Product Overview
Proximity probes are essential for vibration monitoring, but common failures like signal drift or cable damage can cause costly downtime. The Bently Nevada 330709-000-070-50-02-05 3300 XL 11 mm Proximity Probe addresses these issues with robust construction and precise specifications. This probe features an M16x1.5 thread, a 5.0-meter length, and a miniature coaxial ClickLoc connector, ensuring reliable performance in harsh industrial environments.
Technical Specifications
| Parameter |
Value |
| Probe DC Resistance (5.0m length) |
7.2 ± 0.8 ohms |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Cable Specification |
75 Ω triaxial, FEP insulated |
| Probe Case Thread |
M16x1.5 |
| Maximum Thread Engagement |
24 mm |
| Probe Case Torque (M16x1.5) |
21.1 N·m (187 in·lb) |
| Connector-to-Connector Torque (Max) |
0.565 N·m (5 in·lb) |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Cross-talk Limitation (Flat Target) |
Min. 30.5 mm diameter |
| Cross-talk Limitation (Shaft) |
Min. 152 mm diameter |
Real-World Applications
The Bently Nevada 330709-000-070-50-02-05 is ideal for monitoring shaft vibration in steam turbines, compressors, and pumps. Its wide temperature range and rugged stainless steel case ensure reliable performance in high-heat and high-pressure environments. The PPS probe tip resists chemical attack, making it suitable for hydrocarbon processing. In compressor applications, the cross-talk limitation ensures accurate readings even with closely spaced rotors.
Installation Guidance
Proper installation is critical. Use the recommended probe case torque of 21.1 N·m (187 in·lb) for the M16x1.5 thread. Do not exceed a connector-to-connector torque of 0.565 N·m (5 in·lb) to avoid damaging the ClickLoc connector. Maintain a minimum bend radius of 25.4 mm (1.0 in) to prevent cable damage. Ensure the target surface meets the minimum diameter requirements (30.5 mm for flat surfaces, 152 mm for shafts) to avoid cross-talk errors.
Troubleshooting Common Issues
Signal drift often results from incorrect torque or temperature extremes. Exposing the probe below -34°C (-30°F) may cause premature pressure seal failure. If readings are unstable, verify the cable is not bent beyond the minimum radius and that the connector is finger-tight plus no more than 0.565 N·m. The probe resistance should measure 7.2 ± 0.8 ohms between center and outer conductors. For cross-talk, confirm the target size meets specifications.
Selection Guide
When ordering the Bently Nevada 330709-000-070-50-02-05, verify the total length matches your Proximitor sensor (five meter probes require a five meter Proximitor). For specialized applications, consider armor options or connector variants. UBEST Automation offers genuine Bently Nevada parts with fast shipping and technical support. Contact us for detailed specifications or compatibility advice.