Description

Designed for non-contact shaft vibration and displacement measurements, the Bently Nevada 330101-00-20-15-02-05 is a high-precision 8 mm proximity probe belonging to the 3300 XL transducer series. This specific model features a 3/8-24 UNF threaded body with an unthreaded length of 0.0 inches (0 mm), a total case length of 2.0 inches (51 mm), a 1.5-meter (4.9 feet) standard cable with a miniature coaxial ClickLoc connector, and CSA, ATEX, and IECEx hazardous area approvals. By offering a standard unarmored coaxial cable in a 1.5-meter length, this configuration bridges the gap between traditional 1.0 m and 2.0 m systems, optimizing cable routing within bearing housings while avoiding excessive slack.

The probe operates on the eddy-current principle to measure the distance (gap) between the probe tip and a conductive target, such as a machine shaft. When paired with a 3300 XL Proximitor sensor and a compatible extension cable, the system delivers a linear voltage output proportional to the gap. This output feeds directly into machinery protection racks, such as the Bently Nevada 3500 system, to enable real-time vibration monitoring, thrust position measurement, and tachometer speed sensing. Its construction is designed to withstand harsh industrial environments, offering high resistance to chemical contamination and thermal degradation commonly found in machine casings.

Features

• Proximity probe with 8 mm tip diameter optimized for standard displacement range and high resolution.
• Fully integrated 3/8-24 UNF threaded body constructed without protective armor, ideal for internal mounting or conduit runs.
• ClickLoc miniature coaxial connector provides a secure, vibration-proof connection with low signal loss.
• Standard cable insulation offers excellent thermal stability and resistance to lubricating oils.
• Approved with the -05 option covering CSA, ATEX, and IECEx certifications for safe deployment in hazardous zones.
• Directly compatible with the 3300 XL Proximitor sensor and standard extension cables.

Applications

This proximity probe is typically deployed in heavy industrial environments to safeguard rotating machinery. Key applications include:

• Steam and gas turbine shaft vibration and axial position monitoring.
• Compressor and pump rotor displacement and thrust measurement.
• Radial vibration and speed sensing (keyphasor) on high-speed industrial machinery.
• Permanent installations in generator housings, gearboxes, and large electric motors.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure optimal system performance and prevent premature failure, follow standard machinery monitoring installation procedures:

• Mount the probe with the appropriate probe gap set according to system calibration guidelines, typically 1.27 mm (50 mils) for standard applications.
• Avoid excessive tightening of the probe body in the mounting bracket to prevent damage to the threads.
• Route the standard unarmored probe cable using proper shielding, grounding, and routing practices. Use conduit where external physical hazards exist.
• Ensure the ClickLoc coaxial connector is clean and dry. Avoid sharp bends in the cable and maintain the minimum bend radius specified for the 3300 XL system.

Compliance and Certifications

This probe configuration complies with major hazardous area safety standards. Applicable certifications under the -05 option include:

• CSA Certified for hazardous locations
• ATEX Certified for explosive atmospheres (Zone 0, Zone 1, Zone 2)
• IECEx Certified for global safety compliance