Bently Nevada 330190-085-01-05 Extension Cable – High-Integrity Signal Transmission | 3500 Series Proximity Probe System
Engineering Background: The Bently Nevada 330190 series extension cables are purpose-engineered interconnects for the 3500 Series machinery protection platform — the global standard for continuous vibration monitoring on critical rotating equipment including steam turbines, gas compressors, and large centrifugal pumps. These cables form the critical signal path between the proximity probe and the Proximitor® sensor, carrying low-level eddy-current signals that must arrive at the monitor with zero distortion.
Product Positioning: The 330190-085-01-05 is an 8.5-metre (28-foot) armored extension cable designed for installations where the Proximitor® sensor cannot be mounted directly adjacent to the probe. It is the OEM-specified interconnect for Bently Nevada 7200, 3300, and 3500 series eddy-current systems and is the only cable variant that guarantees full system calibration compliance without field re-characterization.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 330190-085-01-05 |
| Cable Length | 8.5 m (28 ft) |
| Compatible Probe Series | Bently Nevada 3300 XL, 7200, 3500 Series |
| System Type | Eddy-Current / Proximity Probe Extension |
| Connector – Probe End | MIL-spec coaxial, gold-plated center pin |
| Connector – Proximitor End | MIL-spec coaxial, gold-plated center pin |
| Cable Construction | Coaxial, double-shielded, armored jacket |
| Impedance | 50 Ω nominal |
| Operating Temperature | –55 °C to +125 °C |
| Jacket Material | PTFE / Stainless steel armor (option -05) |
| Bend Radius (min.) | 25 mm dynamic / 12 mm static |
| Weight | ~250 g |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Country of Origin | USA |
| HS Code | 8544.42 |
Proven Application Environments
- Steam & Gas Turbines – Shaft radial vibration and axial position monitoring per API 670
- Centrifugal Compressors – Continuous orbit and gap voltage measurement in hazardous areas
- Large Pumps & Fans – Bearing housing proximity sensing in high-temperature sumps
- Gearboxes – Gear mesh frequency and eccentricity monitoring
- Petrochemical & Refinery Plants – ATEX / IECEx rated installations with armored routing
- Power Generation – OEM-specified replacement on GE, Siemens, and MHI turbine trains
Engineering Advantages
- Zero Re-characterization Required – OEM-matched cable capacitance and inductance ensure the Proximitor® system calibration remains valid without field adjustment
- Double-Shield EMI Rejection – Eliminates interference from VFDs, high-voltage bus bars, and RF sources common in industrial switchgear rooms
- Stainless Armor (-05 Suffix) – Provides mechanical protection against cable tray abrasion, rodent damage, and accidental impact in congested machinery spaces
- Gold-Plated Connectors – Corrosion-resistant contacts maintain <0.1 Ω contact resistance over the full service life in humid or H₂S-bearing atmospheres
- PTFE Dielectric – Stable dielectric constant across the full temperature range prevents signal drift in hot-section installations
- API 670 Compliant – Meets the cable specification requirements of API Standard 670 (5th Edition) for machinery protection systems
System Architecture & Signal Flow
In a complete Bently Nevada eddy-current chain, the 330190-085-01-05 occupies the middle segment:
[ Proximity Probe (3300/7200/3500 XL) ]
↓ Integral Cable (~1 m)
[ Extension Cable 330190-085-01-05 ] ← This product
↓ 8.5 m armored run
[ Proximitor® Sensor (3300/7200 series) ]
↓ 4–20 mA / –24 VDC signal
[ 3500 Rack Monitor / DCS Input Card ]
The extension cable is the only field-replaceable element in this chain that does not require system re-calibration, making it the preferred first-replacement item during troubleshooting of gap voltage anomalies or signal noise events.
Sourcing & Quality Verification
- OEM Traceability – All units supplied with Bently Nevada (Baker Hughes) original packaging and part-number label
- Inspection Protocol – Each cable undergoes continuity, insulation resistance (>1 GΩ @ 500 VDC), and connector torque verification before dispatch
- Shelf Life – Stored in climate-controlled warehouse; FIFO rotation ensures <24-month shelf age at time of shipment
- Documentation Available – Certificate of Conformance, packing list, and datasheet provided on request
Procurement Process
- Confirm part number 330190-085-01-05 against your Bently Nevada system drawing or BOM
- Verify required quantity and delivery timeline with our sales team
- Submit PO or inquiry to [email protected]
- Receive proforma invoice with lead time confirmation (typically 3–7 business days ex-stock)
- Shipment via DHL / FedEx with full tracking; export documentation included for international orders
Technical FAQ
Q: Can I use a generic coaxial cable as a substitute?
A: No. Generic cables will alter the system’s total cable capacitance, shifting the Proximitor® output voltage and invalidating the calibration. Only OEM-specified 330190 series cables maintain system accuracy.
Q: What is the difference between the -01 and -05 jacket suffix?
A: The -05 suffix denotes a stainless steel armored outer jacket for mechanical protection. The -01 suffix uses a standard PVC jacket suitable for protected conduit installations.
Q: Is this cable compatible with the 3300 NSv and 3300 XL probes?
A: Yes. The 330190-085-01-05 is compatible with all Bently Nevada 3300 series, 7200 series, and 3500 XL proximity probe systems sharing the standard MIL-spec coaxial connector interface.
Q: Do you supply the matching Proximitor® sensor and probe?
A: Yes. Konmask.com stocks the complete Bently Nevada eddy-current chain. Contact us for a matched-set quotation.
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