Bently Nevada 330103-11-16-10-12 – 8mm Eddy Current Proximity Probe | 3300 XL Series
Engineering Background
The Bently Nevada 330103-11-16-10-12 is an 8mm eddy current proximity probe engineered for the 3300 XL Proximity Transducer System — the industry benchmark for continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion in rotating machinery. Designed to API 670 standards, this probe is the preferred choice of reliability engineers and OEM integrators worldwide for turbines, compressors, pumps, and motors in critical process environments.
Product Positioning
As an authorized distributor and technical partner, Konmask.com supplies the 330103-11-16-10-12 with full traceability documentation. This SKU is optimized for installations requiring a 1-meter (39.4 in) armored cable, 5-meter (16.4 ft) extension cable, and standard 3/8-24 UNF thread mounting — the most common field configuration for API 670 machinery protection systems.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 330103-11-16-10-12 |
| Probe Tip Diameter | 8 mm |
| Probe Thread | 3/8-24 UNF |
| Probe Cable Length | 1.0 m (39.4 in) armored |
| Extension Cable Length | 5.0 m (16.4 ft) |
| Total System Cable | 5.0 m (standard) |
| Linear Range | 0.25 – 2.25 mm (10 – 90 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –35°C to +121°C (–31°F to +250°F) |
| Supply Voltage | –24 VDC (nominal) |
| Output Voltage Range | –2 to –22 VDC |
| Connector Type | Integral coaxial, 3-pin |
| Housing Material | 316 Stainless Steel |
| Ingress Protection | IP67 |
| Compliance | API 670, CE, RoHS |
| Compatible Driver | 3300 XL NSv / 3300 XL 8mm |
| Weight | Approx. 230 g |
Proven Application Environments
- Steam & Gas Turbines — Continuous shaft radial vibration monitoring per API 670
- Centrifugal Compressors — Rotor axial position and differential expansion measurement
- Pumps & Motors — Bearing journal orbit analysis and eccentricity ratio monitoring
- Gearboxes — High-speed pinion shaft displacement in petrochemical trains
- Hydro Turbines — Thrust position and guide bearing clearance monitoring
- Marine Propulsion — Shaft alignment verification in confined machinery spaces
Engineering Advantages
- Non-Contact Measurement — Zero mechanical wear; suitable for continuous 24/7 operation in critical machinery protection loops
- API 670 Compliant — Meets the most stringent international standard for machinery protection instrumentation
- Wide Temperature Range — Qualified to –35°C / +121°C for hot-section turbine and cryogenic compressor applications
- Armored Cable Construction — 316 SS braid armor resists abrasion, chemical attack, and EMI in harsh plant environments
- Plug-and-Play Compatibility — Direct replacement for existing 3300 XL installations; no recalibration required when replacing like-for-like
- High Frequency Response — DC to 10 kHz bandwidth captures sub-synchronous, synchronous, and super-synchronous vibration components
System Architecture & Signal Flow
The 330103-11-16-10-12 operates as the sensing element in the Bently Nevada 3300 XL Proximity Transducer System. Signal flow: Probe Tip → Eddy Current Field → Target Shaft → Impedance Change → Oscillator/Demodulator Driver → –VDC Output → Monitor Card (3500/3300 Series) → DCS / Safety System.
The probe must be paired with a compatible 3300 XL driver (e.g., 330180 series) and a calibrated extension cable of matching total system length. Mixing cable lengths or driver types will shift the scale factor and invalidate API 670 calibration.
Sourcing & Quality Verification
- All units supplied by Konmask.com are sourced from authorized distribution channels or verified surplus with full inspection
- Each unit undergoes incoming inspection: visual, dimensional, and functional verification against OEM datasheet
- Serialization and date codes are verified; counterfeit-risk items are rejected at intake
- Certificate of Conformance (CoC) and test reports available upon request
- Packaging: original OEM or equivalent ESD-safe packaging with desiccant
Procurement Process
- Confirm Compatibility — Verify your driver model (330180-xx), total cable length, and target material (steel/Inconel) before ordering
- Request Quote — Contact support@konmask.com with your PO number, required quantity, and delivery timeline
- Lead Time — In-stock units ship within 1–3 business days; ex-stock orders confirmed within 24 hours
- Documentation — CoC, packing list, and commercial invoice provided with every shipment
- After-Sales Support — Technical application support available via email or phone for installation and commissioning queries
Technical FAQ
Q: Can the 330103-11-16-10-12 be used with a 3500 series monitor?
A: Yes. The 3300 XL probe system is fully compatible with Bently Nevada 3500 series monitor cards when paired with the correct driver and total cable length.
Q: What target materials are compatible?
A: The probe is calibrated for AISI 4140 steel. For Inconel, titanium, or other alloys, a material correction factor must be applied per the 3300 XL calibration procedure.
Q: Is field recalibration required after replacement?
A: Not required for like-for-like replacement (same SKU, same total cable length). A gap voltage verification check is recommended per API 670 Section 5.
Q: What is the maximum shaft surface speed?
A: No mechanical contact; surface speed is not a limiting factor. Frequency response (DC–10 kHz) is the practical upper limit for vibration measurement.
Q: Can I extend the cable beyond 5 meters?
A: No. Total system cable length is fixed at 5 meters for this SKU. Changing cable length requires a different part number and driver recalibration.
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