Product Overview
When unplanned downtime disrupts production, reliable vibration monitoring is critical. The Bently Nevada 330709-000-050-50-02-00 3300 XL 11 mm Proximity Probe delivers precise shaft displacement measurements to safeguard rotating machinery. This probe is part of the proven 3300 XL series, engineered for demanding industrial applications. Its robust construction and accurate sensing ensure consistent performance even in extreme conditions.
Technical Specifications
| Parameter |
Value |
| Probe DC Resistance (5.0 m length) |
7.2 ± 0.8 ohms (center conductor to outer conductor) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable Specification |
75 Ω triaxial, fluoroethylene propylene (FEP) insulation |
| Probe Case Thread |
M16 x 1.5 |
| Maximum Thread Engagement |
24 mm |
| Probe Case Torque (M16 x 1.5) |
63.3 N·m (560 in·lb) |
| Connector-to-Connector Torque (Maximum) |
0.565 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating Temperature Range |
-52°C to +177°C (-62°F to +351°F) |
| Cross-talk Limitation – Target Size (Flat Surface) |
Minimum 30.5 mm (1.2 in) diameter |
| Cross-talk Limitation – Shaft Diameter |
Minimum 152 mm (6.0 in) |
Real-World Applications
The Bently Nevada 330709-000-050-50-02-00 is ideal for monitoring shaft vibration and position in critical rotating equipment. Common uses include:
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Turbomachinery – Steam and gas turbines benefit from precise radial and axial position tracking, preventing catastrophic failures.
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Compressors – Centrifugal and axial compressors rely on this probe to detect early signs of rub or imbalance.
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Pumps – Large industrial pumps use proximity probes to monitor shaft displacement and predict bearing wear.
The wide temperature range (-52°C to +177°C) makes it suitable for both cold startup and high-heat environments, reducing the risk of seal failure when operated above -34°C as recommended.
Installation & Setup Guidance
Proper installation is key to accurate readings. Follow these guidelines for the Bently Nevada 330709-000-050-50-02-00:
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Mounting Thread – Use the M16 x 1.5 thread. Maximum engagement depth is 24 mm. Do not over-tighten; apply 63.3 N·m torque to the probe case.
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Connector – The miniature coaxial ClickLoc connector should be finger-tight. Maximum torque is 0.565 N·m (5 in·lb) to avoid damage.
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Cable Bending – Maintain a minimum bend radius of 25.4 mm (1.0 in) to prevent cable stress and signal degradation.
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Target Considerations – For flat surfaces, the target must be at least 30.5 mm in diameter. For shaft applications, minimum diameter is 152 mm to avoid cross-talk errors.
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Cable Length – This probe is 5.0 meters long (16.4 feet) and is designed for use with the five-meter Proximitor sensor only. Do not mix cable lengths.
Troubleshooting & Common Issues
To maintain reliable operation, be aware of these potential pitfalls:
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Temperature Exposure – Operating below -34°C can cause premature failure of the pressure seal. If the probe is exposed to such temperatures, inspect the seal before use.
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Cross-talk – Ensure the target size meets the recommended minimums. Inadequate target size leads to erroneous readings, especially in multiple-probe installations.
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Connector Integrity – Loose or overtightened connectors can introduce noise or intermittent signals. Always use the specified torque and avoid contaminating the coaxial connection.
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Cable Damage – The FEP-insulated cable is durable but can be cut or abraded. Routinely check for kinks or wear, especially near the probe tip.
For assistance selecting the correct replacement or upgrade, contact UBEST Automation.