Product Overview
When vibration monitoring systems face harsh conditions, the Bently Nevada 330191-00-40-50-00 provides a robust solution. This 3300 XL 8 mm ETR probe, without armor, is engineered to withstand physical abuse and prevent common failure modes such as probe tip separation and cable pull-out. Designed for use with 5-meter Proximitor sensors only, this model features a patented TipLoc molding method that ensures a stronger bond between the probe tip and body, and a CableLoc design delivering 330 N (75 lbf) pull strength. The optional FluidLoc cable option prevents oil leaks through the cable interior.
Technical Specifications
The Bently Nevada 330191-00-40-50-00 offers precise performance metrics directly from the datasheet:
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Power Supply: Requires -17.5 Vdc to -26 Vdc (non-incendive circuit, 12 mA max), -23 Vdc to -26 Vdc with barriers.
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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 (RPROBE): 8.73 Ω ± 0.50 at 5.0 m length.
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Cable: Standard 75 Ω triaxial FEP insulated; extended temperature range with PFA insulation.
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Tensile Strength: 330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connectors.
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Probe Case Thread: 3/8-24 UNF, max thread engagement 0.563 in.
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Weight: 323 g/m (11.4 oz).
Industry Applications
In rotating machinery monitoring, the Bently Nevada 330191-00-40-50-00 performs critical radial vibration and position measurements. Typical applications include steam turbines, centrifugal compressors, and large pumps. Its 8 mm probe size with thicker PPS encapsulation provides optimal robustness against physical abuse, making it ideal for high-vibration environments. The probe seals differential pressure between tip and case using a Viton O-ring, preventing contamination ingress.
Maintenance & Reliability
Routine inspection of the probe cable and connectors ensures long service life. The Bently Nevada 330191-00-40-50-00 uses gold-plated brass or beryllium copper connectors that resist corrosion. The probe body is AISI 303/304 stainless steel, offering excellent durability. Follow the temperature schedules: for EPL Ga/Gc, probe ambient temperature ranges from -55°C to +232°C (T1) down to -55°C to +40°C (T5). This wide range supports extreme industrial environments. The patented CableLoc and TipLoc features reduce common failure points, minimizing unplanned downtime.
Compatibility & Integration
The Bently Nevada 330191-00-40-50-00 is designed for 5-meter systems only, requiring a 5-meter Proximitor sensor. It connects via 75 Ω triaxial cable to BN extension cables and BN Proximitors. One-meter systems do not use an extension cable. For entity parameter compliance, always use BN extension cables. The probe is available with standard or extended temperature range cable options, and optional flexible armor (AISI 302/304 SST with FEP jacket).
Selection Guide
When ordering the Bently Nevada 330191-00-40-50-00, verify the unthreaded length (00 = 0.0 in), overall case length (40 = 4.0 in), and total length (50 = 5.0 m / 16.4 ft). Agency approval option is 00 (not required). For best results, use with BN Proximitors and extension cables from PLC Source PRO. This combination ensures reliable vibration data acquisition for predictive maintenance programs.