When industrial machinery experiences unexpected vibration, the Bently Nevada 330709-000-080-50-02-05 3300 XL 11 mm Proximity Probe provides the precision needed for early fault detection. This probe is engineered for continuous monitoring of rotating equipment, such as turbines, compressors, and pumps, where reliable data is critical to prevent catastrophic failure.
Product Overview
The Bently Nevada 330709-000-080-50-02-05 is a 3300 XL series 11 mm proximity probe designed for non-contact vibration and position measurement. It features a 5.0 meter cable with a miniature coaxial ClickLoc connector and is approved for multiple agency standards. Constructed with a polyphenylene sulfide (PPS) tip and an AISI 304 stainless steel case, this probe withstands extreme conditions while delivering accurate readings.
Technical Specifications
| Parameter |
Value |
| Probe DC Resistance (5.0 m length) |
7.2 ± 0.8 ohms |
| Cross-talk Limitation – Flat Surface Diameter (min) |
30.5 mm (1.2 in) |
| Recommended Minimum Shaft Diameter |
152 mm (6.0 in) |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Cable Specification |
75 Ω triaxial, FEP insulated |
| Thread Size |
M16 x 1.5 |
| Max Thread Engagement |
24 mm |
| Probe Case Torque (Recommended) |
21.1 N·m (187 in·lb) |
| Connector-to-Connector Torque (Max) |
0.565 N·m (5 in·lb) |
| Temperature Range (Operating & Storage) |
-52°C to +177°C |
Applications and Use Cases
In high-speed rotating machinery, such as steam turbines and centrifugal compressors, the Bently Nevada 330709-000-080-50-02-05 monitors shaft vibration and thrust position. Its 5.0 meter cable length is specifically designed for use with the five meter Proximitor sensor, ensuring signal integrity. The probe's cross-talk limitation is minimized when mounted on shafts with a minimum diameter of 152 mm, making it suitable for large industrial equipment.
Installation and Setup Guidance
Proper mounting of the Bently Nevada 330709-000-080-50-02-05 is essential for accurate data. Use the recommended torque of 21.1 N·m for the probe case. Do not exceed 63.3 N·m maximum torque to avoid damaging the threads. The connector-to-connector torque should be finger tight, with a maximum of 0.565 N·m. Ensure the probe is installed in a location where the ambient temperature stays within -52°C to +177°C to avoid premature seal failure.
Troubleshooting Common Failure Modes
One common failure in proximity probes is cross-talk interference from nearby probes. The Bently Nevada 330709-000-080-50-02-05 addresses this by requiring a minimum flat surface diameter of 30.5 mm and a shaft diameter of 152 mm. Another issue is improper torque, which can lead to signal noise or mechanical damage. Always follow the recommended torque values. Temperature extremes can degrade probe performance; this model is rated for T1 to T5 temperature classifications, covering ambient from -55°C to +232°C depending on classification. Check the probe's DC resistance regularly; if it deviates from 7.2 ± 0.8 ohms, the cable or tip may be damaged.
Selection Guide and Purchasing Advice
Before purchasing the Bently Nevada 330709-000-080-50-02-05, verify that your system uses a five meter Proximitor sensor and that the mounting thread is M16 x 1.5. The probe's 0 mm unthreaded length and 80 mm overall case length suit specific installations. For reliable sourcing, consider UBEST Automation, a trusted supplier of industrial automation spares.