Description

Engineered for continuous machinery health monitoring, the Bently Nevada 330101-46-65-10-02-CN is a high-precision 3300 XL 8 mm Proximity Probe designed to measure radial vibration, axial thrust, and speed on critical rotating assets. This probe features a 3/8-24 UNF thread configuration without armor, optimized for direct thread-in installation on machine casings. Utilizing advanced polyphenylene sulfide (PPS) tip materials and an AISI 303/304 stainless steel case, the assembly is hermetically sealed to prevent fluid ingress and maintain signal integrity in demanding industrial environments.

This specific configuration provides an unthreaded length of 4.6 inches combined with a total case length of 6.5 inches. Output is transmitted through a 1.0-meter standard cable fitted with a miniature coaxial ClickLoc connector, allowing robust, click-to-lock field integration with standard extension cables and 3300 XL Proximitor sensors.

Features

• Rugged Material Selection: The probe tip is molded from high-performance Polyphenylene Sulfide (PPS) to resist chemical degradation and physical erosion.
• ClickLoc Coaxial Connection: Equipped with a standard miniature coaxial connector featuring a positive lock mechanism that prevents accidental disconnection due to high frequency vibrations.
• Sealed Cable Construction: Integral standard coaxial cable remains fully operational across extreme thermal gradients.
• Broad Temperature Compatibility: Operates reliably from -51 Celsius up to +177 Celsius, ideal for steam turbines, gas turbines, and gearboxes.

Applications

• Radial shaft vibration measurements on high-speed turbo-machinery.
• Thrust position monitoring in industrial steam and gas turbines.
• Speed and keyphasor phase reference sensing on power generation units.
• Fluid-film bearing clearance analysis on large compressors, expanders, and pumps.

Ordering Information

Technical Specifications Table

Connections and Interfaces

Alternative Models & Compatibility

This 1.0-meter probe is fully compatible with standard Bently Nevada 3300 XL Proximitor sensors configured for 5-meter or 9-meter system lengths. To achieve a matched system, ensure the extension cable length satisfies the calculation: Total System Length - Probe Length = Extension Cable Length (e.g., use a 4.0-meter extension cable for a 5.0-meter Proximitor sensor). For armored options, reference the 330102 series equivalent units.

Application Pitfalls & Engineering Notes

During startup phases, machinery rotors exhibit thermal growth which changes the physical offset relative to the probe face. Ensure the nominal target gap is calibrated to the center of the Proximitor's linear range (typically -10 VDC or approximately 1.27 mm gap) at cold-state assembly to prevent out-of-range faults during peak operating temperatures. Avoid installing this probe adjacent to keyways, oil holes, or non-homogenous shaft materials, which introduce physical or electrical runout artifacts into the vibration signal.

Commissioning & Wiring Tips

Ensure that ClickLoc connectors are thoroughly cleaned with a residue-free solvent (such as isopropyl alcohol) and dried before final assembly. When making connections, turn the connector sleeves by hand until they click; do not use pliers or excessive force, as this can deform the internal coaxial contact. Secure the coaxial junction inside a dedicated environmental junction box to prevent moisture penetration or contamination by synthetic lube oils.

Installation Guidelines