Product Overview

The Bently Nevada 146054-008-10-02-CN is a 3300 XL 8 mm proximity probe assembly featuring a specialized ceramic cap. This hardware component operates as part of a proximity transducer system, interfacing directly with a 3300 XL extension cable and Proximitor sensor for continuous machinery protection. The sensor operates via the eddy current principle to measure static and dynamic distances between the probe tip and a conductive target material.

The ceramic-capped design makes this probe suitable for liquid-phase machinery environments, such as inside steam turbines, high-pressure industrial compressors, process pumps, and gas turbines where liquid erosion, aggressive synthetic oils, or chemical contaminants degrade standard plastic probe tips. The integrated ClickLoc miniature coaxial connector secures the high-frequency RF link to the extension cable, preventing fluid ingress and connection loosening from mechanical vibration.

Ordering Information

The alphanumeric suffixes of the part number 146054-008-10-02-CN specify the exact physical dimensions, connector variants, and regional electrical safety certifications required for procurement:

• Base Part Number: 146054 (3300 XL 8 mm Ceramic Capped Probe)

• Unthreaded Length Option (-008): 0.8 inches

• Total Length Option (-10): 1.0 meter (3.3 feet)

• Connector and Cable-Type Option (-02): Miniature coaxial ClickLoc connector, standard cable

• Agency Approval Option (-CN): China country-specific intrinsic safety / explosion-proof hazardous area approvals

Technical Specifications

Probe Material and Structural Composition

• Probe Tip Material: High-purity Alumina Ceramic cap assembly

• Probe Case Material: AISI 303 stainless steel (1/4-28 or M8 thread interface equivalents)

• Cable Construction: 75 ohm miniature coaxial cable with fluoropolymer outer insulation sleeve

• Connector Pull Strength: 220 N (50 lb) maximum rated physical tension limit

Engineering & Installation Guide

• Linear Range Verification: The 146054-008-10-02-CN probe has a standard 8 mm system linear range of 2.0 mm (80 mils). Always perform a mechanical calibration verification using a micrometer spindle before final torque locking inside the housing.

• Target Material Calibration: The factory default calibration matches AISI 4140 steel targets. If measuring alternative shaft alloys, such as stainless steel or Inconel, the calibration curve changes and may require Proximitor model modifications or software cross-calibration adjustments.

• Cable Routing and Bending Radius: Maintain a minimum bend radius of 25.4 mm (1.0 in) for the coaxial cable lead. Sharp bends or tight routing paths may alter cable impedance and introduce signal noise into vibration outputs.

• Connector Insulation: Use silicon self-fusing tape or standard Bently Nevada connector isolation sleeves over the ClickLoc junction. Uninsulated connectors contacting junction box walls may create ground loops and signal drift.

• Thread Torque Specifications: Do not exceed 4.5 N-m (40 in-lb) of torque during installation. Excessive torque may damage the ceramic-to-metal bond structure.

Technical FAQ

• What is the structural advantage of the ceramic cap over standard 3300 XL probes?
  Standard probes use PPS tips, which may erode under high-velocity fluid exposure or aggressive lubricants. The ceramic tip provides improved erosion resistance and chemical stability.

• Can I connect this 1.0-meter probe to a 9-meter extension cable?
  Yes. The combined probe and extension cable length must match the total system length requirement specified by the corresponding Proximitor sensor.

• How do I troubleshoot a sudden "Not OK" fault indication?
  Use a digital multimeter to measure the center conductor-to-shield resistance. An infinite reading may indicate an internal cable failure.

• What does the -CN suffix indicate?
  The -CN suffix identifies China hazardous area certification compliance. The electrical and mechanical specifications remain identical to standard versions.