Bently Nevada 330130-085-02-00 | 3300 XL 8.5m Extension Cable for Proximitor Systems

330130-085-02-00: Product Overview​

This component is an integral part of the 3300 XL Proximity Transducer System, which is designed for precise, non-contact measurement of shaft vibration, position, and speed in rotating machinery. Within an automation architecture, it serves as a passive data link, physically extending the connection between the probe mounted on the machine case and the Proximitor signal conditioner located in a control cabinet. It does not process signals but is critical for maintaining signal integrity over extended distances. The 3300 XL system is recognized for its high accuracy and reliability, forming the basis for condition monitoring in critical assets managed by distributed control systems (DCS) and safety instrumented systems (SIS). This cable enables the system to be deployed in large-scale equipment where the separation between sensor and electronics exceeds the capacity of standard cables. Its design ensures that the voltage-proportional displacement signal generated by the eddy-current field disturbance is transmitted with minimal degradation, which is essential for accurate analysis by monitoring modules such as the 3500/42M.

330130-085-02-00: Technical Specifications

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Core Features & Customer Value​

Signal Integrity Preservation: The triaxial construction, consisting of a signal conductor, an internal shield, and an outer protective jacket, provides superior protection against electromagnetic interference (EMI) compared to simpler coaxial designs. The FEP insulation material exhibits low dielectric loss, which minimizes signal attenuation over the 8.5-meter span. For the engineer, this translates to reliable data for diagnostic tools, reducing the likelihood of false readings caused by noise.

Robust Mechanical Design: The cable is terminated with ClickLoc connectors, which provide a secure, gas-tight connection that is verified by an audible click. This design prevents accidental disconnection and ensures low contact resistance. The specified bend radius and durable materials allow for installation in congested areas without compromising cable integrity, which is critical for long-term reliability in industrial environments.

Simplified Installation and Maintenance: The standardized design is compatible with all 3300 XL series probes and Proximitors. The clear labeling and tool-free connector engagement reduce setup time. For maintenance teams, the ability to quickly verify and replace the cable without specialized tools contributes to reduced downtime during troubleshooting or system expansion.

Typical Applications​

This extension cable is utilized in scenarios requiring the separation of proximity probes from their associated monitoring electronics. A common application is in large steam turbines, where probes on the high-pressure and intermediate-pressure shafts are routed to Proximitors located in a centralized control room, often 6-8 meters away. In centrifugal compressors at hydrocarbon processing facilities, it connects probes monitoring thrust bearing wear to protection systems. Another application is in hydroelectric generators, where it links rotor position probes to monitoring modules. The cable’s extended temperature rating makes it suitable for placement near turbine casings or in other high-temperature zones. Its robust construction is also valued in pulp and paper mills, where it withstands vibration and humidity while providing reliable data for predictive maintenance programs.