Bently Nevada 330101-00-21-10-02-CN 3300 XL 8 mm Proximity Probe

Description

Precision displacement measurements in turbomachinery require rugged, highly reliable sensors. The 330101-00-21-10-02-CN proximity probe is a premium eddy-current sensor manufactured by Bently Nevada as part of the 3300 XL 8 mm series. Designed to measure static and dynamic distances between the probe tip and a conductive target, this non-contact sensor provides crucial shaft vibration, position, and reference data to machinery protection systems.

Engineered for direct installation within machine housings, this specific model is configured with a 0.0-inch unthreaded length and a 2.1-inch overall case length. Signal integrity is maintained via a 1.0-meter (3.3 feet) standard coaxial cable terminated with a miniature coaxial ClickLoc connector. Certified under the CN designation, this probe complies with country-specific safety and explosion protection standards, making it suitable for hazardous deployment environments.

Features

• Precise Eddy-Current Sensing: Standard 8 mm probe tip diameter for consistent voltage-to-distance conversion.
• Rugged Mechanical Design: Fully threaded 2.1-inch case length with no unthreaded portion (0.0 inches) for flush or deep-well mounting.
• Robust Signal Path: Standard cable configuration of 1.0 meter (3.3 feet) minimizing signal attenuation.
• Secure Interconnects: ClickLoc miniature coaxial connector prevents fluid ingress and physical decoupling in high-vibration applications.
• Hazardous Location Ready: Includes CN country-specific agency approvals for explosion-proof and intrinsically safe regions.

Applications

• Steam, gas, and hydro turbine shaft vibration monitoring.
• Centrifugal compressor and high-speed pump rotor position analysis.
• Industrial gearbox thrust and radial bearing wear detection.
• Tachometer and phase reference measurements (Keyphasor).
• Turbine supervisory instrumentation (TSI) upgrades.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Verify that the target material matches the calibration profile of the 3300 XL system (standard calibration is AISI 4140 steel).
• Ensure side clearance around the probe tip of at least three probe tip diameters to prevent cross-talk and side-sensing interference.
• Do not exceed recommended torque values when tightening the probe case into the threaded machine mount.
• Protect the miniature coaxial connection using connector protectors or self-fusing tape if exposed to lubricating oil or moisture.

Compliance and Certifications

• CN regional compliance certifications for hazardous area deployment.
• Compatible with standard international vibration monitoring standards.