Bently Nevada 330101-39-63-10-12-05 3300 XL 8 mm Probe, 3/8-24 UNF Thread

Product Overview

The Bently Nevada 330101-39-63-10-12-05 is a 3300 XL 8 mm probe with a 3/8-24 UNF thread, designed without armor for applications where direct mounting is preferred. This eddy current probe measures relative vibration and position between a rotating shaft and the bearing housing. It is part of the proven 3300 XL series, known for enhanced durability and signal integrity. The probe includes a patented TipLoc molding method for a robust bond between tip and body, plus a CableLoc design providing 330 N (75 lbf) pull strength.

Technical Specifications Breakdown

Key parameters for the 330101-39-63-10-12-05 are listed below for quick reference:

Industry Applications

Its 2 mm linear range and high sensitivity (7.87 V/mm) enable precise shaft radial vibration and position measurements. The stainless steel case and PPS tip resist chemical exposure and mechanical abuse, reducing failure risk in refineries and chemical plants. The FluidLoc cable option prevents oil wicking, a common issue in lubricated bearing housings, thereby extending sensor life and reducing maintenance costs.

Installation & Setup Guidance

Mount the probe using the 3/8-24 UNF thread into a rigid bracket or bearing housing. Ensure the target surface is clean and conductive (e.g., steel shaft). The recommended gap setting for radial vibration is -9 Vdc, approximately 1.27 mm (50 mils). Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG), preferably 3-conductor shielded triad cable. Maximum field wiring length between the 3300 XL Proximitor Sensor and the monitor is 305 meters (1,000 feet). Verify the probe DC resistance: for a 1.0 meter probe, RPROBE is 7.59 ± 0.50 Ω. Avoid exposing the probe to temperatures below –34°C (–30°F) to prevent premature pressure seal failure.

Maintenance & Reliability

The 3300 XL probe is designed for long-term reliability. Inspect the cable and connector periodically for wear or damage, especially in high-vibration areas. The probe can operate in up to 93% relative humidity with less than 3% change in Average Scale Factor (ASF) per IEC 68-2-3. For standard probes, the operating and storage temperature range is -52°C to +177°C (-62°F to +350°F). Extended temperature range probes handle up to +218°C (+425°F) at the tip. Ensure the Viton® O-ring seal is intact to maintain differential pressure sealing. Please verify current lifecycle status and availability with AutoDCSTech before ordering.

Why Your Machinery Protection Demands a Robust Vibration Probe

When monitoring critical rotating machinery, a single sensor failure can lead to costly downtime or catastrophic damage. How can you ensure reliable, accurate vibration measurement in harsh industrial environments? The Bently Nevada 330101-39-63-10-12-05 3300 XL 8 mm probe delivers the ruggedness and precision you need for continuous protection.

Compatibility & Integration

This probe is designed for use with Bently Nevada 3300 XL Proximitor Sensors and compatible monitoring systems (e.g., 3500, 3300 racks). The miniature coaxial ClickLoc connector ensures secure, quick cable attachment. The FluidLoc cable option is available for applications requiring oil leak prevention. The probe's 7.87 V/mm scale factor matches standard 3300 XL system requirements, ensuring interchangeability within ±5% over the 0°C to +45°C range.

Selection Guide & Purchasing Advice

When selecting a replacement or new probe, verify the thread size (3/8-24 UNF), total length (1.0 meter), and connector type (ClickLoc). The 330101-39-63-10-12-05 is a standard configuration without armor. For armored versions or different cable lengths, consult AutoDCSTech for alternatives. AutoDCSTech stocks genuine Bently Nevada parts and can assist with lifecycle status and cross-references. Order with confidence for your critical machinery protection needs.