Bently Nevada 330104-03-07-05-02-05 3300 XL 8 mm Proximity Probe, Metric

Product Introduction

When unplanned downtime strikes a critical rotating machine, the root cause often lies in undetected vibration or shaft displacement. The Bently Nevada 330104-03-07-05-02-05 3300 XL 8 mm Proximity Probe provides precise, non-contact measurement of shaft position and vibration, enabling early fault detection and preventing catastrophic failures. Designed for permanent installation in demanding environments, this metric probe delivers reliable data for condition monitoring and protection systems.

Technical Specifications Breakdown

The 330104-03-07-05-02-05 probe features a 0.5 meter (1.6 feet) total length with a miniature coaxial ClickLoc connector and standard cable. Its unthreaded length is 30 mm, and the overall case length is 70 mm. The probe tip material is polyphenylene sulfide (PPS), while the case is made of AISI 303 or 304 stainless steel (SST). The probe case thread is M10x1, with a maximum thread engagement of 15 mm. The nominal probe DC resistance (RPROBE) from center conductor to outer conductor is 7.45 ± 0.50 Ω at 0.5m length. The linear range is 2 mm (80 mils), starting at approximately 0.25 mm (10 mils) from the target, with a recommended gap setting for radial vibration of -9 Vdc [approximately 1.27 mm (50 mils)].

Industry Applications

This proximity probe is engineered for continuous monitoring of radial vibration and axial position in turbomachinery, compressors, pumps, and large electric motors. In a typical steam turbine application, the 330104-03-07-05-02-05 mounts directly into bearing housings to measure shaft displacement relative to the bearing. Its robust stainless steel case and PPS tip withstand oil mist, moisture, and high temperatures up to +177°C (+350°F) standard, or up to +218°C (+425°F) for the probe tip in extended temperature range versions. The probe also supports intrinsically safe installation when used with zener barriers per drawing 141092 or galvanic isolators, making it suitable for hazardous areas classified as Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga.

Installation & Setup Guidance

Proper installation is critical for accurate readings. Use 3-conductor shielded triad cable with tinned field wiring, sized 0.2 to 1.5 mm² (16 to 24 AWG). The maximum field wiring length between the 3300 XL Proximitor Sensor and the monitor is 305 meters (1,000 feet). For radial vibration, set the initial gap to approximately -9 Vdc, which corresponds to about 1.27 mm (50 mils) from the target. Ensure the probe tip is clean and free of debris before mounting. The M10x1 thread allows secure installation into standard tapped holes; do not exceed 15 mm thread engagement to avoid mechanical interference.

Maintenance & Reliability

Routine inspection of the probe cable and connector is recommended to ensure signal integrity. The probe is designed to seal differential pressure between the tip and case using a Viton® O-ring, but it is not pressure tested prior to shipment. Exposing the probe to temperatures below -34°C (-30°F) may cause premature failure of the pressure seal. For extended service life, verify that the operating environment stays within the standard temperature range of -52°C to +177°C (-62°F to +350°F). The probe's relative humidity tolerance is excellent, with 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.

Selection Guide & Purchasing Advice

Before ordering, confirm that the 330104-03-07-05-02-05 matches your system requirements: M10x1 thread, 0.5m cable length, and ClickLoc connector. This probe includes agency approvals for CSA, ATEX, and IECEx, ensuring compliance with international safety standards. For replacement or new installations, verify compatibility with your existing Bently Nevada 3300 XL Proximitor and monitor system. As a trusted supplier, plcmatrix.com offers this probe along with expert support to help you select the correct configuration for your application. Please verify current lifecycle status and availability with plcmatrix.com before ordering.