Product Introduction
When probe failures lead to unplanned turbine shutdowns, the Bently Nevada 330708-00-10-10-01-05 3300 XL 11 mm Proximity Probe provides reliable vibration monitoring in harsh industrial environments. This high-performance probe is engineered for accurate shaft displacement measurement, featuring a polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case for chemical resistance and mechanical strength. The 330708-00-10-10-01-05 is part of the 3300 XL family, designed to deliver consistent performance in applications ranging from steam turbines to compressors.
Technical Specifications
The Bently Nevada 330708-00-10-10-01-05 3300 XL 11 mm Proximity Probe incorporates precision materials and construction. Key specifications include:
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 304 stainless steel (SST)
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Probe Cable: 75 Ω triaxial, fluoroethylene propylene (FEP) insulated cable (available in 1, 5, or 9 meter lengths)
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Operating and Storage Temperature: -51°C to +177°C (-60°F to +351°F)
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Probe Case Thread: 5/8-18 UNF
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Maximum Thread Engagement: 0.938 inches
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Probe Case Torque (maximum rated): 45.2 N·m (400 in·lb); recommended 15.2 N·m (133 in·lb)
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Connector Torque (maximum): 0.565 N·m (5 in·lb)
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Minimum Bend Radius: 25.4 mm (1.0 in)
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DC Resistance (1 meter probe): 5.9 ± 0.5 ohms (center conductor to outer conductor)
These specifications ensure the 330708-00-10-10-01-05 meets rigorous demands for vibration monitoring in rotating machinery.
Installation and Mounting Guidelines
Proper installation is critical for accurate readings and long probe life. The Bently Nevada 330708-00-10-10-01-05 3300 XL 11 mm Proximity Probe uses a 5/8-18 UNF thread. Ensure the mounting hole depth does not exceed 0.938 inches (maximum thread engagement) to avoid mechanical interference. Tighten the probe case to the recommended torque of 15.2 N·m (133 in·lb) using a calibrated torque wrench. The miniature coaxial ClickLoc connector requires only finger-tight torque, with a maximum of 0.565 N·m (5 in·lb). Maintain a minimum bend radius of 25.4 mm on the cable to prevent damage to the FEP insulation.
Maintenance and Reliability Tips
To maximize the service life of the Bently Nevada 330708-00-10-10-01-05 3300 XL 11 mm Proximity Probe, avoid exposing it to temperatures below -34°C (-30°F), as this can cause premature failure of the pressure seal. The probe is designed to seal differential pressure between the tip and case using a Viton O-ring. While not pressure tested prior to shipment, the seal is rated for typical industrial conditions. Regular inspection of the cable and connector for wear or corrosion is recommended. Check the connector torque annually and re-tighten if necessary.
Troubleshooting Common Issues
The Bently Nevada 330708-00-10-10-01-05 3300 XL 11 mm Proximity Probe may encounter failures due to overtightening or thermal stress. If signal loss occurs, inspect the connector for damage; use only finger-tight torque to avoid cracking the coaxial connection. For intermittent readings, verify the cable bend radius does not exceed the recommended 25.4 mm. If the pressure seal fails, confirm the probe has not been exposed to sub-34°C temperatures. Always use the recommended mounting depth and torque values to prevent thread galling or probe case deformation.