Product Overview
When vibration monitoring systems face harsh conditions, the Bently Nevada 330709-000-040-10-02-05 3300 XL 11 mm Proximity Probe delivers precise, reliable measurements. This probe is part of the 3300 XL series, engineered for continuous monitoring of rotating machinery. It features a M16x1.5 thread design, 40 mm overall case length, and a 1.0 meter miniature coaxial ClickLoc connector cable. The probe tip is made of Polyphenylene sulfide (PPS), and the case is AISI 304 stainless steel, ensuring durability in demanding environments.
Key Specifications
- Probe DC Resistance: 5.9 ± 0.5 ohms (1.0 m length)
- Operating Temperature Range: -52°C to +177°C (-62°F to +351°F)
- Probe Case Thread: M16x1.5, maximum thread engagement 24 mm
- Recommended Torque: 21.1 N·m (187 in·lb) for probe case
- Cross-talk limitation: Recommended minimum flat surface diameter 30.5 mm, shaft diameter 152 mm
Failure Mode Prevention
Common failure modes in proximity probes include signal degradation from cross-talk, mechanical damage from over-torquing, and seal failure from temperature extremes. The Bently Nevada 330709-000-040-10-02-05 addresses these through its design: the 75 Ω triaxial FEP cable minimizes cross-talk, the recommended torque of 21.1 N·m prevents case cracking, and the wide temperature range accommodates severe thermal cycling. The probe's connector-to-connector torque limit of 0.565 N·m protects connector integrity. For best reliability, avoid exposing the probe to temperatures below -34°C (-30°F) to prevent premature pressure seal failure.
Industry Applications
The Bently Nevada 330709-000-040-10-02-05 is ideal for vibration monitoring on turbines, compressors, and pumps. In a steam turbine application, its 5.9 ohm resistance ensures consistent signal strength over 1.0 meter cable runs. Used in large-diameter shaft monitoring, the probe's cross-talk limitation of 152 mm minimum shaft diameter provides accurate gap measurements. Its temperature classifications (T1 to T5 for EPL Ga and Gc) suit hazardous area installations.
Installation & Setup Guidance
Mount the probe using M16x1.5 threads with a maximum engagement of 24 mm. Apply a torque of 21.1 N·m (187 in·lb) to secure the probe case—do not exceed 63.3 N·m. For the connector, tighten finger-tight only; maximum torque is 0.565 N·m. Minimum bend radius for the cable is 25.4 mm (1.0 inch). Ensure the target surface is flat and of proper diameter to avoid cross-talk. Verify probe resistance before installation: center conductor to outer conductor should be 5.9 ± 0.5 ohms for 1.0 m probe.
Maintenance & Reliability
Inspect the probe cable for kinks or wear, especially near the connector. Clean the probe tip with a soft cloth; avoid solvents that could damage the PPS material. Periodically check torque on the probe case if the machine experiences vibration. The probe can withstand storage temperatures from -52°C to +177°C, but extended exposure below -34°C may degrade the pressure seal. For continuous reliability, adhere to the temperature schedules provided for each EPL classification.
Selection Guide
Before purchasing the Bently Nevada 330709-000-040-10-02-05, verify your system's cable length requirements (1.0 m in this variant) and connector type (miniature coaxial ClickLoc). This probe is unarmored with M16x1.5 thread. Ensure your mounting adapter matches the thread and length. For assistance, contact UBEST Automation (ubest101) for detailed specifications and compatibility checks.