Product Introduction
When probe tip detachment or cable pull-out compromises machine monitoring, the Bently Nevada 330191-00-33-05-CN 3300 XL 8 mm ETR proximity probe offers proven solutions. This probe incorporates patented TipLoc molding for a robust bond between tip and body, and CableLoc design providing 330 N (75 lbf) pull strength. The thicker encapsulation of the probe coil in molded PPS plastic enhances durability against physical abuse. Recommended for optimal robustness, this probe is designed for differential pressure sealing with a Viton O-ring.
Technical Specifications Breakdown
Key specifications of the Bently Nevada 330191-00-33-05-CN ensure reliable performance in demanding environments.
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Power Requirements: -17.5 Vdc to -26 Vdc (nonincendive circuit), -23 Vdc to -26 Vdc with barriers; maximum 12 mA consumption. Operation above -23.5 Vdc may reduce linear range.
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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 (0.5 m length): 7.45 ± 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: 75Ω triaxial, FEP or PFA insulated; available in lengths 0.5, 1, 1.5, 2, 3, 5, or 9 meters. Optional flexible AISI 302/304 SST armor with FEP jacket.
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Connector: Gold-plated brass or beryllium copper; maximum torque 0.565 N·m (5 in·lbf).
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Temperature Classification (Probe Only): For EPL Ga/Gc: T1 (-55°C to +232°C) through T5 (-55°C to +40°C); for EPL Dc: surface temperature limits per classification.
Maintenance & Reliability
The 330191-00-33-05-CN probe’s design reduces common failure modes. The TipLoc and CableLoc features prevent tip separation and cable pull-out, while the FluidLoc option (available upon order) prevents oil leakage through the cable interior. Regular inspection of the Viton O-ring and cable connectors is recommended. Avoid exceeding maximum connector torque of 0.565 N·m. The probe is not pressure tested before shipment; verify sealing in high-pressure applications.
Troubleshooting & Common Issues
Common issues with proximity probes include signal drift due to cable damage or connector corrosion. The Bently Nevada 330191-00-33-05-CN uses gold-plated connectors to minimize corrosion. If reduced linear range is observed, verify supply voltage is within -23.5 Vdc to -26 Vdc. For oil leakage, order the FluidLoc cable option. Ensure probe entity parameters are met when using BN extension cables and BN Prox.
Selection Guide & Purchasing Advice
When ordering, verify the unthreaded length (0.0 in), overall case length (33 = 3.3 in), total length (0.5 = 0.5 metre), and agency approval (CN = Country Specific Approval). This probe uses 3/8-24 UNF thread. For one-meter systems, no extension cable is needed. PLC Source PRO offers new, original factory-packed units with a 12-month warranty. Ensure compatibility with your Bently Nevada monitoring system before purchase.