Bently Nevada 3300 XL 50mm FluidLoc Extension Cable 330877-080-37-00

Product Overview

The Bently Nevada 330877-080-37-00 is a premium, high-density 3300 XL 50mm Extension Cable. This specific variation features an extended 8.0-meter cable length configuration enveloped in a robust mechanical protective stainless steel armor. Designed for critical machine asset protection, it serves as the vital low-loss electrical link connecting a 3300 XL 50mm proximity probe to a matching Proximitor sensor, enabling high-precision, non-contacting measurement of shaft vibration and axial displacement under grueling conditions.

Core Features

• FluidLoc Triaxial Design: Built using 75Ω triaxial cable technology featuring patented FluidLoc moisture barriers to prevent oil and process fluids from wicking down the inner core.
• Rugged Stainless Steel Armor: Wrapped in a flexible stainless steel armor casing to shield the internal conductor lines from sharp physical impact, pinching, and abrasion.
• Extreme Thermal Performance: Insulated with premium perfluoroalkoxyethylene (PFA), allowing safe, continuous operation across an ultra-wide thermal envelope from −51°C up to +200°C.
• Unapproved Legacy Profile: Configured with Option 00, optimized specifically for non-hazardous general-purpose zones or unclassified machine plant decks.

Technical Specifications

Engineering & Installation Guide

• Total Loop Length Matching: Crucial Engineering Rule: You must ensure that the physical length of your proximity probe plus this 8.0-meter extension cable length adds up precisely to the calibrated total length parameter printed on your Proximitor sensor body (typically a 9.0-meter total loop system specification, matching a 1.0-meter probe). Mismatched loop lengths will severely corrupt calibration slope curves and error outputs.
• Handling the Armored Weight Assembly: At a sturdy module net weight of approximately 1.15 kg due to its continuous stainless steel armor wrapping and extended 8m length, the cable requires solid structural support. Avoid hanging the weight of the cable entirely from the probe or sensor connection points. Secure the run with heavy-duty, insulated cable clamps along the machinery framework.
• Connector Connection Integrity: Ensure the miniature coaxial connectors are clean and free of oil or debris before locking them together. Use a specialized Bently Nevada connector tool to tighten the junction to standard specifications. Never use standard pliers, which can deform the internal 75Ω conductor pins.
• Armor Routing Clearances: While the steel armor sleeve provides superior mechanical protection, it must be kept isolated from high-voltage AC electric lines. Run the extension cable loop within dedicated, low-voltage instrumentation channels to keep electromagnetic fields from causing data artifacts.

Technical FAQs

Q1: What happens if I connect this 8.0-meter extension cable to a probe loop that results in a total system length of 13.0 meters when using a 9.0-meter Proximitor sensor?
A1: Connecting components that do not match the system length of the Proximitor sensor will severely distort the electrical field scaling. The Proximitor will output incorrect millivolt-per-mil vibration readings or trigger constant false over-range alarm faults because the total circuit resistance and inductance parameters are wrong.

Q2: Why are the DC resistance values for the Bently Nevada 330877-080-37-00 exactly double those of the 4-meter version?
A2: Electrical resistance is directly proportional to conductor length. Since this module features an 8.0-meter raw length, the core center-to-coaxial pathway naturally scales to 2.0 ± 0.5 Ω, while the outer coaxial-to-coaxial loop measures at 0.6 ± 0.2 Ω. These tight tolerances must be verified with a precision digital multimeter during commissioning to confirm no internal conductor stretching occurred during installation.

Q3: How well does the PFA insulation layer protect the cable from chemical washdowns on the machinery deck?
A3: PFA (Perfluoroalkoxyethylene) is a highly inert fluoropolymer. It gives the cable outstanding resistance to corrosive synthetic lubricating oils, refinery chemicals, and high-pressure steam cleaning cycles, preventing the cable jacket from breaking down or cracking within its temperature boundaries of −51°C to +200°C.