Product Overview
When probe tip detachment or cable pull failures compromise machine monitoring, the Bently Nevada 330191-00-33-20-00 provides a robust solution. This 8 mm proximity probe, part of the 3300 XL series, uses patented TipLoc molding to bond the tip to the body and CableLoc technology for 330 N (75 lbf) pull strength. It is designed for non-incendive circuits and provides reliable displacement sensing in turbine, compressor, and pump applications.
Technical Specifications
The Bently Nevada 330191-00-33-20-00 is configured as a 2.0-meter (6.6 ft) total length probe with 3.3-inch case length and 3/8-24 UNF thread, without armor. Key parameters include:
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Power Requirement: -17.5 Vdc to -26 Vdc (non-incendive circuit), -23 Vdc to -26 Vdc with barriers
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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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Probe DC Resistance (RPROBE): 7.88 ± 0.50 Ω at 2.0 m probe length
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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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Maximum Connector Torque: 0.565 N•m (5 in•lbf)
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Temperature Range (Probe Only): -55°C to +232°C (T1) down to -55°C to +40°C (T5) for EPL Ga/Gc
Industry Applications
The Bently Nevada 330191-00-33-20-00 excels in critical rotating machinery monitoring. In steam turbines, the 8 mm probe’s thicker PPS encapsulation resists physical abuse from moisture and debris. For large centrifugal compressors, the patented FluidLoc option prevents oil leakage along the cable, reducing false alarms. The 2.0-meter length suits close-coupled installations where space is tight.
Installation Guidance
Mount the Bently Nevada 330191-00-33-20-00 with hand-tightening to 0.565 N•m (5 in•lbf) maximum torque on the connector. Use the 3/8-24 UNF thread with 0.563-inch max engagement. For non-incendive wiring, follow drawing 140979 and ensure power is within -17.5 Vdc to -26 Vdc. One-meter systems do not require an extension cable; for longer runs, pair with 3300 XL extension cables. The Viton® O-ring seals differential pressure, but probes are not pressure-tested before shipment.
Maintenance & Reliability
To maximize service life of the Bently Nevada 330191-00-33-20-00, inspect the probe tip and cable for wear after each major outage. The stainless steel case resists corrosion in most industrial environments. Avoid operating below -23.5 Vdc, as this reduces linear range. The 75 Ω triaxial cable (FEP or PFA) should be protected from sharp bends. The cable’s 330 N pull strength minimizes breakage, but regular visual checks of the connector are recommended.
Selection Guide
When ordering the Bently Nevada 330191-00-33-20-00, verify your total probe length (2.0 m in this variant), unthreaded length (0.0 in), and agency approval option (none selected). For applications with oil ingress, specify the FluidLoc cable option. For extended temperature ranges, choose PFA-insulated cable. PLC Source PRO stocks this genuine Bently Nevada part with factory warranty, ensuring you receive a new, original product in factory packing.