330191-00-16-20-05 | Bently Nevada 3300 XL 8mm ETR Probe

Product Overview

When machine vibration threatens production uptime, the Bently Nevada 330191-00-16-20-05 provides reliable, precise measurement. This 3300 XL 8 mm ETR proximity probe is designed for permanent installation in critical rotating machinery, delivering accurate shaft displacement and vibration data that helps maintenance teams detect problems early. As a genuine Bently Nevada component, it meets the rigorous quality standards that industrial plants worldwide trust.

Key Technical Specifications

Every specification below is verified from the manufacturer's data:

Model: 330191 - 3300 XL 8 mm ETR Probe, 3/8-24 UNF thread, without armor

Total Length: 2.0 meters (6.6 feet)

Overall Case Length: 1.6 inches

Minimum Unthreaded Length: 0.0 inches

Probe Tip Material: Polyphenylene sulfide (PPS)

Probe Case Material: AISI 303 or 304 stainless steel (SST)

Cable: 75Ω triaxial, FEP insulated, available in 0.5, 1, 1.5, 2, 3, 5, or 9 meters

Extended Temperature Range Cable: 75Ω triaxial, PFA insulated, lengths 0.5, 1, 1.5, 2, 5, or 9 meters

Tensile Strength: 330 N (75 lbf) probe case to probe lead; 270 N (60 lbf) at connectors

Connector Material: Gold-plated brass or gold-plated beryllium copper

Maximum Connector Torque: 0.565 N•m (5 in•lbf)

Probe Weight: 323 g/m (11.4 oz)

Power Supply: Requires -17.5 Vdc to -26 Vdc at 12 mA maximum consumption

Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage

Output Resistance: 50 Ω

Nominal Probe DC Resistance: 7.88 ± 0.50 Ω (for 2.0 m length)

Approvals: CSA, ATEX, IECEx

Industry Applications

This probe excels in turbomachinery monitoring, including steam turbines, gas turbines, compressors, and pumps. Its robust design handles harsh environments, and the optional FluidLoc cable option prevents oil leakage through the cable interior—a common issue in rotating equipment. The 8 mm tip provides thicker encapsulation, offering superior resistance to physical abuse compared to smaller probes.

Installation & Setup Guidance

Proper installation is critical for accurate readings. Follow these guidelines:

Mount the probe with the specified 3/8-24 UNF thread, ensuring maximum thread engagement of 0.563 inches.

Apply the recommended connector torque of 0.565 N•m (5 in•lbf) to avoid damaging the gold-plated connectors.

Use the appropriate extension cable (if needed) to achieve the desired total length. One-meter systems do not use an extension cable.

For hazardous areas, connect per installation drawing 140979 to maintain nonincendive circuit integrity.

Verify the power supply voltage is within -17.5 Vdc to -26 Vdc; operation above -23.5 Vdc may reduce linear range.

Maintenance & Reliability

Regular inspection of the probe and cable is recommended to ensure reliable operation. Check for physical damage, cable wear, and connector tightness. The patented TipLoc molding and CableLoc design provide 330 N (75 lbf) pull strength, reducing the risk of cable detachment. The Viton® O-ring seals differential pressure between the tip and case, but probes are not pressure tested prior to shipment—verify sealing in your application. For safety-rated installations, follow the manufacturer's safety manual for periodic testing.

Selection Guide & Purchasing Advice

Before ordering, confirm the total probe length (2.0 meters for this model) and the required approvals (CSA, ATEX, IECEx). If your environment involves liquids, consider the FluidLoc cable option. Always purchase from a reputable supplier to ensure genuine parts and warranty coverage. BluePLC Industrial offers this 330191-00-16-20-05 as new, original factory-packed with a 12-month warranty. Contact BluePLC Industrial for current availability and lifecycle status before ordering.

For complete technical specifications for the 330191-00-16-20-05, please contact BluePLC Industrial.