Bently Nevada 330104-16-21-05-01-05 3300 XL 8 mm Proximity Probe, Metric

Product Introduction

When machinery vibration threatens uptime, the Bently Nevada 330104-16-21-05-01-05 3300 XL 8 mm Proximity Probe delivers precise displacement measurement for critical rotating equipment. This metric probe is part of the trusted 3300 XL series, designed for continuous monitoring in harsh industrial environments. With a polyphenylene sulfide (PPS) tip and AISI 303 or 304 stainless steel case, it withstands demanding conditions while providing reliable data for predictive maintenance programs.

Technical Specifications Breakdown

The 330104-16-21-05-01-05 offers a linear range of 2 mm (80 mils), starting at approximately 0.25 mm (10 mils) from the target and extending to 2.3 mm (90 mils). This corresponds to a voltage output of approximately –1 to –17 Vdc. The recommended gap setting for radial vibration is -9 Vdc, roughly 1.27 mm (50 mils). The probe's nominal DC resistance (RPROBE) is 7.45 ± 0.50 ohms for the 0.5-meter length. Operating temperature spans –52°C to +177°C (–62°F to +350°F) for standard probes, with extended range options available for the tip and cable.

Industry Applications

This proximity probe excels in monitoring radial vibration and axial position of turbines, compressors, pumps, and motors. In a steam turbine application, the 330104-16-21-05-01-05 provides continuous shaft displacement data, enabling early detection of bearing wear or imbalance. For centrifugal compressors, its linear range and stable output help operators maintain safe operating conditions and avoid unplanned shutdowns. The probe's CSA, ATEX, and IECEx approvals make it suitable for hazardous area installations.

Installation & Setup Guidance

Proper installation ensures accurate readings. The probe features an M10 x 1 thread with a maximum thread engagement of 15 mm. Use field wiring of 0.2 to 1.5 mm² (16 to 24 AWG) with a 3-conductor shielded triad cable. Maximum cable length between the 3300 XL Proximitor Sensor and the monitor is 305 meters (1,000 feet). For radial vibration measurement, set the gap to approximately –9 Vdc. The miniature coaxial ClickLoc connector with connector protector simplifies secure connection. Always verify the target material and surface finish per manufacturer guidelines.

Maintenance & Reliability

Designed for long service life, the 3300 XL probe requires minimal routine maintenance. The Viton O-ring seals differential pressure between the tip and case, but probes are not pressure tested before shipment. Exposing the probe to temperatures below –34°C (–30°F) may cause premature failure of the pressure seal. The probe's relative humidity performance shows less than a 3% change in Average Scale Factor (ASF) when tested at 93% humidity per IEC standard 68-2-3 for up to 56 days. Periodic inspection of the cable and connector for damage is recommended.

Selection Guide & Purchasing Advice

When selecting a replacement or new probe, verify the unthreaded length (160 mm), overall case length (210 mm), and total length (0.5 meter) match your application. The connector and cable option (miniature coaxial ClickLoc with standard cable) and agency approvals (CSA, ATEX, IECEx) are pre-configured in this model. For availability and lifecycle status, contact plcmatrix.com, a trusted supplier of Bently Nevada automation components. They offer expert guidance to ensure you receive the correct part for your monitoring system.