Description
The Bently Nevada 330130-085-02-05 is a high-performance extension cable designed for use within the 3300 XL 8mm Proximity Transducer System. It acts as the critical electrical bridge linking the proximity probe to the Proximitor sensor module. The system provides non-contacting static and dynamic measurements of shaft displacement, vibration, and phase reference (Keyphasor) on critical rotating machinery such as turbines, compressors, and large industrial pumps.
Commercial Availability & Terms
- Condition: New Original (Factory Sealed Surplus)
- Warranty: 12-Month Industrial Performance Warranty
- Availability: In Stock
- Standard Lead Time: Ships within 1–2 business days via global express couriers
- Pricing Note: Listed or representative pricing is subject to fluctuating raw material and market conditions. Contact our technical sales engineering division for a formal, time-bound quotation.
Part Number Configuration Breakdown
The alphanumeric structure 330130-085-02-05 specifies the physical length, armor protection, and regulatory certifications required for field installation:
- 330130 (Base Model): 3300 XL 8mm Extension Cable (75-ohm coaxial design matched to 8mm probe systems).
- -085 (Cable Length Option): 8.5 meters (27.9 feet) total cable length.
- -02 (Armor Option): FluidLoc coaxial cable with flexible stainless steel armor. This option provides physical crush resistance and prevents moisture or oil migration through the cable core.
- -05 (Agency Approval Option): Multiple International Agency Approvals package, certified for installation in hazardous locations under ATEX, IECEx, and CSA requirements (Zone 0, 1, and 2 frameworks).
Technical Specifications
| Parameter | Value / Specification |
| System Impedance | 75 \Omega nominal characteristic impedance |
| Capacitance | 69.9 pF/m (21.3 pF/ft) nominal |
| Total System Length Constraint | Must sum to 9.0 meters total when paired with a 0.5 meter probe |
| Cable Construction | Coaxial cable with FEP (Fluorinated Ethylene Propylene) dielectric and outer jacket |
| Armor Material | Flexible AISI 302 stainless steel armor sleeve |
| Connector Type | Miniature coaxial click-lock connectors (Gold-plated brass) |
| Operating Temperature | −51 to +177 °C (−60 to +350 °F) continuous ambient range |
| Minimum Bend Radius | 25.4 mm (1.0 in) for armored configurations |
Field Integration & Calibration Constraints
When deploying the 330130-085-02-05 extension cable, precise physical and electrical rules must be followed to avoid measurement errors:
- Strict System Length Matching: Proximitor sensors are factory-tuned and calibrated to a specific total electrical length—either 5.0 meters or 9.0 meters. Because this cable is 8.5 meters long, it must be paired exclusively with a 0.5 meter proximity probe and a 9.0 meter Proximitor sensor. Using it with a 1.0 meter probe will alter the overall impedance, causing a severe calibration shift and rendering the vibration data inaccurate.
- Connector Ingress Protection: The miniature coaxial connectors are sensitive to oil, water, and dirt infiltration. Always use silicone connector protector boots (Bently Nevada part number 40113-02 or equivalent) over the field connection. Moisture ingress inside the connector will create a parallel resistance path, causing the system to report false shaft movement or drop out completely.
- Physical Clearance in Conduits: When routing the armored cable through field conduit, do not pull the cable by its miniature coaxial connector. Use an appropriate pulling eye on the armor itself, and ensure the conduit fill factor accounts for the 7.11 mm (0.280 in) maximum outer diameter of the stainless steel armor.
Frequently Asked Questions
Can this extension cable be cut or spliced in the field if it is too long?
No. The cable length is an integral part of the transducer’s resonant tank circuit. Cutting the cable changes its total capacitance and inductance, which directly destroys the calibration curve (7.87 V/mm or 200 mV/mil) of the 3300 XL system. Excess cable must be carefully coiled and secured inside a local junction box, maintaining the minimum bend radius of 25.4 mm.
What is the purpose of the FluidLoc option (-02) on this cable?
The -02 FluidLoc option features internal sealing layers within the braided shield and jacket. This specialized engineering prevents oil, water, or process gases from leaking or “wicking” through the inside of the extension cable from the machine interior into the external junction box, protecting sensitive termination panels.
How do I troubleshoot a suspected extension cable failure?
Disconnect the cable at both ends and use a high-quality digital multimeter to check electrical continuity. The resistance of the center conductor should measure approximately 1.5 \Omega per meter of length. Next, check the isolation resistance between the center conductor and the outer shield; it must read infinite resistance (>500 M\Omega). Any low resistance reading indicates an internal short caused by a kink or moisture contamination.
