Product Introduction
The Bently Nevada 330191-00-40-10-CN is a 3300 XL 8 mm ETR Proximity Probe designed for reliable shaft vibration and position measurement in critical rotating machinery. This industrial automation module addresses common failure modes such as cable pull-out, oil leakage, and probe tip detachment. The probe incorporates patented TipLoc molding for a robust tip-to-body bond and CableLoc design providing 330 N (75 lbf) pull strength. An optional FluidLoc cable prevents oil leakage through the cable interior. The 1.0-meter system does not require an extension cable, simplifying installation.
Technical Specifications Breakdown
The Bently Nevada 330191-00-40-10-CN is built for demanding environments. Key parameters include:
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Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption (-23 Vdc to -26 Vdc with barriers). Operating at more positive voltage than -23.5 Vdc reduces linear range.
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Supply Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage.
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Output Resistance: 50 Ω.
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Nominal Probe DC Resistance: For 1.0 meter length, RPROBE = 7.59 ± 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 Options: Standard 75Ω triaxial FEP insulated cable; extended temperature range 75Ω triaxial PFA insulated cable. Armor optional (flexible AISI 302/304 SST with FEP outer jacket).
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Tensile Strength: 330 N (75 lbf) from probe case to lead; 270 N (60 lbf) at connectors.
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Connector Material: Gold-plated brass or gold-plated beryllium copper.
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Maximum Connector Torque: 0.565 N·m (5 in·lbf).
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Probe Case Thread: 3/8-24 UNF, maximum thread engagement 0.563 inches.
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Weight: 323 g/m (11.4 oz).
The Bently Nevada 330191-00-40-10-CN also features a Viton® O-ring seal for differential pressure but is not pressure-tested before shipment. Temperature classification ranges from T1 (up to 232°C) to T5 (up to 40°C) depending on EPL rating.
Industry Applications
This probe excels in turbomachinery, compressors, pumps, and motors where reliable proximity sensing is critical. For example, in a steam turbine, the Bently Nevada 330191-00-40-10-CN measures shaft radial vibration and axial position, alerting operators to imbalance or misalignment. Its robust cable pull strength prevents signal loss due to cable strain, a common failure in high-vibration environments. The FluidLoc option is ideal for oil-lubricated machines, eliminating false alarms caused by oil wicking into the cable. By addressing these failure modes, the probe minimizes unplanned downtime.
Installation & Setup Guidance
Mount the Bently Nevada 330191-00-40-10-CN using the 3/8-24 UNF thread, ensuring thread engagement does not exceed 0.563 inches to avoid damage. For the 1.0-meter system, connect directly to the monitor without an extension cable. Tighten connectors to 0.565 N·m (5 in·lbf) maximum. When routing the cable, avoid sharp bends and secure it to prevent vibration. For nonincendive circuits, follow installation drawing 140979. If using barriers, provide -23 Vdc to -26 Vdc supply.
Maintenance & Reliability
The Bently Nevada 330191-00-40-10-CN requires minimal maintenance. Periodically inspect the probe tip for wear or contamination. The PPS tip resists chemical attack, but verify the O-ring seal integrity in high-pressure differential applications. Check cable connectors for corrosion or overtightening. Extended temperature range cables (PFA) are recommended for environments above 120°C. By proactively replacing probes at the first sign of cable degradation, you maintain measurement accuracy and avoid unexpected failures. The 12-month factory warranty from PLC Source PRO provides additional peace of mind.
Selection Guide & Purchasing Advice
When ordering the Bently Nevada 330191-00-40-10-CN, verify the unthreaded length (00 = 0.0 in), overall case length (40 = 4.0 in), total length (10 = 1.0 meter), and agency approval (CN country specific). For longer systems, note that 0.5, 1.5, 2, 3, 5, or 9 meter lengths are available with standard or extended temperature cables. Optional armor adds protection. Choose FluidLoc if oil leakage is a concern. PLC Source PRO supplies this module as a new, original factory-packed unit. Ensure compatibility with your monitoring system (requires BN extension cables and BN Prox) before purchase.