148239-00-18-10-02 Bently Nevada 3300 XL 11mm Underwater Proximity Probe

Technical Overview: 3300 XL 11mm High-Pressure Submersible Transducer System

The 148239-00-18-10-02 is a high-reliability 11mm eddy current proximity probe manufactured by Bently Nevada under the premier 3300 XL series architecture. Engineered specifically for demanding wet or fully submerged turbomachinery monitoring environments, this transducer converts mechanical shaft position or dynamic vibration into linear electrical signals.

Constructed with a 304 stainless steel threaded body (5/8-18 UNF) and integral fluid-sealed Tefzel protective tubing over the probe leads, the 148239-00-18-10-02 prevents oil, process liquid, or moisture ingress from damaging internal wiring inside gearboxes or bearing housings. The probe tip and body seal are factory-tested to withstand up to 34 Bar (500 psi) static nitrogen pressure.

Featuring a Gold-plated ClickLoc miniature coaxial connector, this 1.0-meter system probe interfaces with standard 3300 XL 11mm extension cables and proximitor sensors to deliver linear displacement data across extended thermal limits ranging from -51°C to +177°C.

Ordering Code & Configuration Breakdown: 148239-00-18-10-02

Base Part Number Structure: 148239-AA-BB-CC-DD

• 148239: Base Model - 3300 XL 11mm Underwater Proximity Probe (5/8-18 UNF Thread, Tefzel Tubing Sealed Case)
• AA (Unthreaded Length Option):
  • 00: 0.0 inches (Fully threaded probe body configuration)
  • Range Reference: 00 (0.0 in) to 110 (11.0 in) in 0.1 in increments
• BB (Overall Case Length Option):
  • 18: 1.8 inches overall casing length
  • Range Reference: 18 (1.8 in) to 120 (12.0 in) in 0.1 in increments
• CC (Total System Length Option):
  • 10: 1.0 Meter (3.3 feet) overall probe cable length
  • Matches 5m or 9m total system length when combined with appropriate extension cable
• DD (Connector and Cable Type Option):
  • 02: Miniature coaxial ClickLoc connector, standard cable type

Technical Parameter Matrix

Mechanical & Dimensional Specifications

• Brand / Manufacturer: Bently Nevada
• Model / Part Number: 148239-00-18-10-02
• Product Series: 3300 XL 11mm Proximity Transducer System
• Mounting Thread Pitch: 5/8-18 UNF outer casing thread
• Case Material: 304 Stainless Steel with integrated Tefzel armor tubing
• Connector Architecture: Miniature coaxial ClickLoc male connector
• Probe Tip Diameter: 11mm (0.43 inches) eddy current sensing face

Environmental & Operating Thresholds

• Operating & Storage Temperature: -51°C to +177°C (-60°F to +351°F)
• Submersible Case Pressure Seal: Rated to 34 Bar (500 psi) static Nitrogen pressure
• Chemical Compatibility: Compatible with mineral oils and synthetic lubricants (Note: 304 Stainless Steel construction is NOT suitable for raw salt-water or seawater immersion)
• Hazardous Area Certifications:
  • Class I, Zone 0: AEx/Ex ia IIC T5...T1 Ga (Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III) via zener barriers or galvanic isolators
  • Class I, Zone 2: AEx/Ex nA IIC T5...T1 Gc; AEx/Ex ec IIC T5...T1 Gc (Class I, Division 2, Groups A, B, C, D)

Target Applications & Compatible Machinery

• Submerged Hydro-Turbine Thrust Bearings: Monitoring axial shaft displacement inside oil-filled runner housings where probe heads are continually covered in lubricating fluid.
• High-Pressure Centrifugal Compressors: Tracking radial vibration and rotor positioning inside pressurized seal cavities operating up to 34 Bar.
• Heavy Industrial Gearboxes: Installed internally where intense oil splash and fluid mist require armored Tefzel cable sleeving to prevent jacket degradation.
• Large Steam Turbine Retrofits: Direct drop-in replacement for legacy 7200 series 11mm probes requiring broader linear range (4.0 mm / 160 mil) than standard 8mm probes.

Diagnostic Capabilities & Field Inspection

• Connector Submersion Warning: While the probe tip and Tefzel tubing are fluid-tight, the ClickLoc connector tail end is NOT liquid-sealed and must terminate inside a dry junction enclosure above the fluid line.
• Static Resistance Check: Use a digital multimeter to measure resistance between the center pin and outer conductor of the ClickLoc connector. A healthy 1.0m 11mm probe typically reads between 4.0 Ω and 7.5 Ω.
• Case Isolation Inspection: Measure resistance from either connector pin to the 304 SS outer case; resistance must exceed 500 MΩ. Any short circuit indicates internal insulation breakdown due to severe thermal stress or fluid penetration.
• Tefzel Sleeve Integrity: Regularly inspect the outer Tefzel tubing for severe mechanical crimps or abrasions that could compromise fluid barrier protection during high-vibration operation.

Global PLC Spare HUB's Insight

During a scheduled overhaul on a high-pressure boiler feed pump, plant maintenance engineers encountered repeated false "Probe Fault" alarms on a dynamic radial channel utilizing a 148239-00-18-10-02 transducer. Upon site inspection, our technical specialists noted that field mechanics had routed the ClickLoc coaxial connection inside the oil sump cavity without secondary sealing, allowing synthetic oil to pool inside the connector shell. While the 304 SS probe tip and Tefzel armored body held their 34 Bar pressure rating perfectly, the oil contamination altered connector contact capacitance, corrupting the high-frequency RF signal from the proximitor. After cleaning the ClickLoc assembly with electrical solvent, applying heat-shrink silicone connector boots, and mounting the junction box external to the oil reservoir, the system gap voltage restored instantly to 9.8 VDC with pristine vibration waveforms.

Logistics, Shipping, and Warranty Terms

• Express Global Logistics: Rapid international dispatch via top-tier carriers including FedEx, DHL, and UPS.
• Warehouse Processing Time: In-stock inventory dispatches within 24 to 48 hours following payment confirmation.
• Protective Packaging: Shipped in custom anti-static bags, wrapped in high-density protective foam, and secured in industrial-grade outer cartons to preserve thread precision.
• Warranty Assurance: Includes a comprehensive 12-month full replacement warranty against manufacturing defects.

Engineering Selection & Installation Guidance

When selecting the 148239-00-18-10-02, ensure the 5/8-18 UNF thread matches your existing mounting bracket or machine casing tap. Verify that the 1.8-inch case length (BB=18) and 0.0-inch unthreaded length (AA=00) allow proper thread engagement to achieve optimal mechanical gap positioning.

Confirm that overall system cable matching rules are strictly followed: pair this 1.0m probe only with a 3300 XL 11mm 4.0m extension cable when operating a 5-meter total system proximitor sensor, or an 8.0m cable for a 9-meter system setup.

For applications involving exposure to brackish water, marine mist, or corrosive marine environments, do not utilize 304 SS probes; consult our engineering team for custom 316 SS or titanium alloy hardware options.

Field Engineering Frequently Asked Questions (FAQ)

Question: What is the primary difference between a standard 3300 XL 11mm probe and the submersible 148239 model?

Answer: The 148239 probe features high-pressure internal case sealing rated to 34 Bar (500 psi) and protective Tefzel tubing molded directly over the cable jacket to withstand total fluid immersion inside machinery sumps.

Question: Can the ClickLoc connector on the end of the 148239 probe cable be submerged directly in lubricating oil?

Answer: No, the ClickLoc connector assembly is not fluid-tight; only the probe body and Tefzel-sleeved cable section can be submerged, while the connector must terminate in a dry junction box.

Question: Why is an 11mm eddy current probe chosen over a standard 8mm probe for axial thrust measurement?

Answer: An 11mm probe delivers a wider linear measurement range of 4.0 mm (160 mils) compared to the 2.0 mm (80 mils) range of an 8mm probe, providing essential margin for machinery with larger axial shaft float.

Question: How can I verify if the pressure seal on a installed transducer has failed?

Answer: Disconnect the extension cable and inspect the ClickLoc connector housing; presence of oil inside the connector barrel or fluid dripping from inside the Tefzel sleeve indicates seal degradation.

Question: Are special safety barriers required when operating this sensor in classified hazardous gas locations?

Answer: Yes, for Class I, Zone 0 / Division 1 Intrinsic Safety compliance, the transducer loop must be installed with certified zener barriers or galvanic isolators according to Bently Nevada control drawing 141092.

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