The Bently Nevada 330104-00-05-05-02-CN, also cataloged as the 330104 Proximity Probe, operates as a dedicated hardware component for continuous shaft radial vibration and axial position monitoring within 3300 XL Transducer System platforms. Configured for high-reliability sensing in turbomachinery, this probe provides direct physical and electrical execution of eddy-current signal sensing. It converts the distance between the probe tip and the conductive target into a voltage signal proportional to the gap, facilitating rotor dynamics analysis and machine protection without signal attenuation in challenging industrial environments.

Suffix Breakdown & Model Matrix

The 330104-00-05-05-02-CN assembly is defined by the following technical configuration parameters:

• 00: Unthreaded length (0 mm)

• 05: Overall case length (50 mm)

• 05: Total length (0.5 meters)

• 02: Connector type (Miniature coaxial)

• CN: Regional configuration (Standardized for specific regulatory compliance)

Hardware Specifications

Mechanical Monitoring & TSI Characteristics

The 3300 XL 8 mm transducer system utilizes precise eddy-current probe scaling to ensure linear output relative to shaft distance. During system commissioning, gap voltage validation is mandatory; installers must target -10 VDC when the probe is positioned at the midpoint of its linear range. Rotor dynamics analysis depends on this precise gap setting to accurately capture radial vibration vectors and shaft centerline movement. Signal integrity is maintained through calibrated impedance matching between the probe, the 0.5-meter extension cable, and the Proximitor sensor, effectively suppressing cross-talk interference in multi-channel monitoring arrays.

Ordering Info

• 330104 8 mm Proximity Probe assembly

• Protective connector thread caps

• Product documentation and installation manual

• Note: Mounting adapters and junction boxes are required for field completion and must be ordered according to machine casing geometry.

Field Installation Guidelines

• Gap Setting: Utilize a calibrated feeler gauge or depth micrometer to establish the probe gap; confirm the Proximitor output reaches -10 VDC at the monitor terminal.

• Torque Constraints: Secure the probe locknut using the specified torque to prevent vibration-induced loosening; avoid over-tightening which can deform the stainless steel case.

• Conduit Routing: Install the coaxial cable within dedicated grounded metallic conduit to provide shielding against electromagnetic interference (EMI).

• Grounding: Maintain electrical continuity between the probe housing and the machine chassis to ensure a stable reference voltage and minimize ground-loop noise.

• Surface Integrity: Ensure the target shaft area is free of non-conductive coatings, machining burrs, or debris to prevent signal instability.

Frequently Asked Questions

• Q: Can the 330104 probe be used with legacy 3300 series Proximitors?

• A: No, 3300 XL probes must be used with 3300 XL Proximitors to maintain the calibrated scale factor and frequency response.

• Q: Is the 0.5 meter length field-adjustable?

• A: No, the cable length is an integral part of the tuned system impedance; modification will cause signal non-linearity and calibration errors.

• Q: What is the primary cause of probe output drift?

• A: Drift is commonly caused by thermal expansion of the housing, loose locknuts, or cable damage due to kinking or abrasion.

• Q: Is the PPS probe tip suitable for oil immersion?

• A: Yes, the Polyphenylene Sulfide (PPS) tip is chemically inert and designed to withstand continuous exposure to hydraulic and lubricating oils.

• Q: How often should I perform a dynamic calibration check?

• A: Verify gap voltage at every scheduled shutdown; dynamic calibration using a shaker table is recommended only after transducer repair or replacement.

• Q: What does the 'CN' suffix indicate for regional configurations?

• A: The 'CN' suffix signifies compliance with specific regional regulatory and manufacturing standards. Verify local site requirements for documentation.

• Q: Can I use this probe on non-ferrous shafts?

• A: Eddy-current systems are calibrated for 4140 steel; non-ferrous targets change the magnetic coupling and require a customized scale factor.

• Q: Why is a miniature coaxial connector used?

• A: The connector provides a compact, low-impedance interface that minimizes signal reflection and preserves high-frequency vibration data.