Bently Nevada 330101-20-39-10-02-CN 3300 XL 8 mm Proximity Probe

Description

Optimized for dynamic machinery protection and shaft displacement monitoring, the Bently Nevada 330101-20-39-10-02-CN serves as a high-precision non-contact sensor within the 3300 XL transducer product family. This 8 mm proximity probe delivers linear voltage outputs directly proportional to the distance between the probe tip and the observed conductive target. Engineered with a threadless section and robust stainless steel housing, it provides critical shaft vibration and position feedback for high-speed turbomachinery.

Features

• Unarmored Standard Cable: Features a 1.0-meter coaxial cable designed for installations with dedicated conduit or protective physical tracking.
• ClickLoc Connector: Equipped with a miniature coaxial ClickLoc connection interface, providing consistent contact resistance and vibration resistance.
• Polyphenylene Sulfide (PPS) Tip: Hermetically sealed probe tip resistant to corrosive industrial chemical exposure and lubricating oil submersion.
• 3/8-24 UNF Threads: Standard SAE threading configuration ensures physical compatibility with industrial brackets and sleeve mounts.
• CN Approval Profile: Region-specific hazardous area certification compliance configured for designated national industrial standards.

Applications

• Continuous radial shaft vibration monitoring in steam and gas utility turbines.
• Thrust position and axial displacement tracking on industrial centrifugal compressors.
• Reciprocating compressor rod runout and casing vibration analysis.
• Real-time shaft centerline tracking on high-power cooling tower fans and gearboxes.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

This 1.0-meter probe requires a complementary extension cable and 3300 XL Proximitor Sensor (e.g., 5-meter or 9-meter total system configurations) to operate within calibrated limits. Do not mix 3300 XL 8 mm probes with legacy non-XL 3300 5 mm or 11 mm sensors, as doing so introduces impedance mismatches and severely distorts the transducer calibration curve.

Application Pitfalls & Engineering Notes

To prevent electrical cross-talk, ensure a minimum physical clearance of 40 mm (1.6 inches) between adjacent 8 mm probe tips. When mounting through a machine casing, carefully inspect the 2.0-inch unthreaded length; leaving unthreaded sections inside tight clearances can cause the stainless steel probe body to scrub against the rotor or bracket assemblies during thermal growth periods.

Commissioning & Calibration Tips

Always verify the mechanical gap using a calibrated voltmeter connected to the Proximitor Sensor output. The target nominal gap voltage for standard 4140 steel is -10.0 VDC (corresponding to the midpoint of the 80 mil / 2.0 mm linear range). Ensure the ClickLoc connectors are completely free of dirt and moisture before assembly; use silicone connector protectors or self-fusing tape to preserve long-term signal insulation.

Installation Guidelines