What Is the Bently Nevada 330707-01-20-10-02-00?
In demanding industrial environments, proximity probes face constant exposure to temperature extremes, pressure variations, and mechanical stress. The Bently Nevada 330707-01-20-10-02-00 3300 XL 11 mm Proximity Probe addresses these challenges with a robust design engineered for reliable shaft vibration and position measurement. This probe features a 5/8-18 UNF thread, 0.1 in unthreaded length, 2.0 in overall case length, and a 1.0 metre total length with a miniature coaxial ClickLoc connector. Made in the USA, it delivers precise performance for critical rotating machinery.
Technical Specifications Breakdown
The 330707-01-20-10-02-00 utilizes a polyphenylene sulfide (PPS) probe tip and an AISI 304 stainless steel case, ensuring durability in harsh conditions. Key specifications derived from the product data include:
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Temperature Range: Operating and storage from -52°C to +177°C (-62°F to +351°F). Note: exposing the probe below -34°C may cause premature pressure seal failure.
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Probe DC Resistance: At 1.0 m length, the resistance from center conductor to outer conductor is 5.9 ± 0.5 ohms.
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Probe Case Torque: Maximum rated torque is 45.2 N·m (400 in·lb), recommended at 15.2 N·m (133 in·lb) for 5/8-18 and 1/2-20 threads.
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Connector Torque: Finger tight recommended; maximum 0.565 N·m (5 in·lb).
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Minimum Bend Radius: 25.4 mm (1.0 in) with or without stainless steel armor.
These parameters ensure the 330707-01-20-10-02-00 maintains signal integrity under mechanical and thermal stress.
Real-World Applications
In steam turbine monitoring, the Bently Nevada 330707-01-20-10-02-00 provides reliable shaft displacement data despite high vibration and temperature swings. Its 75 Ω triaxial FEP-insulated cable (available in 1, 5, or 9 metres) resists moisture and chemicals common in power generation plants. For compressor applications, the probe’s robust pressure seal—designed to seal differential pressure between tip and case—prevents false readings caused by process leaks. The probe’s PPS tip withstands harsh lubricants, extending service life in oil and gas environments.
Installation & Setup Guidance
Mount the 330707-01-20-10-02-00 with proper thread engagement: maximum 0.938 in for 5/8-18 thread, 24 mm for M16x1.5, and 21 mm for M14x1.5. Apply recommended torque (15.2 N·m) to avoid case damage. Use finger tight for the connector to prevent over-torquing. Ensure the cable bend radius does not exceed 25.4 mm to avoid signal degradation. For pressure-critical applications, consult the factory for optional pressure seal testing.
Troubleshooting Common Issues
A frequent problem with proximity probes is signal drift due to cable damage. The 330707-01-20-10-02-00 uses a robust triaxial FEP cable which resists abrasion. If resistance readings deviate from 5.9 ± 0.5 ohms, inspect cable continuity. Another common issue is pressure seal failure at low temperatures; avoid operating below -34°C (-30°F) for extended periods. Ensure the probe tip and case materials (PPS and 304 SST) are compatible with the monitored medium to prevent chemical attack.
Maintenance & Reliability
Routinely inspect the 330707-01-20-10-02-00 for signs of cable wear, connector corrosion, or thread galling. Given its wide temperature tolerance and stainless steel construction, the probe typically requires minimal maintenance. Replacing the O-ring (Viton) periodically can sustain pressure seal integrity. This reliability reduces unplanned downtime, making the Bently Nevada 330707-01-20-10-02-00 a cost-effective choice for continuous machinery protection.
Selection Guide & Purchasing Advice
When ordering the 330707-01-20-10-02-00, verify that the total length and connector type match your application (this variant includes a miniature coaxial ClickLoc connector). For custom pressure tests or alternative cable lengths, contact the manufacturer. As a trusted partner, UBEST Automation (ubest101) supplies genuine Bently Nevada 330707-01-20-10-02-00 probes with verified specifications and fast shipping.