330876-02-10-01-05 Bently Nevada 3300 XL 50mm Probe Differential Expansion

Product Overview

The Bently Nevada 330876-02-10-01-05 belongs to the high-performance 3300 XL 50 mm Proximity Transducer System. Engineers specifically deploy this eddy current probe to monitor non-contact shaft position and vibration on critical industrial machinery. It excels in heavy-duty turbomachinery applications that demand extended linear range and high thermal tolerance.

The rugged sensor features a Polyphenylene Sulfide (PPS) tip and AISI 304 stainless steel case. Integrated front and rear seals prevent fluid intrusion into the internal assembly. A standard High Temperature FluidLoc cable protects the internal conductors against moisture penetration along the cable length.

Technical Specifications

Application Scenarios & Diagnostic Capabilities

• Steam Turbine Differential Expansion: Tracks relative growth between large steam turbine rotors and outer casings during thermal warm-up cycles.
• Large Hydroelectric Generator Monitoring: Measures high-amplitude axial thrust position shift on heavy vertical hydro units.
• Large Shaft Dynamic Displacement: Delivers precise distance telemetry across broad clearance zones where standard 8 mm probes lack range.
• Early Failure Prevention: Detects severe rotor position creep before mechanical contact ruins internal steam seals.
• Condition-Based Maintenance Diagnostics: Provides continuous baseline voltage telemetry to machinery protection systems like the Bently Nevada 3500 System.

Installation, Calibration & Maintenance

• Mount probe securely into rigid bracket using the provided M14x1.5 metric locknut.
• Tighten predrilled safety wire locknut to prevent thread looseness from machine vibration.
• Maintain 21 mm maximum thread engagement limit during mechanical alignment.
• Route armored cable through tight conduit passageways using the removable ClickLoc collar.
• Verify DC resistance across conductor pins before powering the matching 3300 XL Proximitor Sensor.
• Clean connector ends thoroughly with approved solvent prior to mating protective caps.

System Compatibility & Hardware Matching

• Fully compatible with all standard Bently Nevada 3300 XL 50 mm Proximitor Sensors.
• Connects seamlessly to matched 50 mm series extension cables of equivalent electrical length.
• Integrates natively into Bently Nevada 3500/45 Hydro Monitor and 3500/42M Vibration Monitor racks.

Packaging Details & Warranty Terms

• Condition: 100% New & Original factory sealed unit.
• Included Accessories: Factory connector protectors and disposable connector installation tool.
• Factory Warranty: Full 12 Months factory warranty coverage.
• Dispatch Lead Time: Fast 24 to 48 hour processing window.
• Logistics Partners: Express global delivery via FedEx, UPS, and DHL.

Global PLC Spare HUB's Insight

In power generation plant overhauls, the extended 50 mm measurement range of the 3300 XL 50 mm Series proves crucial for differential expansion monitoring on steam turbine casings. During thermal startup sequences, high-pressure steam casings expand rapidly, exposing lower-grade sensors to extreme moisture and heat. The Bently Nevada 330876-02-10-01-05 utilizes dual front and rear seals alongside a High Temperature FluidLoc cable structure. This design prevents damp steam condensate from creeping into the probe tip junction box—a common cause of signal drift in high-temperature environments. Field engineers benefit significantly from the removable ClickLoc collar, which simplifies routing heavy armored cable through narrow, congested turbine foundation channels.

Ordering Guide

• Confirm machine casing mounting thread size: select -02 for M14x1.5 metric thread.
• Verify total cable system length needs: option -10 provides a 1.0 metre unmounted probe lead.
• Specify environmental shielding requirements: option -01 supplies high-temperature FluidLoc armored cable protection.
• Determine hazardous area certification requirements: option -05 fulfills global ATEX, IECEx, and CSA safety mandates.

Frequently Asked Questions

What target gap range does the 3300 XL 50 mm probe provide?

The probe delivers an extended 50 mm (2.0 inches) linear measurement span, making it ideal for monitoring large rotor-to-casing differential expansion.

Can this probe withstand steam turbine environment temperatures?

Yes, it operates continuously between -35°C and +200°C (-31°F to +392°F) and handles short spikes up to +250°C (+482°F).

How does the FluidLoc cable construction protect system signals?

FluidLoc cable construction blocks moisture, oil, and process fluids from traveling through the interior cable conductors into sensitive termination points.

Why does the ClickLoc connector include a removable collar?

The removable collar reduces the connector footprint, allowing engineers to pull the lead through narrow conduits without damaging internal pins.

What is the benefit of the -05 Agency Approval option code?

Option -05 grants multiple international hazardous area certifications, including CSA, ATEX, and IECEx approvals for classified plant environments.

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