Bently Nevada 330101-12-40-10-02-CN 3300 XL 8 mm Probe, 3/8-24 UNF Thread

Product Overview

For maintenance engineers responsible for critical rotating machinery, the Bently Nevada 330101-12-40-10-02-CN 3300 XL 8 mm Probe delivers the precision and durability needed for reliable vibration monitoring. This non-contacting eddy current probe is designed to measure shaft radial vibration and position in turbines, compressors, and pumps. The 3/8-24 UNF thread and 1.0 meter (3.3 feet) total length with a miniature coaxial ClickLoc connector simplify installation in tight spaces. Patented TipLoc and CableLoc molding methods provide a robust bond and 330 N (75 lbf) pull strength, reducing the risk of probe damage during service. The 8 mm diameter probe body and thicker PPS encapsulation offer enhanced ruggedness against physical abuse compared to smaller probes.

Technical Specifications Breakdown

Key parameters for the 330101-12-40-10-02-CN are listed below for quick reference:

Industry Applications

In steam turbines, the 2 mm linear range and 7.87 V/mm scale factor provide precise shaft vibration tracking, enabling condition-based maintenance. For centrifugal compressors in oil and gas facilities, the robust stainless steel case and PPS tip withstand harsh environments, while the ClickLoc connector simplifies cable replacement during turnaround. The 330101-12-40-10-02-CN also suits large electric motors and generators, where its 330 N cable pull strength resists damage from machine vibration.

Installation & Setup Guidance

Mount the probe using the 3/8-24 UNF thread into a rigid, non-magnetic bracket or case tap. Ensure the target surface is clean and free of runout. Set the initial gap to -9 Vdc (approximately 1.27 mm or 50 mils) for radial vibration measurements. Use 3-conductor shielded triad cable for field wiring, with conductor sizes from 0.2 to 1.5 mm² (16 to 24 AWG). Maximum field wiring length is 305 meters (1,000 feet) between the Proximitor sensor and monitor. For high-frequency applications, refer to frequency response graphs to account for signal rolloff with longer cables.

Maintenance & Reliability

Inspect the probe cable and connector periodically for signs of wear or fluid ingress. The FluidLoc cable option (if ordered) prevents oil leakage through the cable interior. Avoid exposing the probe to temperatures below -34°C (-30°F), which may cause premature pressure seal failure. The Viton O-ring seal is designed for differential pressure applications but is not pressure tested prior to shipment. If your application requires pressure seal verification, contact the custom design department. The probe’s relative humidity tolerance is less than 3% change in Average Scale Factor when tested at 93% humidity per IEC 68-2-3 for up to 56 days.

Compatibility & Integration

The 330101-12-40-10-02-CN is part of the 3300 XL system and works with 3300 XL extension cables and Proximitor sensors. The standard 5 or 1 meter system offers ±5% interchangeability error, while the 9 meter system provides ±6.5%. For extended temperature range applications (probe tip to +218°C), use the ETR version. The miniature coaxial ClickLoc connector ensures a secure, quick connection without special tools.

Selection Guide & Purchasing Advice

When selecting a replacement probe, verify the unthreaded length (1.2 in), overall case length (4.0 in), and total length (1.0 m) match your installation. The 330101-12-40-10-02-CN includes Country Specific Approval (CN). Please verify current lifecycle status and availability with AutoDCSTech before ordering. AutoDCSTech stocks genuine Bently Nevada parts to minimize downtime for your critical machinery.