Bently Nevada 330101-02-78-05-02-00 3300 XL 8 mm Probe, 3/8-24 UNF

Product Overview

The Bently Nevada 330101-02-78-05-02-00 is a 3300 XL 8 mm probe with 3/8-24 UNF thread, designed without armor for precise vibration and position monitoring in rotating machinery. This probe features a patented TipLoc molding method that creates a robust bond between the probe tip and body, while the CableLoc design provides 330 N (75 lbf) pull strength for secure cable attachment. The 8 mm probe body offers a thicker encapsulation of the probe coil in molded PPS plastic, resulting in a more rugged and durable sensor suitable for demanding industrial environments.

Technical Specifications Breakdown

Key parameters for the 330101-02-78-05-02-00 are listed below for quick reference:

Industry Applications

The 2 mm linear range with a recommended gap setting of -9 Vdc (approximately 1.27 mm) ensures accurate monitoring within the 0.25 to 2.3 mm range. Compared to smaller probes, the 8 mm design offers superior physical robustness, reducing the risk of damage during installation or operation.

Installation & Setup Guidance

When installing the 330101-02-78-05-02-00, ensure proper thread engagement: the 3/8-24 UNF thread has a maximum engagement length of 0.563 in. For standard forward mounted probes, apply a recommended torque of 11.2 N•m (100 in•lbf) for the probe case, and 7.5 N•m (66 in•lbf) for the first three threads. Use 3-conductor shielded triad cable for field wiring, with conductor sizes from 0.2 to 1.5 mm² (16 to 24 AWG). The maximum field wiring length between the Proximitor Sensor and monitor is 305 meters (1,000 feet). Avoid exposing the probe to temperatures below -34°C (-30°F) to prevent premature pressure seal failure.

Maintenance & Reliability

Inspect the probe and cable periodically for physical damage, especially near the tip and connector. The probe is designed to seal differential pressure between the tip and case using a Viton O-ring, but it is not pressure tested before shipment. For applications requiring pressure seal verification, contact the custom design department. The probe's relative humidity performance shows less than a 3% change in Average Scale Factor (ASF) when tested at 93% humidity per IEC standard 68-2-3 for up to 56 days, ensuring reliability in moist environments.

Compatibility & Integration

The 330101-02-78-05-02-00 is part of the 3300 XL system and works with 3300 XL extension cables and Proximitor sensors. The miniature coaxial ClickLoc connector provides a secure, quick connection. For systems requiring 5 or 9 meter total cable length, the Incremental Scale Factor (ISF) is 7.87 V/mm (200 mV/mil) with interchangeability error of ±5% for standard 5 or 1 meter systems, and ±6.5% for standard 9 meter systems. The Deviation from Best Fit Straight Line (DSL) is less than ±0.025 mm (±1 mil) for standard 5 or 1 meter systems over 0°C to +45°C.

Selection Guide & Purchasing Advice

When selecting a probe, consider the required unthreaded length, overall case length, and total cable length. The 330101-02-78-05-02-00 offers a 2.0 in unthreaded length, 7.8 in case length, and 0.5 meter cable. For applications needing longer reach or different connectors, other options are available. AutoDCSTech stocks genuine Bently Nevada parts to ensure compatibility and reliability. Please verify current lifecycle status and availability with AutoDCSTech before ordering.