Product Overview
When rotating machinery vibration leads to unplanned downtime, the Bently Nevada 330709-000-070-50-11-00 3300 XL 11 mm Proximity Probe delivers precise, non-contact displacement measurement. This sensor is integral to condition monitoring systems in turbines, compressors, and pumps, providing early warning of shaft vibration and position changes. Its robust construction with a PPS tip and stainless steel case ensures reliable performance in harsh industrial environments.
Technical Specifications
| Parameter |
Value |
| Probe Length |
5.0 meters (16.4 ft) |
| Thread Size |
M16 x 1.5 |
| Operating Temperature |
-52°C to +177°C |
| Probe Case Material |
AISI 304 stainless steel |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Cross-talk Min. Target Diameter |
30.5 mm flat, 152 mm shaft |
| Max. Thread Engagement |
24 mm |
| Recommended Torque |
21.1 N·m |
| Maximum Torque |
63.3 N·m |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
Failure Mode Analysis
The Bently Nevada 330709-000-070-50-11-00 3300 XL 11 mm Proximity Probe addresses common vibration sensor failures through careful design. Its cross-talk limitation ensures accurate readings on shafts as small as 152 mm diameter, preventing false signals. The PPS tip withstands temperatures up to +177°C without degradation, reducing drift over time. Additionally, the specified maximum torque of 63.3 N·m prevents thread stripping, a frequent cause of probe replacement. The temperature schedule further clarifies safe operating ranges for hazardous area classification, minimizing the risk of thermal damage in EPL Ga, Gb, Gc, and Dc environments.
Installation & Setup Guidance
Mount the 330709-000-070-50-11-00 using the M16x1.5 thread with maximum engagement of 24 mm. Apply the recommended torque of 21.1 N·m (187 in·lb) to secure the probe without overstressing. Maintain a minimum bend radius of 25.4 mm for the cable to prevent internal conductor breakage. For five-meter probes like this one, pair exclusively with the five-meter Proximitor sensor as stated in the design note. Ensure the target surface meets the minimum flat diameter of 30.5 mm (1.2 in) to avoid cross-talk interference.
Maintenance & Reliability
Regularly inspect the probe cable for wear, particularly at the connector and bend points. The FluidLoc cable and miniature coaxial ClickLoc connector provide secure, moisture-resistant connections. Avoid exposing the probe to temperatures below -34°C (-30°F) as this may cause premature seal failure. Follow the temperature schedule for hazardous area operation: for T1 to T5 classifications, ensure ambient temperature stays within defined limits (e.g., T2: -55°C to +177°C). The 330709-000-070-50-11-00 is engineered for long service life under these conditions, reducing total cost of ownership in continuous monitoring applications.
Selection Guide & Purchasing Advice
When ordering, verify total probe length (5.0 m), unthreaded length (0 mm), and overall case length (70 mm). The suffix 11 indicates the miniature coaxial ClickLoc connector with connector protector and FluidLoc cable. Agency approval is not required for this variant. For critical spares, trust UBEST Automation (ubest101) to supply genuine Bently Nevada 330709-000-070-50-11-00 probes, ensuring compatibility with your existing 3300 XL system. Contact us for application-specific recommendations on mounting accessories or extension cables.