Bently Nevada 330854-040-24-CN 3300 XL 25 mm Extension Cable

Description

Option 040 (4.0 m cable length) and Option 24 (high-temperature FluidLoc cable, non-armored) specify this 3300 XL 25 mm extension cable configuration — 330854-040-24-CN. This high-temperature coaxial cable features the -CN China hazardous area approval package, certifying the assembly under NEPSI and CCC regulations for installation in explosive atmospheres. Designed to bridge the connection between the 330851 proximity probe and the 330850 Proximitor sensor, this component forms part of a complete 3300 XL 25 mm proximity transducer system used for machinery vibration and position monitoring.

In contrast to armored alternatives (such as Option 25) which protect against heavy mechanical crush forces, this unarmored configuration offers superior routing flexibility through narrow industrial conduits. The integrated FluidLoc technology provides an internal moisture and fluid barrier, preventing process media from wicking through the cable jacket and degrading the signal. The system provides non-contact, eddy-current displacement measurements over an extended linear range, making it highly reliable for steam turbine thrust position and large shaft targets.

Features

• Cable Length: 4.0 meters (13.1 feet) total length, designed for precise distance matching within the transducer chain.
• Cable Construction: High-temperature FluidLoc coaxial cable without outer stainless steel armor, facilitating flexible routing and simplified conduit installation.
• FluidLoc Technology: Patented design prevents moisture, oil, and other process fluids from migrating along the internal structure of the coaxial core.
• System Compatibility: Pairs with the 330851 25 mm proximity probe and 330850 Proximitor sensor.
• China Hazardous Area Suffix: Fully compliant with -CN NEPSI and CCC certifications.

Applications

• Steam turbine thrust position monitoring
• Large-target shaft axial and radial displacement measurements
• Reciprocating compressor rod-drop monitoring
• Industrial rotating machinery protection in hazardous environments

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Ensure the combined length of the extension cable (4.0 m) and the probe lead (1.0 m) equals the required system length of the 330850 Proximitor sensor (5.0 m total system configuration).
• Protect the connections using a fluorosilicone connector protector kit (Bently Nevada part number 40113-02) or silicone self-fusing tape (Bently Nevada part number 03200006) to guard against fluid ingress.
• Observe a minimum bend radius during installation to prevent damaging the internal coaxial core and shield.
• Route the unarmored cable through dedicated conduit to shield it from harsh mechanical environments and external electromagnetic interference.

Compliance and Certifications

• CCC (China Compulsory Certification)
• NEPSI (National Supervision and Inspection Centre for Explosion Protection and Safety of Instrumentation)
• Ex ia IIC T5...T1 Ga (when installed with approved intrinsically safe zener barriers or galvanic isolators)
• Ex ec IIC T4/T5 Gc (hazardous area approvals)