Product Overview
The Bently Nevada 330709-000-080-50-12-00 3300 XL 11 mm Proximity Probe is a precision sensor for critical rotating machinery vibration and position measurement. This model features a 5.0 meter (16.4 feet) total length, M16 x 1.5 thread, and a miniature coaxial ClickLoc connector with FluidLoc cable. Designed for use with matching 5-meter Proximitor Sensors, it ensures accurate gap voltage readings even in harsh environments.
Part of the 3300 XL series, the 330709-000-080-50-12-00 addresses common failure modes such as cross-talk, pressure seal degradation, and cable damage. Its robust construction with a 304 stainless steel case and polyphenylene sulfide (PPS) tip resists corrosion and thermal stress, operating reliably from -52°C to +177°C.
Technical Specifications
| Parameter |
Value |
| Probe DC Resistance (5.0m) |
7.2 ± 0.8 ohms |
| Recommended Minimum Target Diameter |
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) |
| Probe Cable Specification |
75 Ω triaxial, FEP insulated |
| Probe Case Torque (M16x1.5) |
21.1 N·m (187 in·lb) |
| Connector-to-Connector Torque (max) |
0.565 N·m (5 in·lb) |
| Operating/Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
M16 x 1.5 |
| Maximum Thread Engagement |
24 mm |
| Minimum Bend Radius |
25.4 mm (1.0 in) |
Industry Applications
This Bently Nevada 330709-000-080-50-12-00 3300 XL 11 mm Proximity Probe is widely used in turbine, compressor, pump, and motor monitoring systems. Its cross-talk limitation ensures accurate readings on shafts as small as 152 mm diameter, reducing false trip risks. The 5-meter cable length matches standard Proximitor Sensors, simplifying retrofit upgrades.
In chemical processing plants, the probe's wide temperature range and stainless steel case withstand aggressive atmospheres. The FluidLoc cable resists moisture and vibration, preventing intermittent loss of signal – a common failure point in older designs.
Installation & Setup Guidance
Mount the probe using the M16 x 1.5 thread; torque to 21.1 N·m maximum to avoid case damage. For the ClickLoc connector, apply finger-tight torque only (maximum 0.565 N·m). Ensure the cable bend radius stays above 25.4 mm to prevent internal conductor breakage. The probe is not armor-protected – avoid abrasive contact. For optimal performance, use only with a matching 5-meter Proximitor sensor.
Maintenance & Reliability
Regularly inspect the probe cable for cuts or kinks, especially near the connector. Verify DC resistance between center and outer conductors: should be 7.2 ± 0.8 ohms for 5-meter length. If resistance drifts, suspect cable damage or connector corrosion. Avoid exposing the probe to temperatures below -34°C for extended periods, as this may cause premature pressure seal failure.
Troubleshooting Common Issues
Cross-talk or false readings: Verify target surface is at least 30.5 mm diameter and shaft diameter meets 152 mm minimum. If not, reposition probe or use larger target.
Noisy signal: Check connector torque – over-tightening can damage the miniature coaxial connector. Clean contacts with isopropyl alcohol.
Cable breakage: Ensure bend radius is above 25.4 mm and cable is not pinched during installation. Replace if resistance exceeds 8.0 ohms.
Pressure seal failure: Avoid temperature cycles below -34°C. For High-temperature environments, verify probe tip integrity – PPS withstands up to 177°C.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 330709-000-080-50-12-00, confirm that your existing system uses 5-meter Proximitor sensors and M16 x 1.5 mounting threads. The unthreaded length is 0 mm and overall case length is 80 mm – these fixed dimensions suit standard installations. For additional cables or extension cables, verify compatibility with the miniature coaxial ClickLoc connector. UBEST Automation offers genuine Bently Nevada spares at competitive prices, including this 330709-000-080-50-12-00 model. Always source from a trusted supplier like ubest101 to ensure authenticity and full warranty support.