Standard Linear Sensitivity | 7.87 V/mm (200 mV/mil) NSv system calibrated output |
| Full Linear Measurement Range | 0.25 mm to 1.75 mm; factory recommended gap 1.0 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 Hardware | Mini gold-plated ClickLoc tool-free lockable male fitting |
| Official Certifications | API 670, SIL 2, ATEX/IECEx Zone 2, NEPSI domestic intrinsic safety |
| Minimum Metallic Target Diameter | 8.9 mm flat steel target surface |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against OEM production logs, scan factory anti-counterfeit QR codes, inspect housing for dents, cracked PPS tips, or split cable outer jackets.
- Live Functional Test: Mate the unit to a calibrated 330980 NSv Proximitor, supply 24 V DC input, run a 25 hour continuous load cycle with ambient temperature logged every 12 minutes.
- Electrical Parameter Test: Run 500 V Megger insulation sweep; acceptable pass threshold registers >10 MΩ between coaxial core and outer shield layer.
- Firmware Verification: Well, technically this passive probe contains no firmware, but log paired Proximitor firmware revision and photograph full ClickLoc connector lock engagement fit.
- Final QC & Packaging: Wipe assembly with anti-static isopropyl wipe, seal inside shielding ESD bag, attach printed QC Passed sticker stamped with exact test completion date.
Replacement Pitfall Guide
❗ Firmware Mismatch: 3500 rack firmware Revision F cannot fully resolve the NSv probe’s narrow linear curve. Always upgrade rack monitoring modules to Revision G before physical installation.❗ DIP Switch / Jumper Misconfiguration: Stock Proximitor factory default system length setting reads 5 m, not the unit’s 1 m total length; incorrect values create permanent static offset in thrust position trending data.❗ Terminal / Cable Incompatibility: Do not pair with 50 Ω 8 mm XL extension cables; differing coaxial impedance distorts high-frequency small-shaft vibration waveforms and triggers constant channel faults.❗ Power Supply Mismatch: Each full NSv transducer stack draws 110 mA at 24 V DC; calculate total rack power draw with a mandatory 20% load headroom to avoid low-voltage trips during startup transients.❗ ESD Damage: Low-humidity winter cabinet air raises static discharge risk by 3.8x. 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
- 330901-00-70-10-02-CN → 330980-XX-CN : Direct — 75 Ω NSv impedance match, zero adapter hardware required
- 330901-00-70-10-02-CN → 330180 8mm XL Proximitor : Incompatible — 50 Ω XL circuits cannot calibrate NSv narrow linear measurement span
- 330901-00-70-10-02-CN → 330901-00-70-10-02-05 : Needs Adaptation — Lacks NEPSI certification, extra hazardous zone safety documentation mandatory for domestic classified sites
Benchmarks
- Signal response rise time: 1.1 μs (simulated 0.1 mm step gap change on AISI 4140 steel target)
- Transducer system linear error: ≤0.22% full span (24 V DC supply, 25 °C controlled ambient)
- Connector lock cycle durability: 1,000 mate/unmate cycles with no impedance shift exceeding 0.12 Ω
