Product Introduction
When vibration monitoring systems suffer from unreliable probe signals due to cable wear or connector failure, the Bently Nevada 330708-00-24-50-11-00 3300 XL 11 mm Proximity Probes provide a robust solution. This probe is engineered for critical machinery protection, delivering accurate and consistent displacement measurements. Built with a polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case, it withstands extreme temperatures from -51°C to +177°C. The miniature coaxial ClickLoc connector with connector protector and FluidLoc cable ensures a secure, weather-resistant connection that minimizes signal degradation.
Installation and Setup Guidance
Proper installation is crucial for optimal performance. The probe case thread is 5/8-18 UNF, with a maximum thread engagement of 0.938 inches. Apply a recommended torque of 15.2 N•m (133 in•lb) to the probe case, never exceeding 45.2 N•m (400 in•lb). When connecting the cable, hand-tighten the connector first, then tighten to a maximum torque of 0.565 N•m (5 in•lb). Avoid bending the cable beyond a 25.4 mm (1.0 in) radius to prevent internal damage. Always verify that the probe length matches the five-meter Proximitor sensor — this 330708-00-24-50-11-00 is designed exclusively for five-meter systems.
Maintenance and Reliability
To ensure long-term reliability, regularly inspect the cable for cuts or abrasions, especially near the connector and at entry points. The probe’s sealing material uses a Viton O-ring to maintain differential pressure between tip and case, but it is not pressure-tested before shipment. If your application involves high pressure, contact our custom design department for testing. Avoid operating below -34°C (30°F) for extended periods, as this may cause premature failure of the pressure seal. The 75 Ω triaxial FEP insulated cable provides excellent resistance to chemicals and moisture, but periodic visual checks are recommended.
Troubleshooting and Common Issues
Common problems with proximity probes include erratic readings due to cable damage or connector corrosion. The 330708-00-24-50-11-00 addresses these with a FluidLoc cable that resists fluid ingress and a ClickLoc connector that locks securely. If you encounter signal noise, check that the cable is not routed near high-voltage lines and that the connector is fully seated. Another frequent issue is incorrect gap setting — always set the probe gap according to the Proximitor sensor specifications. For dc resistance verification, the probe length of 5.0 meters should yield 7.2 ± 0.8 ohms from center conductor to outer conductor. If readings deviate, suspect a cable fault.
Selection Guide and Purchasing Advice
When selecting the Bently Nevada 330708-00-24-50-11-00, confirm that your system uses a five-meter Proximitor sensor. This probe comes in a 5.0 meter (16.4 feet) total length with a 2.4-inch overall case length and zero unthreaded length. It is available without armor and without agency approval options. For detailed specifications or to check compatibility with your existing system, contact ubest101 for expert assistance. Our team can help you choose the right probe for your turbomachinery, compressors, or other rotating equipment.