Product Overview
The Bently Nevada 330191-00-33-05-05 is a 3300 XL 8 mm ETR proximity probe designed for reliable vibration and position measurement in rotating machinery. This industrial automation module leverages patented TipLoc and CableLoc molding methods to deliver superior mechanical strength and signal integrity. With a 0.5-meter total length and multiple agency approvals, it is ideal for upgrading older probe installations in turbines, compressors, and pumps.
Technical Specifications
Key parameters of the 330191-00-33-05-05 include:
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Power Supply: Requires -17.5 Vdc to -26 Vdc (with barriers: -23 Vdc to -26 Vdc) at 12 mA max consumption.
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Output Resistance: 50 Ω
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Supply Sensitivity: Less than 2 mV change per volt change in input voltage.
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Probe DC Resistance (at 0.5 m): 7.45 Ω ± 0.50 Ω
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Probe Tip Material: Polyphenylene sulfide (PPS)
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Probe Case Material: AISI 303 or 304 stainless steel
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Cable: 75 Ω triaxial, FEP insulated (0.5 m length)
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Tensile Strength: 330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connectors.
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Connector Torque: Max 0.565 N·m (5 in·lbf)
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Temperature Range (Probe Only): -55°C to +232°C (T1 classification)
Industry Applications
The Bently Nevada 330191-00-33-05-05 excels in critical machinery protection and condition monitoring. Common applications include:
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Steam and Gas Turbines: Provides precise shaft vibration and thrust position measurements, helping prevent catastrophic failures.
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Centrifugal Compressors: Monitors rotor dynamics to ensure safe operation under variable loads.
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Hydro Power Plants: Used in generator bearing monitoring for early detection of misalignment or imbalance.
Installation Guidance
When installing the 330191-00-33-05-05, ensure the probe case thread (3/8-24 UNF) is engaged to a maximum thread engagement length of 0.563 in. The unthreaded length is 0.0 in., so the probe tip will be flush with the mounting surface if required. For systems without an extension cable (one-meter systems), use the provided 0.5 m cable directly. Connect to Bently Nevada extension cables and proximity system only. Tighten connectors to 0.565 N·m maximum torque to avoid damage.
Maintenance and Reliability
The 3300 XL probe design incorporates a Viton® O-ring to seal differential pressure between the probe tip and case, reducing contamination ingress. The probe case provides 330 N pull strength, ensuring long-term reliability even in high-vibration environments. For optimal performance, regularly inspect the cable for wear and verify connector torque during scheduled outages. The probe is not pressure tested prior to shipment, so users should apply appropriate system pressure tests after installation.
Selection Guide
Before purchasing the Bently Nevada 330191-00-33-05-05, verify that your system requires a 8 mm ETR probe with 3/8-24 UNF threads and a 0.5 m total length. This model does not include armor; if oil leakage prevention is needed, consider the FluidLoc cable option (ordered separately). For quality assurance and factory-warranted parts, PLC Source PRO supplies this module new in original packaging with a 12-month warranty.