Product Introduction
When precise shaft vibration monitoring is critical for rotating machinery, the Bently Nevada 330709-000-040-50-11-05 3300 XL 11 mm Proximity Probe delivers reliable eddy current sensing. This probe is designed for high-performance measurement in turbines, compressors, and pumps, offering robust construction and proven accuracy. Part of the 3300 XL series, the 330709-000-040-50-11-05 features M16 x 1.5 thread without armor, a 5.0 meter total length, and a miniature coaxial ClickLoc connector with FluidLoc cable.
Technical Specifications
The Bently Nevada 330709-000-040-50-11-05 includes critical parameters for reliable operation:
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Probe DC Resistance: 7.2 ± 0.8 ohms at 5.0 m length
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Temperature Range: -52°C to +177°C (operating and storage)
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 304 stainless steel
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Cable Specification: 75 Ω triaxial, FEP insulated, total lengths: 1, 5, or 9 meters
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Probe Case Torque: Recommended 21.1 N•m (187 in•lb), maximum 63.3 N•m (560 in•lb)
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Minimum Bend Radius: 25.4 mm (1.0 in)
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Cross-talk Limitation: Recommended minimum target diameter 30.5 mm, shaft diameter 152 mm
These specifications ensure the 330709-000-040-50-11-05 maintains accuracy in demanding industrial environments.
Application Examples
The 330709-000-040-50-11-05 is suitable for radial vibration and axial position monitoring in:
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Steam and gas turbines: Provides accurate shaft displacement data for protection and control.
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Centrifugal compressors: Ensures reliable operation under high speed and temperature variations.
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Industrial pumps: Detects shaft misalignment and bearing wear early to prevent unplanned downtime.
Its wide temperature range and robust cabling make it a preferred choice for harsh conditions.
Installation & Setup Guidance
Proper installation of the 330709-000-040-50-11-05 is essential for accurate readings. Follow these guidelines:
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Probe Case Torque: Tighten the M16x1.5 case to 21.1 N•m (187 in•lb). Do not exceed 63.3 N•m to avoid thread damage.
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Connector Torque: Finger tight only; maximum torque 0.565 N•m (5 in•lb) to protect the connector.
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Bend Radius: Maintain a minimum bend radius of 25.4 mm for the cable, even when armored.
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Thread Engagement: Maximum 24 mm of thread engagement.
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Cross-talk: Ensure target and shaft diameters meet recommended minima to avoid interference.
Use only with the five meter Proximitor Sensor to match cable length.
Selection Guide & Purchasing Advice
When selecting the 330709-000-040-50-11-05, verify the following:
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Probe Length: This model is a 5.0 meter probe, designed exclusively for use with the five meter Proximitor Sensor.
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Connector Type: Miniature coaxial ClickLoc with connector protector and FluidLoc cable.
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Agency Approvals: Multiple approvals included (Option 05).
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Compatibility: Ensure your system supports eddy current probe inputs.
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