Product Overview
When monitoring rotating machinery in demanding industrial environments, the Bently Nevada 330709-000-050-50-12-00 provides precise vibration data. This 3300 XL 11 mm Proximity Probe is designed for reliable proximity sensing in turbomachinery, compressors, and pumps. With a 5.0-meter total length, M16x1.5 thread, and miniature coaxial ClickLoc connector with FluidLoc cable, the 330709-000-050-50-12-00 ensures consistent performance in harsh conditions.
Key Technical Specifications
The Bently Nevada 330709-000-050-50-12-00 delivers critical performance parameters derived from its construction:
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Probe dc Resistance (5.0m): 7.2 ± 0.8 ohms from center to outer conductor
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Cross-talk Limitation: Recommended minimum target flat surface diameter: 30.5 mm (1.2 in); shaft diameter: 152 mm (6.0 in)
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 304 stainless steel (SST)
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Probe Cable: 75 Ω triaxial, fluoroethylene propylene (FEP) insulated
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Probe Case Torque (M16x1.5): Maximum 63.3 N·m (560 in·lb); Recommended 21.1 N·m (187 in·lb)
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Connector-to-connector torque: Finger tight recommended; max 0.565 N·m (5 in·lb)
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Minimum Bend Radius: 25.4 mm (1.0 in)
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Temperature Range: -52°C to +177°C (-62°F to +351°F) operating and storage
For detailed temperature schedules (EPL Ga, Gc, Dc classifications) refer to the product manual.
Real-World Applications
The Bently Nevada 330709-000-050-50-12-00 excels in applications where reliable shaft vibration and position measurement are critical. Common uses include:
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Steam and gas turbines: Monitoring radial vibration and thrust position to prevent catastrophic failures.
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Centrifugal compressors: Detecting shaft misalignment and bearing wear early.
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Large electric motors and pumps: Providing accurate proximity data for predictive maintenance programs.
Installation and Mounting Guidance
Proper installation of the 330709-000-050-50-12-00 ensures accurate readings. Follow these guidelines:
- Use the recommended torque for the probe case: 21.1 N·m (187 in·lb) to avoid thread damage. Maximum torque is 63.3 N·m (560 in·lb).
- Engage the M16x1.5 thread to a maximum length of 24 mm.
- Apply connector-to-connector torque only to finger tight, never exceed 0.565 N·m (5 in·lb).
- Maintain a minimum bend radius of 25.4 mm (1.0 in) for the cable to avoid internal damage.
- When installing, consider the cross-talk limitation: ensure target surfaces meet the recommended minimum diameters.
Maintenance and Reliability
To maximize service life of the Bently Nevada 330709-000-050-50-12-00, observe the following:
- Avoid exposing the probe to temperatures below -34°C (-30°F) as this may cause premature pressure seal failure.
- Inspect the cable and connector periodically for signs of abrasion or chemical attack.
- Confirm the probe tip (PPS) is free from contamination that could affect proximity measurements.
- Store and operate within the -52°C to +177°C range.
Selection Guide
Before purchasing the 330709-000-050-50-12-00, verify compatibility with your Proximitor sensor (5-meter version required). The integrated miniature coaxial ClickLoc connector ensures easy field replacement. For questions or to place an order, contact UBEST Automation at ubest101. We stock genuine Bently Nevada parts to keep your rotating machinery running smoothly.