High-Fidelity Signal Integrity

The Bently Nevada 330854-080-25-05 extension cable serves as the critical high-impedance link within the 3300 XL 25mm Proximity Transducer System. Specifically designed for large-scale rotating machinery, this cable maintains the electrical length required to ensure precise displacement and axial position data transmission between the 25mm probe and the Proximitor sensor. In heavy-duty environments like steam turbine halls or large pumping stations, this cable acts as a shielded conduit, protecting weak eddy-current signals from electromagnetic interference (EMI) and mechanical stress. By utilizing low-loss coaxial architecture and ruggedized armor, it ensures the Bently Nevada 3500 system receives the accurate, real-time data necessary for mission-critical emergency shutdown (ESD) decisions.

Suffix Configuration and Material Analysis

330854 - 3300 XL 25mm Extension Cable

Identifies the specialized extension cable compatible only with the 3300 XL 25mm proximity probe series, featuring specific capacitance matching for extended range measurements.

080 - Cable Length

Designates a 8.0-meter (26.2 feet) cable length. When combined with a 1.0-meter probe, this configuration completes a standard 9.0-meter electrical system, ensuring the Proximitor remains calibrated to the sensor.

25 - Armor and Cable Option

Specifies Stainless Steel Armor with FEP Jacket. The interlocking stainless steel armor provides superior crush resistance and protection against sharp metal debris, while the Fluorinated Ethylene Propylene (FEP) jacket offers exceptional chemical and moisture resistance.

05 - Agency Approval Option

Confirms multiple global hazardous area certifications, including ATEX, IECEx, and North American CSA standards. This allows for safe installation in volatile industrial zones when paired with intrinsically safe barriers.

Mechanical and Electrical Specifications

Field Engineering and Routing Guide

Proper cable management is vital to preventing signal attenuation and "Not OK" faults. Engineers must ensure the miniature coaxial connectors are clean and dry before mating; use a dedicated connector protector or heat-shrink tubing to prevent oil ingress in the junction box. When routing the armored cable, respect the 25.4 mm (1.0 inch) minimum bend radius to avoid internal conductor fatigue. Ensure the armor is grounded only at the system monitor end to prevent ground loops. In hazardous area deployments, verify that the cable is secured within conduit or tray systems according to local explosion-proof wiring codes.

Resilience in Extreme Environments

The 330854-080-25-05 is built for the harshest corners of the plant floor. The FEP insulation maintains its dielectric properties under extreme thermal cycling—from cryogenic lows to the blistering heat near turbine casings. Its stainless steel armor prevents accidental severing during maintenance activities, while the shielded coaxial core rejects noise from nearby variable frequency drives (VFDs) and high-voltage motor leads. This cable integrates seamlessly with the Bently Nevada 3500/42M or 3500/45 modules, providing a stable backbone for Turbine Supervisory Instrumentation (TSI) and integration into Honeywell Experion PKS or Emerson DeltaV platforms.

Logistics and Dispatch Standards

Delivery time: 3-5 days when payment finish, BY DHL/FEDEX/UPS.

We deliver all extension cables in anti-static industrial packaging with the connectors capped to prevent oxidation and contamination during global transit.

Technical Support FAQs

Q1: Can I use this 8.0m cable with an 8mm or 11mm probe?

A1: No. The 330854 is electrically matched specifically for the 25mm system. Using it with 8mm or 11mm probes will cause significant linearity errors and scale factor inaccuracies.

Q2: What is the total system length when using this cable?

A2: This 8.0m cable is designed to be used with a 1.0m probe, creating a 9.0-meter total system. Ensure your 3300 XL Proximitor is also configured for a 9.0m system length.

Q3: How do I identify if the extension cable is faulty?

A3: Use a Bently Nevada TK-3 or a voltmeter to check the bias voltage. A sudden shift to the positive or negative supply rail often indicates a broken center conductor or a short to the armor within the extension cable.