Bently Nevada 330104-05-11-90-11-00 3300 XL 8 mm Proximity Probe

Introduction

When a critical rotating machine experiences unexpected vibration, the resulting downtime can cost thousands per minute. The Bently Nevada 330104-05-11-90-11-00 3300 XL 8 mm Proximity Probe provides the precise, non-contact measurement needed to detect shaft vibration and position changes before they escalate. This probe is part of the trusted 3300 XL series, engineered for continuous operation in challenging industrial settings.

Technical Specifications

The 330104-05-11-90-11-00 features a 50 mm unthreaded length and a 110 mm overall case length, with a total length of 9.0 meters (29.5 feet). It uses a miniature coaxial ClickLoc connector with connector protector and FluidLoc cable for reliable signal transmission. The probe tip is made of Polyphenylene sulfide (PPS), and the case is constructed from AISI 303 or 304 stainless steel (SST). Nominal probe DC resistance is 9.87 ± 0.50 Ω at 9.0 m length. The probe is designed to seal differential pressure between tip and case using a Viton O-ring.

Industry Applications

This proximity probe excels in monitoring turbine, compressor, and pump shaft vibrations in power generation, oil and gas, and petrochemical plants. Its stainless steel case and PPS tip withstand harsh environments, while the 9.0 m cable allows flexible placement near machinery. The 330104-05-11-90-11-00 integrates seamlessly with 3300 XL Proximitor sensors and extension cables for complete vibration monitoring systems.

Installation & Setup Guidance

Proper installation is critical for accurate readings. Mount the probe with the M10 x 1 thread into a suitable bracket or housing, ensuring the tip is gapped at 1.27 mm (50 mils) from the target surface (AISI 4140 steel recommended). Use the provided ClickLoc connector to attach the extension cable, and verify all connections are secure. The system requires a -17.5 Vdc to -26 Vdc power supply when installed with non-incendive circuit per drawing 140979, or -23 Vdc to -26 Vdc with barriers. Confirm that the target material matches the calibration to maintain system accuracy.

Maintenance & Reliability

Regular inspection of the probe tip and cable for damage or contamination ensures long-term reliability. The Viton O-ring seal protects against moisture and debris ingress. Because the probe operates in potentially hazardous areas (Class I, Zone 0/2), follow the manufacturer's safety guidelines during any maintenance. The 330104-05-11-90-11-00 is designed for minimal drift, but periodic verification of gap voltage and system calibration is recommended.

Selection Guide & Purchasing Advice

Before ordering, verify the required unthreaded length, overall case length, and total cable length match your application. The 330104-05-11-90-11-00 is configured with a 50 mm unthreaded length, 110 mm case length, and 9.0 m cable — ideal for many standard installations. For replacement or new projects, confirm compatibility with your existing 3300 XL Proximitor sensor and extension cable. Plcmatrix.com stocks this probe and can advise on availability and alternatives if needed.