Product Overview
When machine reliability is critical, the Bently Nevada 330191-00-40-50-CN 3300 XL 8 mm ETR proximity probe delivers consistent measurements in harsh industrial environments. This probe is designed as a direct replacement for older 3300 series models, incorporating patented TipLoc molding and CableLoc technology for enhanced durability. The 330191-00-40-50-CN features a 3/8-24 UNF thread without armor and a total length of 5.0 meters (16.4 feet), making it suitable for tight installations. Its robust construction ensures long-term performance in rotating machinery monitoring.
Technical Specifications
The Bently Nevada 330191-00-40-50-CN is engineered for precision. Key parameters include:
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Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum; -23 Vdc to -26 Vdc with barriers.
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Output Sensitivity: Less than 2 mV change per volt change in input voltage.
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Output Resistance: 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, 5.0 m total length.
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Tensile Strength: 330 N (75 lbf) probe case to probe lead; 270 N (60 lbf) at connectors.
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Connector Material: Gold-plated brass or beryllium copper; maximum torque 0.565 N·m (5 in·lbf).
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Thread: 3/8-24 UNF, maximum engagement 0.563 in.
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Weight: 323 g/m (11.4 oz).
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Temperature Range: -55°C to +232°C (T1), with classifications for EPL Ga, Gc, and Dc.
These specifications ensure reliable operation in high-vibration and high-temperature environments.
Industry Applications
The Bently Nevada 330191-00-40-50-CN is ideal for monitoring shaft vibration and position in turbines, compressors, pumps, and fans. Its 8 mm probe tip provides thicker encapsulation for greater robustness, making it suitable for applications where physical abuse is a concern. The 5-meter cable length is optimized for use with the 5-meter Proximitor sensor, ensuring accurate readings. In petrochemical and power generation plants, this probe helps detect early signs of bearing wear or imbalance, reducing unplanned downtime.
Installation & Setup
Installing the 330191-00-40-50-CN requires careful attention to thread engagement and torque. Use the 3/8-24 UNF thread with a maximum engagement of 0.563 inches to avoid damaging the probe. Tighten the connector to 0.565 N·m (5 in·lbf) using a calibrated torque wrench. Ensure the probe cable is routed without sharp bends and secured to prevent strain. For differential pressure sealing, the Viton® O-ring must be properly seated. One-meter systems do not require an extension cable, but for 5-meter probes, use only the corresponding 5-meter Proximitor sensor.
Maintenance & Reliability
Regular inspection of the probe tip and cable is recommended. The patented CableLoc design provides 330 N pull strength, but avoid exceeding this load. Check the gold-plated connectors for oxidation every six months. The probe's PPS tip resists chemical degradation, but in aggressive environments, consider the optional FluidLoc cable to prevent oil leakage. The 330191-00-40-50-CN is not pressure tested prior to shipment, so verify sealing after installation. To maximize service life, operate within the specified temperature envelope (-55°C to +232°C for T1 classification).
Selection Guide & Purchasing Advice
When ordering, confirm that the 330191-00-40-50-CN matches your system requirements: 5.0 m total length, without armor, and CN country-specific approval. Ensure compatibility with Bently Nevada Proximitor sensors and extension cables. For replacements, verify the thread size and overall length against the existing probe. PLC Source PRO offers this genuine Bently Nevada part with factory warranty and original packing. For volume pricing or expedited shipping, contact PLC Source PRO directly.