Product Overview
The Bently Nevada 330191-40-75-10-05 is a 3300 XL 8 mm ETR proximity probe designed for critical vibration and position monitoring in rotating machinery. This model features a 3/8-24 UNF thread, an unthreaded length of 4.0 inches, and a 7.5-inch overall case length, with a total cable length of 1.0 meter (3.3 feet). It carries CSA, ATEX, and IECEx agency approvals, ensuring safe operation in hazardous environments. Patented TipLoc and CableLoc technologies provide superior mechanical strength, with a 330 N (75 lbf) pull strength to resist cable pull-outs.
Technical Specifications
Key performance parameters for the Bently Nevada 330191-40-75-10-05 include:
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Power Supply: Requires -17.5 Vdc to -26 Vdc (nonincendive circuit) at 12 mA max; with barriers, -23 Vdc to -26 Vdc.
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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: For 1.0 m 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: 75Ω triaxial FEP insulated (standard) or PFA (extended temperature range).
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Tensile Strength: 330 N (75 lbf) probe case to lead; 270 N (60 lbf) at connectors.
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Connector Material: Gold-plated brass or beryllium copper.
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Connector Torque: 0.565 N·m (5 in·lbf) maximum.
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Weight: 323 g/m (11.4 oz).
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Temperature Classification: For EPL Ga/Gc: T1 (-55°C to +232°C) through T5 (-55°C to +40°C).
Industry Applications
The Bently Nevada 330191-40-75-10-05 is ideal for vibration monitoring in compressors, turbines, pumps, and fans. Its robust 8 mm probe tip withstands physical abuse in harsh industrial environments. The optional FluidLoc cable prevents oil leakage from machine internals, making it suitable for lubricated rotating equipment. The probe seals differential pressure with a Viton O-ring, reducing common failure modes caused by fluid ingress.
Installation & Setup
Mount the Bently Nevada 330191-40-75-10-05 using the 3/8-24 UNF thread with maximum engagement of 0.563 inches. Ensure the probe tip is clean and free of debris. When installing with extension cables, use only BN extension cables to maintain entity parameters. For one-meter systems, no extension cable is required. Torque connectors to 0.565 N·m maximum. Verify the power supply voltage meets the -17.5 Vdc to -26 Vdc range; operation above -23.5 Vdc may reduce linear range.
Maintenance & Reliability
The patented TipLoc molding and CableLoc design in the Bently Nevada 330191-40-75-10-05 reduce maintenance needs by preventing probe tip separation and cable breakage. Inspect the Viton O-ring for cracks during routine maintenance. The probe is not pressure tested before shipment; verify sealing if used in differential pressure applications. The FEP or PFA cable insulation resists chemical attack, extending service life in aggressive environments.
Selection Guide & Purchasing Advice
When ordering a Bently Nevada 330191-40-75-10-05, confirm the total cable length (1.0 meter) and agency approvals (CSA, ATEX, IECEx) match your site requirements. For longer runs, select probes with extension cables listed in the standard cable options. PLC Source PRO offers new, factory-packaged units with a 12-month warranty. Verify compatibility with your Bently Nevada proximity system before purchase.