Bently Nevada 330104-00-06-50-12-05 3300 XL 8 mm Proximity Probe

What Is the Bently Nevada 330104-00-06-50-12-05?

When your rotating machinery experiences unexpected vibration, how do you ensure accurate and reliable measurement? The Bently Nevada 330104-00-06-50-12-05 is a 3300 XL 8 mm proximity probe designed for precise shaft displacement and vibration monitoring in critical industrial applications. This metric probe features an M10 x 1 thread, a 5.0-meter (16.4 feet) cable, and comes with CSA, ATEX, and IECEx approvals for use in hazardous environments. Its robust construction and proven 3300 XL series technology make it a trusted choice for protecting turbines, compressors, and pumps.

Technical Specifications Breakdown

Probe Design and Materials

The 330104-00-06-50-12-05 uses a polyphenylene sulfide (PPS) tip material and an AISI 303 or 304 stainless steel case, ensuring durability in harsh conditions. The unthreaded length is 00 mm, the overall case length is 60 mm, and the total length option is 5.0 meters. The probe case thread is M10x1 with a maximum thread engagement of 15 mm.

Electrical Performance

The nominal probe DC resistance (RPROBE) from center conductor to outer conductor is 8.73 ± 0.50 Ω for the 5.0 m probe. The linear range is 2 mm (80 mils), beginning at approximately 0.25 mm (10 mils) from the target, and extending from 0.25 to 2.3 mm (10 to 90 mils) (approximately –1 to –17 Vdc). The recommended gap setting for radial vibration is -9 Vdc [approximately 1.27 mm (50 mils)].

Environmental Ratings

The standard probe operates and stores from -52°C to +177°C (-62°F to +350°F). An extended temperature range probe is also available for the probe tip up to +218°C and cable up to +260°C. The probe exhibits less than a 3% change in Average Scale Factor (ASF) when tested in 93% humidity per IEC standard 68 2 3 for up to 56 days.

Industry Applications

Turbine and Compressor Protection

In steam turbines and centrifugal compressors, the 330104-00-06-50-12-05 provides continuous shaft vibration and position monitoring. Its 2 mm linear range and -9 Vdc recommended gap setting ensure accurate readings even under varying load conditions. The CSA, ATEX, and IECEx approvals allow installation in Zone 0 and Zone 2 hazardous areas when paired with appropriate barriers or isolators.

Pump and Motor Monitoring

For large pumps and electric motors, this 8 mm proximity probe detects early signs of bearing wear or misalignment. The 5.0-meter cable length is designed for use with the 5 meter Proximitor sensor only, simplifying system integration. The PPS tip and stainless steel case resist corrosion in wet or chemically aggressive environments.

Installation and Setup Guidance

When installing the 330104-00-06-50-12-05, ensure the probe is mounted with the M10x1 thread engaging no more than 15 mm. Use 0.2 to 1.5 mm² (16 to 24 AWG) field wiring, preferably a 3-conductor shielded triad cable with tinned ends. The maximum field wiring length between the Proximitor sensor and the monitor is 305 meters (1,000 feet). Refer to the frequency response graphs (Figures 10 and 12) for signal rolloff at high frequencies with longer wiring. Set the gap to -9 Vdc for radial vibration applications.

Maintenance and Reliability

The 3300 XL 8 mm probe is designed for long-term reliability. The probe sealing material uses a Viton® O-ring to seal differential pressure between the tip and case. Note that probes are not pressure tested before shipment. Exposing the probe to temperatures below -34°C (-30°F) may cause premature failure of the pressure seal. Regular inspection of the cable and connector for damage is recommended. The miniature coaxial ClickLoc connector and FluidLoc cable provide secure connections in demanding environments.

Selection Guide and Purchasing Advice

Before ordering, verify that the 330104-00-06-50-12-05 matches your system requirements: 8 mm probe, M10x1 thread, 5.0 m cable, and agency approvals (CSA, ATEX, IECEx). This probe is designed for use with the 5 meter Proximitor sensor only. For replacement or new installations, ensure compatibility with your existing Bently Nevada monitoring system. plcmatrix.com offers this model along with expert support to help you select the right configuration for your application. Contact us for current availability and lifecycle status.