330876-01-90-00-05 Bently Nevada 3300 XL 50mm Proximity Probe Sensor

Bently Nevada 330876-01-90-00-05 Probe & Global PLC Spare HUB's Insight

Turbine engineers rely on the 330876-01-90-00-05 50 mm proximity probe to withstand extreme thermal environments near steam turbine drive ends. Global PLC Spare HUB field specialists frequently specify this robust sensor for high-heat generator setups. For instance, a power plant overhaul team utilized the 330876 series unit inside a 180 degrees C turbine casing, maintaining precise axial clearance tracking without thermal drift. Our technical personnel inspect every factory-sealed unit for optimal DC resistance before global dispatch.

Configuration Breakdown & Suffix Architecture

• Base Model: 330876 - 3300 XL 50 mm Proximity Probe
• Probe Case Type Option: -01 = One-half to 20 English Thread with Straight Exit
• Total Length Option: -90 = 9.0 meters (29.5 feet) total cable length
• Armor Option: -00 = High Temperature FluidLoc Cable design
• Agency Approval Option: -05 = Multiple hazardous area approvals included

Technical Specifications Table

Installation Guide & Mechanical Setup

• Thread the 330876-01-90-00-05 probe housing directly into the 1/2-20 mounting port using the locknut with predrilled safety wire holes.
• Use the included disposable installation tool and connector protectors to keep ClickLoc connectors free from job-site contamination.
• Remove the collar on the probe lead ClickLoc connector when threading cables through tight machinery clearances.
• Ensure the front and rear seals remain intact to block moisture entry into the polyphenylene sulfide probe tip.

Diagnostic Capabilities & Equipment Suitability

• Continuously measures dynamic and static shaft positions in harsh steam turbine drive-end (DE) environments.
• Withstands severe thermal spikes up to 250 degrees C during operational transients.
• Engineered specifically for heavy-duty steam turbines, large industrial generators, and high-temperature gas expanders.

Logistics, Warranty & Shipping Terms

• Protected by a standard 12-month operational warranty covering manufacturing defects.
• Dispatched within 24 to 48 hours worldwide via dependable carriers including DHL, FedEx, and UPS.
• Shipped in secure factory packaging with all connector protectors included.

Model Selection & Technical Comparison

When selecting between high-temperature 50 mm probe variants, engineers must evaluate cable length, thread configurations, and agency approvals to match specific turbine housing layouts. For an alternative configuration with distinct suffix parameters, review the 330876-03-50-00-00 model specification page to determine optimal fit for your machinery architecture.

Expert FAQ & Selection Guide

Q: How do front and rear seals protect the 50 mm probe in high-humidity steam environments?

A: The dual seal configuration combined with the High Temperature FluidLoc cable prevents moisture migration into the internal probe tip.

Q: What is the maximum allowable short-term temperature exposure for this model?

A: The probe safely withstands short-term operating temperatures up to +250 degrees C (+482 degrees F) for less than 24 hours.

Q: Why does the ClickLoc connector feature a removable collar design?

A: The removable collar allows maintenance technicians to route the rigid triaxial cable easily through tight mechanical clearance paths.

Q: What is the DC resistance specification for the 9.0-meter cable variant?

A: The DC resistance measured from center to coaxial conductor is exactly 8.9 plus or minus 1.1 ohms.

Q: How do engineers select between straight exit and side exit 50 mm probe bodies?

A: Choose straight exit models like option -01 for axial mounting ports with linear clearance, and select side exit variants when spatial constraints restrict rear cable routing.

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