Product Introduction
The Bently Nevada 330708-00-24-90-11-00 is a 3300 XL 11 mm Proximity Probe designed for precise vibration and position monitoring in critical rotating machinery. This probe is part of the proven 3300 XL series, offering robust performance in harsh environments. With a 9.0-meter cable length and miniature coaxial ClickLoc connector, it provides reliable signal transmission. The probe tip material is polyphenylene sulfide (PPS), and the case is AISI 304 stainless steel, ensuring durability. Operating temperature range is -52°C to +177°C, and the probe withstands differential pressure seals. The 330708-00-24-90-11-00 is ideal for applications requiring long-term stability and accuracy.
Key Features & Technical Details
The 330708-00-24-90-11-00 offers a 75 Ω triaxial cable with FEP insulation. Its resistance from center conductor to outer conductor is 8.5 ± 1.1 Ω at 9.0 meters. The probe case thread is 5/8-18 UNF, with a maximum thread engagement of 0.938 inches. Recommended torque is 15.2 N•m (133 in•lb), and maximum rated torque is 45.2 N•m (400 in•lb). The connector-to-connector torque is finger tight, maximum 0.565 N•m (5 in•lb). Minimum bend radius is 25.4 mm (1.0 inch). The probe is designed without armor and is made in the USA.
Failure Mode Analysis: Preventing Probe Failures
In vibration monitoring, common failures include cable damage, temperature extremes, and pressure seal leaks. The Bently Nevada 330708-00-24-90-11-00 addresses these with a robust cable design and Viton O-ring seal. The cable withstands temperatures from -52°C to +177°C, but note that exposure below -34°C may cause premature seal failure. The PPS tip resists wear, and the stainless steel case prevents corrosion. For high-pressure applications, contact UBEST Automation for custom pressure testing. Regular inspection of the cable and connector prevents signal degradation.
Application Scenarios
This probe is commonly used in steam turbines, compressors, and pumps for shaft vibration and thrust position monitoring. In a gas turbine, the 330708-00-24-90-11-00 accurately measures radial vibration, enabling early fault detection. In centrifugal compressors, the probe's long cable length (9.0 m) allows flexible installation near the bearing housing. Its wide temperature range suits both outdoor and high-heat environments. The miniature ClickLoc connector simplifies field replacement, reducing downtime.
Installation & Setup Guidance
Mount the probe with the specified torque (15.2 N•m) to avoid thread damage. Ensure the probe is not over-tightened beyond 45.2 N•m. The 5/8-18 thread requires a maximum engagement of 0.938 inches. Use the recommended finger-tight torque for the connector, max 0.565 N•m. Route the cable with a minimum bend radius of 25.4 mm to prevent internal damage. For best performance, secure the cable away from heat sources and sharp edges. The probe is not pre-pressure tested; if needed, request test from manufacturer.
Maintenance & Reliability
Inspect the cable and connector periodically for wear or damage. The Viton O-ring should be checked for cracks or deformation, especially if the probe operates near temperature extremes. Clean the probe tip with a soft cloth; avoid abrasive materials. Store the probe in a clean, dry environment between -51°C and +177°C. The 330708-00-24-90-11-00 offers high reliability with proper maintenance, reducing unplanned downtime.
Selection Guide & Purchasing Advice
When selecting this probe, verify thread compatibility (5/8-18 UNF) and cable length (9.0 m). Ensure the target material and gap settings align with your monitoring system. For assistance, contact UBEST Automation at ubest101. They provide genuine Bently Nevada parts with fast shipping. Always confirm the part number 330708-00-24-90-11-00 matches your requirements.