Product Introduction
When unexpected machine downtime threatens production targets, the Bently Nevada 330709-000-030-50-11-00 3300 XL 11 mm Proximity Probe delivers the precise, continuous measurement needed to keep critical rotating assets online. This rugged probe is designed for harsh industrial environments, providing accurate shaft vibration and position data to protect turbines, compressors, pumps, and motors. With its M16x1.5 threaded case and 5.0 meter cable length, the 330709-000-030-50-11-00 integrates seamlessly into new installations or as a direct replacement for existing Bently Nevada proximity probes.
Key Specifications
The Bently Nevada 330709-000-030-50-11-00 3300 XL 11 mm Proximity Probe is built for demanding applications. Its technical characteristics ensure reliable performance under extreme conditions.
| Parameter |
Value |
| Probe dc Resistance (RPROBE) |
7.2 ± 0.8 ohms |
| Probe Tip Material |
Polyphenylene sulfide (PPS) |
| Probe Case Material |
AISI 304 stainless steel (SST) |
| Probe Cable Specification |
75 Ω triaxial, FEP insulated |
| Total Length |
5.0 meters (16.4 feet) |
| Operating & Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Probe Case Thread |
M16 x 1.5 |
| Recommended Probe Case Torque |
21.1 N•m (187 in•lb) |
| Minimum Target Size (Flat Surface) |
30.5 mm (1.2 in) |
| Minimum Shaft Diameter |
152 mm (6.0 in) |
Industry Applications
The 330709-000-030-50-11-00 excels in monitoring shaft vibration and axial position in turbo-machinery. In a steam turbine generator set, this probe provides real-time gap voltage to the Proximitor, triggering alerts before bearing damage occurs. For large centrifugal compressors in petrochemical plants, the probe’s 5.0 meter cable works exclusively with the matching 5 meter Proximitor sensor, ensuring consistent signal integrity. Its wide temperature range (-52°C to +177°C) makes it suitable for both cold outdoor installations and hot compressor cases.
Installation & Setup Guidance
Proper installation of the Bently Nevada 330709-000-030-50-11-00 3300 XL 11 mm Proximity Probe is critical for accurate readings. Use the M16x1.5 threaded case and apply a maximum thread engagement of 24 mm. Torque the probe case to the recommended 21.1 N•m (187 in•lb) using a calibrated torque wrench. For the miniature coaxial ClickLoc connector, tighten finger-tight only; do not exceed 0.565 N•m (5 in•lb). Ensure the probe cable bend radius stays above 25.4 mm (1.0 in) to prevent internal conductor damage. Always mount the probe on a flat target surface at least 30.5 mm in diameter.
Maintenance & Reliability
To maximize service life, inspect the probe tip and cable annually for physical damage or contamination. The PPS tip resists chemical attack, but avoid temperatures below -34°C (30°F) for extended periods as this may cause premature pressure seal failure. The stainless steel case withstands corrosion in most industrial environments. The 330709-000-030-50-11-00 offers long-term reliability, reducing replacement frequency and lowering total cost of ownership for your vibration monitoring system.
Selection Guide & Purchasing Advice
Before purchasing, verify that your Proximitor sensor matches the 5.0 meter probe length (330709-000-030-50-11-00 is designed for use with the five meter Proximitor only). Confirm thread compatibility: this probe uses M16x1.5. If you need an unthreaded length option or different overall case length, check the part numbering system — the 330709 base indicates a 3300 XL 11 mm probe without armor. For reliable supply and technical support, contact UBEST Automation at ubest101. We carry genuine Bently Nevada 330709-000-030-50-11-00 probes backed by our quality assurance.