Bently Nevada 330101-00-67-20-02-05 3300 XL 8 mm Probe, 3/8-24 UNF, Without Armor

Technical Specifications Breakdown

Key parameters for the 330101-00-67-20-02-05 are listed below for quick reference:

Real-World Applications

Turbine Shaft Vibration Monitoring

In steam and gas turbines, the 3300 XL 8 mm probe provides continuous radial vibration measurement. Its 2 mm linear range and 7.87 V/mm scale factor allow early detection of imbalance or misalignment, helping avoid unplanned outages. The stainless steel case and PPS tip resist oil and high temperatures up to +177°C.

Compressor Clearance and Position Sensing

For centrifugal compressors, the probe monitors axial shaft position and radial vibration. The miniature coaxial ClickLoc connector simplifies installation in tight spaces, while the CSA, ATEX, and IECEx approvals ensure safe operation in hazardous areas.

Installation Guidance

Mount the probe using the 3/8-24 UNF thread into a suitable mounting boss. 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 applications. Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG) with a three-conductor shielded triad cable. Maximum field wiring length between the Proximitor Sensor and the monitor is 305 meters (1,000 feet).

Maintenance and Reliability

Inspect the probe cable and connector periodically for signs of wear or damage. The patented CableLoc design provides 330 N (75 lbf) pull strength to secure the cable. Avoid exposing the probe to temperatures below -34°C (-30°F) to prevent premature failure of the pressure seal. The probe is designed to seal differential pressure using a Viton® O-ring.

Durable Vibration Sensing for Critical Machinery

When protecting rotating assets like turbines, compressors, and pumps, the sensor interface must withstand harsh conditions while delivering precise data. The Bently Nevada 330101-00-67-20-02-05 is a 3300 XL 8 mm Probe designed for eddy-current vibration and position measurement. Its 3/8-24 UNF thread and robust construction make it suitable for permanent installation in industrial environments where reliability is non-negotiable.

Compatibility and Integration

This probe is part of the 3300 XL series and works with compatible Bently Nevada Proximitor Sensors and monitoring systems. The 2.0 meter standard cable length suits many mounting distances. For longer runs, ensure the total system length (probe + extension cable) does not exceed 9 meters to maintain specified accuracy.

Selection Guide and Purchasing Advice

When selecting a replacement or new probe, verify the thread size (3/8-24 UNF), overall case length (6.7 in), and total cable length (2.0 m). The 330101-00-67-20-02-05 includes CSA, ATEX, and IECEx approvals for global use. Contact AutoDCSTech for current lifecycle status and availability before ordering.

Troubleshooting Common Issues

If the output signal is noisy or unstable, check the probe tip for contamination and verify the gap setting. Ensure the target material is ferromagnetic and electrically conductive. For signal roll-off at high frequencies with long field wiring, refer to the frequency response graphs in the product manual. If the probe fails to produce a linear output, test the DC resistance: for a 2.0 m probe, RPROBE should be 7.88 ± 0.50 Ω.