Bently Nevada 330101-29-50-10-02-CN 3300 XL 8 mm Probe, 3/8-24 UNF Thread

Technical Specifications Breakdown

Key parameters for the 330101-29-50-10-02-CN are listed below for quick reference:

Industry Applications

Turbine Shaft Vibration Monitoring

In steam and gas turbines, reliable shaft vibration measurement is critical for early detection of imbalance or misalignment. The 3300 XL 8 mm probe's linear range of 2 mm (80 mils) covers typical vibration amplitudes, while the patented TipLoc molding method ensures a robust bond between probe tip and body, reducing sensor drift over time. The 1.0 metre cable with ClickLoc connector simplifies installation in confined turbine compartments.

Compressor Protection

Centrifugal and axial compressors operating at high speeds demand sensors that withstand harsh conditions. The stainless steel case (AISI 303 or 304 SST) and PPS tip provide corrosion resistance, and the probe's operating temperature range of -52°C to +177°C (-62°F to +350°F) accommodates both ambient and process heat. The CableLoc design offers 330 N (75 lbf) pull strength to secure the cable against vibration fatigue.

Pump Health Monitoring

For critical pumps in refineries or water treatment, the 330101-29-50-10-02-CN delivers consistent incremental scale factor of 7.87 V/mm (200 mV/mil) ± 5% over the 0°C to +45°C range, ensuring accurate displacement readings. The optional FluidLoc cable (available separately) prevents oil leakage through the cable interior, a common issue in lubricated pump environments.

Installation & Setup Guidance

Mount the probe using the 3/8-24 UNF thread into a suitable mounting boss or bracket. Ensure the target surface is clean and within the recommended gap setting of -9 Vdc (approximately 1.27 mm or 50 mils) for radial vibration measurements. Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG) with a 3-conductor shielded triad cable; maximum 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 tip and cable periodically for physical damage or contamination. The probe is designed to seal differential pressure between tip and case using a Viton® O-ring; however, it is not pressure tested before shipment. For applications requiring a verified pressure seal, contact the custom design department. The probe's relative humidity tolerance is less than 3% change in Average Scale Factor (ASF) when tested at 93% humidity per IEC 68-2-3 for up to 56 days.

Selecting the Right Vibration Probe for Critical Machinery

When monitoring rotating assets like turbines, compressors, and pumps, the probe is your first line of defense against unplanned downtime. The Bently Nevada 330101-29-50-10-02-CN is a 3300 XL 8 mm probe designed for permanent installation in demanding industrial environments. This model features a 3/8-24 UNF thread and is supplied without armor, making it suitable for standard mounting configurations where mechanical protection is provided by the machine housing.

Compatibility & Integration

This probe is part of the 3300 XL system and is compatible with Bently Nevada Proximitor Sensors and monitoring platforms. The miniature coaxial ClickLoc connector ensures a secure, quick connection to extension cables. For system lengths beyond 1 meter, refer to the standard 5 or 9 meter system specifications for incremental scale factor and deviation from best fit straight line (DSL).

Selection Guide & Purchasing Advice

When selecting a probe, consider the machine's operating temperature, required cable length, and mounting thread. For armored or different cable lengths, consult the full 3300 XL probe range. AutoDCSTech stocks this exact model and can advise on lifecycle status and availability. Please verify current lifecycle status and availability with AutoDCSTech before ordering.