330730-080-00 Bently Nevada 3300 XL 11mm Extension Cable (8.0m)

Product Overview

The 330730-080-00 serves as the high-precision signal conduit for the Bently Nevada 3300 XL 11mm Proximity Transducer System. This 8.0-meter extension cable bridges the gap between the 11mm probe and the Proximitor® Sensor, maintaining signal integrity over long distances in demanding industrial environments. While 8mm systems handle standard machinery, the 11mm system—and this specific cable—supports applications requiring a wider linear range (up to 4.0 mm / 160 mils), such as large steam turbines and axial thrust measurements.

Engineered with advanced fluoropolymer insulation, the 330730-080-00 prevents signal attenuation and electromagnetic interference (EMI). Its low-capacitance design ensures that the high-frequency eddy current oscillations remain stable, providing the monitoring system with a clean, accurate representation of shaft position or vibration. Whether installed in a cable tray or a protective conduit, this cable withstands the extreme thermal cycling typical of power generation and petrochemical facilities.

Technical Configuration

The model 330730-080-00 follows a strict physical calibration logic to ensure the total system impedance remains within Bently Nevada's performance specifications.

Cable Length (080)

The 080 option designates a total length of 8.0 meters (26.2 feet). In proximity systems, cable length is not arbitrary; the Proximitor® is calibrated for a specific total system length (typically 9.0 meters). When paired with a 1.0-meter probe, this 8.0-meter cable completes the electrical loop perfectly.

Connector and Cable Option (00)

The 00 indicates the Standard coaxial cable configuration without additional stainless steel armor. This version offers maximum flexibility for routing through tight conduits or internal machine housings while utilizing the high-performance FEP (Fluorinated Ethylene Propylene) outer jacket for chemical resistance.

High-Precision Capacitance

With a typical capacitance of 69.9 pF/m, this cable minimizes phase shifts and signal lag. This electrical precision is what allows Bently Nevada systems to maintain a consistent 3.94 V/mm (100 mV/mil) sensitivity across the entire 11mm system's extended range.

Technical Specifications

Engineering Advantages

The 330730 series extension cables provide a significant reliability edge for critical asset protection:

• ClickLoc™ Technology: The cable features gold-plated ClickLoc™ connectors that snap together securely. This "click" provides tactile confirmation of a solid connection, preventing the signal "spiking" often caused by loose threaded connectors in high-vibration areas.

• Extreme Temperature Resilience: The FEP jacket remains flexible at -51°C and structurally sound up to +177°C, allowing the cable to be routed near steam lines or in arctic environments without cracking or melting.

• Chemical Immunity: The outer insulation resists degradation from synthetic lubricants, hydraulic fluids, and most industrial solvents, ensuring a service life measured in decades rather than years.

Installation & Maintenance Guide

A proximity system's accuracy is only as good as its cable connections. Follow these engineering best practices:

Total System Length Matching

Always verify that your total cable length (Probe + Extension) matches the "System Length" printed on your Proximitor® Sensor. For this 8.0m cable, you must use a 1.0m probe to reach the 9.0m system calibration. Mixing 5m and 9m components will cause severe scale factor errors.

Connector Protection

While the ClickLoc™ connector is robust, it is not waterproof. In environments with high moisture or oil mist, always use Connector Protectors (clear plastic sleeves or heat-shrink) to prevent fluid ingress into the coaxial junction.

Proper Routing

Avoid routing the 330730-080-00 parallel to high-voltage AC power lines. If cross-talk is suspected, ensure the cable is placed in a grounded metal conduit. Never use zip-ties so tight that they deform the cable jacket, as this changes the internal capacitance and ruins the calibration.

Technical FAQs

Q1: Can I use this 11mm extension cable with an 8mm probe?

A1: No. The 11mm system uses a larger probe tip and a different Proximitor® calibration. The 330730 cable is specifically tuned for the electrical characteristics of the 11mm series. Using it with 8mm components will result in inaccurate readings.

Q2: What happens if I cut the cable to a shorter length?

A2: Never cut or splice a proximity extension cable. The length is an integral part of the tuned circuit. Shortening the cable will change the capacitance, leading to a massive error in the gap voltage and vibration sensitivity.

Q3: Is this cable available with stainless steel armor?

A3: Yes. While the "00" option is standard, the 330730 series can be ordered with "01" or "02" options for flexible AISI 302 SST armor if the cable will be exposed to physical abrasion or flying debris.

Q4: How do I identify a 3300 XL 11mm cable compared to an 8mm cable?

A4: Most 3300 XL cables look similar, but the 11mm series often features a larger connector body or specific color-coded tags. Always verify the part number 330730 on the cable's identification label before installation.