Product Overview: Bently Nevada 330191-00-16-20-CN Proximity Probe
The Bently Nevada 330191-00-16-20-CN is a 3300 XL 8 mm ETR proximity probe designed for critical rotating machinery. This model features a 3/8-24 UNF thread, minimum unthreaded length of 0.0 inches, an overall case length of 1.6 inches, and a total length of 2.0 meters (6.6 feet). It comes with Country Specific Approval (CN option). The probe incorporates patented TipLoc and CableLoc technologies for enhanced mechanical robustness, providing 330 N (75 lbf) pull strength. This ensures reliable performance in harsh industrial environments, reducing unexpected failures and maintenance costs.
Technical Specifications and Performance Metrics
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Power Supply: Requires -17.5 Vdc to -26 Vdc (nonincendive circuit), -23 Vdc to -26 Vdc with barriers at 12 mA max.
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Supply 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 DC Resistance (2.0 m length): 7.88 ± 0.50 Ω from center to outer conductor.
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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: Standard 75Ω triaxial FEP insulated; available lengths 0.5, 1, 1.5, 2, 3, 5, or 9 meters. Extended temperature range PFA cable optional.
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Tensile Strength: 330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connector.
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Connector Material: Gold-plated brass or beryllium copper; maximum torque 0.565 N·m.
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Probe Case Thread: 3/8-24 UNF with maximum engagement 0.563 in.
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Weight: 323 g/m (11.4 oz/m).
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Temperature Range (Probe Only): For EPL Ga/Gc: T1 -55°C to +232°C, T2 -55°C to +177°C, T3 -55°C to +120°C, T4 -55°C to +80°C, T5 -55°C to +40°C. For EPL Dc: various temperature ratings.
Industrial Applications and Use Cases
The Bently Nevada 330191-00-16-20-CN is ideal for monitoring shaft vibration, radial position, and differential expansion in turbines, compressors, pumps, and motors. Its 8 mm diameter and robust PPS tip provide superior resistance to physical abuse. The FluidLoc cable option (available separately) prevents oil leakage through the cable interior, making it suitable for lubricated machinery. By ensuring accurate and stable measurements, this probe helps avoid costly unscheduled downtime, directly improving return on investment.
Reliability and Maintenance Advantages
Designed with a patented TipLoc molding method, the probe tip and body bond is stronger, reducing the risk of detachment. The CableLoc design increases cable retention. The Viton O-ring seals differential pressure between tip and case. These features extend service life and reduce the frequency of recalibration or replacement. The probe’s stainless steel case and gold-plated connectors resist corrosion. Routine inspection of cable integrity and connector torque is recommended to maintain optimal performance.
Selection Guide and Purchasing Advice
When ordering, verify the thread size (3/8-24 UNF), overall case length (1.6 in), total length (2.0 m), and agency approval (CN). This probe does not require an extension cable for 1-meter systems. For compatibility, use with Bently Nevada extension cables and proximitor. PLC Source PRO supplies this Bently Nevada 330191-00-16-20-CN as new, original factory-packed with a 12-month warranty. Contact our team for assistance with selecting the correct cable option or armor.