330851-02-000-080-50-00-00 5m FluidLoc Triaxial Probe Bently Nevada

Product Overview

The 330851-02-000-080-50-00-00 is an industrial-strength 3300 XL 50mm Proximity Transducer Probe engineered by Bently Nevada. Featuring an M30×2 metric thread and an 80mm extended stainless steel housing, this high-performance eddy current sensor is purpose-built for critical machinery monitoring. It provides non-contacting, static, and dynamic measurements of radial vibration, axial displacement, and shaft casing telemetry inside high-stress environments like centrifugal compressors, gas turbines, and heavy power plant generator sets.

Core Features

• High-Dielectric PEEK Tip: The probe tip is molded from rugged PEEK polymer, delivering 500V of dielectric strength to completely block electrical cross-talk and path grounding.
• FluidLoc Triaxial Cable: Integrated 5.0-meter 75Ω triaxial cable utilizes patented FluidLoc sealing to prevent oil, process moisture, and corrosive fluids from wicking through the cable core.
• AISI 304 Stainless Armor: Encased in an unyielding 80mm AISI 304 stainless steel housing with an IP67 sealing rating to handle severe thermal and chemical exposure.
• Extended Thermal Duty: Operates continuously across a broad temperature scale from −35°C up to +200°C without calibrated range drifting.

Technical Specifications

Engineering & Installation Guide

• Mounting Support & Weight Limits: Weighing exactly 0.33 kg with its integrated 5-meter lead, ensure the probe housing is threaded straight into its bracketry without cross-threading. Secure the M30 case using a recommended torque of 68 N·m, taking care never to exceed the absolute mechanical yield point of 163 N·m.
• Mechanical Clearance Gaps: Maintain clear radial paths around the PEEK tip. Because it is a 50mm high-diameter system, nearby structural metal components must sit outside the probe’s active eddy-current field bubble to avoid generating artificial distance calibrations or offset distortions.
• Cable Bend Management: Route the 75Ω FluidLoc triaxial cable through dedicated protective conduit routing channels. Avoid sharp crimps or tight bending steps under a 30mm radius to protect the inner PFA insulation and shield profiles from structural tearing.
• Connector Protection: Keep the coaxial connectors clean and completely dry during installation. Wrap external connections with self-vulcanizing silicone tape or use specialized connector boots to prevent oil, grease, or washdown fluids from seeping into the terminal junctions.

Technical FAQs

Q1: What specific advantage does the 75Ω FluidLoc triaxial cable architecture provide over standard coaxial lines?
A1: The FluidLoc cable configuration is engineered with internal barriers that stop oil or moisture from wicking along the inside of the cable jacket if it gets cut or damaged in the field. Its triaxial shielding layer also blocks high-frequency electromagnetic noise from nearby high-voltage machinery motors.

Q2: Why is the exact 7.5Ω ±0.8Ω resistance measurement critical when checking the probe?
A2: This resistance range confirms the internal coil's continuity and matching properties. Testing the resistance at 25°C before installation helps you spot short circuits or internal lead damage, ensuring the probe pairs perfectly with its 3300 XL Proximitor sensor loop.

Q3: Can this probe handle severe machinery vibration zones without signal drift?
A3: Yes. With a rugged operational tolerance of 15g RMS, the probe is purpose-built to withstand the severe vibrations of heavy, high-speed machines like steam turbines or gearboxes without mechanical fatigue or loss of calibration precision.