Configured for non-contacting displacement measurement in 3300 XL 25 mm Proximity Transducer systems, the Bently Nevada 330851-02-020-060-50-00-00 (330851 Proximity Probes) provides direct physical/electrical execution. The instrument captures differential distance metrics between the 25 mm sensor tip face and a conductive target area, translating structural deviations into modulated high-frequency eddy-current impedance shifts prior to external signal processing.

Model Parameter Matrix

• 330851: Base model numeric code for the 3300 XL 25 mm proximity probe hardware.

• 02: Threaded case type option selecting an M30 x 2 metric thread profile.

• 020: Unthreaded case length configuration assigning 20 mm (approx. 0.8 in) of smooth barrel length.

• 060: Overall case length choice defining 60 mm of total case housing footprint.

• 50: System total length parameter dictating a 5.0 meters (16.4 feet) length standard.

• 00: Armor selection variant selecting a standard fluid-resistant cable layer without flexible metal armor.

• 00: Agency certification configuration specifying standard delivery with no approvals required.

Hardware Specifications

Mechanical Monitoring & TSI Rotor Dynamics

The 25 mm sensor tip area governs specific eddy-current probe scaling coefficients designed to measure high-amplitude displacement parameters during dynamic machinery cycles. Accurate evaluation of rotor dynamics is maintained through gap voltage validation tests, setting the resting physical position relative to -10 VDC targets. Advanced structural shielding and component geometry yield native cross-talk suppression properties that prevent adjacent RF signal interference paths when multiple large-diameter elements operate inside shared oil-deflector frames.

Ordering Info

• 1* 330851-02-020-060-50-00-00 Proximity Probe Unit

• 1* Coaxial Terminal ClickLoc Protective Shell

Field Installation Guidelines

Mechanical Torquing and Depth Configuration

• Mount the M30 x 2 threaded housing into the bracket interface, keeping a thread depth allocation of no less than 5 full engaged threads inside the fixture.

• Rotate the sensor case body to establish the required mechanical gap, ensuring the terminal multimeter tracks the live voltage to the standard midpoint.

Electrical Routing and Shield Interconnects

• Place the 5.0 meters non-armored cable path inside clean galvanized rigid conduits to isolate the jacket polymer from surrounding thermal sources.

• Terminate the outer coaxial shield layout at the central Proximitor ground rail terminal, preventing parallel structural earth loops along the machinery body.

Frequently Asked Questions

• Is the cable line permitted to be hot-swapped while the main rack monitor loop is powered up?

  Yes, the hardware structure permits active hot-swap insertion without corrupting adjacent vibration measurement channels across the instrument bus.

• How is the on-site gap voltage validation process performed during standard installation setup?

  The loop is verified by connecting a digital voltmeter to the Proximitor signal out contacts, reading a target baseline value of -10 VDC.

• Does a shift in target metallurgy alter the factory default eddy-current probe scaling?

  Yes, the scale slope relies on AISI 4140 steel, and utilizing alternative alloys will require separate laboratory re-calibration procedures.

• What happens to the proximity module signal if the total loop length option is misconfigured?

  Using incorrect electrical line lengths induces internal resonance changes, creating amplitude calibration errors and signal distortion.

• How does the probe tip geometry provide integrated cross-talk suppression inside the bearing house?

  The internal coil wraps are shielded to concentrate the magnetic field forwards, limiting radial emission escape zones between sensor tips.

• Does this non-armored variant include moisture protection features along the main wire jacket?

  Yes, the standard jacket material features high chemical resistance designed to isolate internal conductors against standard turbine oil mist.

• What is the maximum safe operating temperature exposure for the 25 mm probe tip block?

  The front element tip assembly is rated to operate securely across a standard structural thermal range up to +177 deg C.

• Is an external power source directly wired to this sensor element?

  No, this passive probe receives high-frequency drive current solely through the coaxial terminal of its paired 3300 XL Proximitor.