Product Introduction
The Bently Nevada 330708-00-40-10-02-00 is a 3300 XL 11 mm Proximity Probe designed for precise vibration and position monitoring in rotating machinery. This probe is part of the trusted 3300 XL series and manufactured in the U.S.A. It features a polyphenylene sulfide (PPS) tip and AISI 304 stainless steel case, ensuring durability in harsh industrial environments.
Technical Specifications Breakdown
The Bently Nevada 330708-00-40-10-02-00 offers a 5/8-18 UNF thread with a maximum thread engagement of 0.938 inches. The total probe length is 1.0 metre (3.3 feet) with a miniature coaxial ClickLoc connector and standard cable. Key electrical characteristics include a probe DC resistance of 5.9 ± 0.5 ohms from the center conductor to the outer conductor. The probe case torque is rated at 45.2 N•m maximum, with a recommended 15.2 N•m. The connector-to-connector torque is finger tight, with a maximum of 0.565 N•m. The probe operates and stores from -52°C to +177°C, and the cable is 75 Ω triaxial with FEP insulation.
Installation & Setup Guidance
When installing the Bently Nevada 330708-00-40-10-02-00, ensure the threaded case is engaged to the proper depth (maximum 0.938 inches for 5/8-18 thread). Apply the recommended torque of 15.2 N•m to avoid over-tightening and damaging the pressure seal. The Viton O-ring provides differential pressure sealing between the tip and case, but note the probe is not pressure tested prior to shipment. Avoid exposing the probe to temperatures below -34°C as this may cause premature pressure seal failure. The cable has a minimum bend radius of 25.4 mm (1.0 inch) to maintain signal integrity.
Industry Applications
This Bently Nevada 330708-00-40-10-02-00 proximity probe is ideal for vibration monitoring on pumps, compressors, turbines, and motors. The PPS tip and stainless steel case resist corrosion and wear, making it suitable for refineries, chemical plants, and power generation facilities. In such applications, the probe reliably detects shaft displacement and radial vibration under extreme temperature and pressure conditions.
Maintenance & Reliability
For long-term reliability, regularly inspect the cable and connector for damage. The 75 Ω triaxial FEP cable withstands temperatures up to +177°C, but check for abrasion or kinking near bend points. The pressure seal should be verified periodically, especially if the probe is subjected to thermal cycling. The probe's robust construction minimizes downtime, making the Bently Nevada 330708-00-40-10-02-00 a cost-effective choice for continuous operation.
Selection Guide & Purchasing Advice
Before purchasing, confirm your system requirements: thread size (5/8-18 UNF), total length (1.0 m), and connector type (miniature coaxial ClickLoc). This probe is unarmored and has no agency approval, as indicated by the option codes. If you require longer cable lengths (5 or 9 metres) or armored versions, verify compatibility with your application. For reliable sourcing, consider UBEST Automation (ubest101) for genuine Bently Nevada parts.