Product Introduction
When pressure seal failures or cable degradation threaten uptime in rotating machinery monitoring, the Bently Nevada 330708-00-10-90-01-05 3300 XL 11 mm Proximity Probe delivers robust performance. Designed for high-temperature environments and harsh industrial conditions, this probe withstands thermal cycling and mechanical stress. Its PPS tip and AISI 304 stainless steel case resist corrosion and wear, making it ideal for long-term vibration measurement.
Failure Mode Analysis & Reliability
Common field failures in proximity probes include pressure seal leaks at low temperatures and cable fatigue from repeated bending. The Bently Nevada 330708-00-10-90-01-05 mitigates these risks with a Viton O-ring seal and a triaxial FEP-insulated cable rated for -51°C to +177°C. The recommended 15.2 N·m (133 in·lb) case torque prevents overtightening damage, while the miniature coaxial ClickLoc connector ensures secure signal transmission. For installations below -34°C, allow gradual temperature stabilization to avoid premature seal failure.
Technical Specifications
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Probe Length: 9.0 m (29.5 ft) total length
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DC Resistance (RPROBE): 8.5 ± 1.1 Ω
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Case Thread: 5/8-18 UNF
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Max Thread Engagement: 0.938 in (23.8 mm)
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Recommended Case Torque: 15.2 N·m (133 in·lb)
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Operating Temperature: -51°C to +177°C (-60°F to +351°F)
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Probe Cable: 75 Ω triaxial, FEP insulated
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Connector: Miniature coaxial ClickLoc with protector
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Shipping Weight: 0.17 kg
Industry Applications
In critical turbine and compressor monitoring, the Bently Nevada 330708-00-10-90-01-05 delivers precise shaft displacement measurements. Its 11 mm sensing face and 5/8-18 thread allow direct replacement in standard proximity probe holders. For paper mill roller bearings or refinery pump vibration, the PPS tip resists chemical attack. The high-temperature rating suits gas turbine exhaust frame monitoring where ambient heat exceeds 150°C.
Installation & Setup Guidance
Use a calibrated torque wrench to tighten the probe case to 15.2 N·m (133 in·lb). Never exceed 45.2 N·m (400 in·lb) maximum. Ensure the thread engagement does not exceed 0.938 in (23.8 mm) to avoid case distortion. For the miniature coaxial ClickLoc connector, tighten finger-tight; maximum torque is 0.565 N·m (5 in·lb). Maintain a minimum bend radius of 25.4 mm (1.0 in) on the cable to prevent insulation damage.
Troubleshooting & Common Issues
If output signals drift, verify connector torque and cable integrity. A sudden resistance change (>1.1 Ω from nominal) indicates cable damage or moisture ingress. For pressure seal leaks, inspect the O-ring and allow probe to reach ambient temperature before retightening. The probe is not pressure tested before shipment; contact UBEST Automation for custom pressure seal verification requirements.
Selection Guide & Purchasing Advice
Before ordering, verify your system’s thread type and length requirements. The Bently Nevada 330708-00-10-90-01-05 includes a 9.0 m cable and miniature ClickLoc connector. For extended cable runs, additional extension cables are available. Ensure your monitor accepts 75 Ω triaxial input. For pricing and lead time, visit ubest101 or contact our sales team.