Bently Nevada 330101-00-85-05-01-05 3300 XL 8 mm Probe, 3/8-24 UNF Thread

Technical Specifications Breakdown

Key parameters for the 330101-00-85-05-01-05 are listed below for quick reference:

Industry Applications for the 3300 XL Probe

The 2 mm linear range and high sensitivity (7.87 V/mm) allow precise measurement of shaft radial vibration and axial position. For example, in a refinery compressor train, the 330101-00-85-05-01-05 provides early warning of bearing wear or imbalance, enabling predictive maintenance. The CSA, ATEX, and IECEx approvals make it suitable for hazardous areas where explosive gases or dusts are present. Compared to older 5 mm probes, the 8 mm design offers greater robustness against physical abuse, reducing replacement frequency and operational costs.

Installation & Setup Guidance

Proper mounting is critical for accurate readings. The probe uses a 3/8-24 UNF thread; ensure the mounting hole is tapped to this specification. For standard forward mounted probes, the recommended torque is 11.2 N·m (100 in·lbf) for the probe case, and 7.5 N·m (66 in·lbf) for the first three threads. The maximum thread engagement length is 0.563 in. The recommended gap setting for radial vibration is -9 Vdc (approximately 1.27 mm or 50 mils). Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG) with a 3-conductor shielded triad cable. Maximum field wiring length between the Proximitor Sensor and the monitor is 305 meters (1,000 feet).

Maintenance & Reliability

The 3300 XL probe is designed for long-term reliability in harsh environments. The probe tip is molded PPS plastic with a thicker encapsulation, providing a rugged sensor. The patented CableLoc design offers 330 N (75 lbf) pull strength to prevent cable detachment. The probe case is AISI 303 or 304 stainless steel, resistant to corrosion. Operating temperature range is -52°C to +177°C (-62°F to +350°F) for standard probes. Exposing the probe to temperatures below -34°C (-30°F) may cause premature failure of the pressure seal. Inspect the probe and cable periodically for physical damage, especially in high-vibration or high-temperature applications.

The Evolution of Precision: Why the 3300 XL Probe Matters

Industrial machinery has grown more complex, demanding sensors that keep pace with tighter tolerances and harsher environments. Early vibration probes often suffered from cable pull failures and tip degradation, leading to costly unplanned downtime. The Bently Nevada 330101-00-85-05-01-05 represents a significant leap forward, incorporating patented TipLoc and CableLoc designs to deliver robust, repeatable measurements. This 3300 XL 8 mm probe is engineered for applications where reliability is non-negotiable.

Compatibility & Integration

This probe is part of the Bently Nevada 3300 XL system, designed for use with 3300 XL Proximitor Sensors and extension cables. The miniature coaxial ClickLoc connector ensures a secure, quick connection. The probe is compatible with standard 5 or 1 meter systems, providing an Incremental Scale Factor of 7.87 V/mm ± 5% including interchangeability error. For 9 meter systems, the ISF is ± 6.5%. The system supports field wiring lengths up to 305 meters (1,000 feet) to the monitor.

Selection Guide & Purchasing Advice

When selecting a replacement or new probe, verify the thread size (3/8-24 UNF) and total length (0.5 meter) match your installation. The 330101-00-85-05-01-05 is a non-armored version; if additional cable protection is needed, consider armored options. Please verify current lifecycle status and availability with AutoDCSTech before ordering.