330191-00-16-15-05 Bently Nevada 8 mm ETR Proximity Probe

What Is the 330191-00-16-15-05 Proximity Probe?

The 330191-00-16-15-05 is a Bently Nevada 3300 XL 8 mm ETR proximity probe. It carries a 3/8-24 UNF thread and ships without armor. Moreover, this unit includes CSA, ATEX, and IECEx agency approvals. The probe uses a 1.5 meter total length and a 1.6 inch overall case length.

Engineers specify this probe for precise shaft displacement and vibration measurement. The 8 mm tip provides a thicker encapsulation of the probe coil in molded PPS plastic. Consequently, the probe resists physical abuse better than smaller-diameter designs.

Key Specifications of the 330191-00-16-15-05

• Input voltage: -17.5 Vdc to -26 Vdc with a nonincendive circuit per drawing 140979.
• Current draw: 12 mA maximum consumption.
• Barrier operation: -23 Vdc to -26 Vdc with barriers.
• Output resistance: 50 Ω.
• Nominal probe DC resistance: 7.73 ± 0.50 Ω at 1.5 m.
• Probe tip material: Polyphenylene sulfide (PPS).
• Probe case material: AISI 303 or 304 stainless steel.
• Cable type: 75 Ω triaxial, FEP insulated.
• Tensile strength: 330 N (75 lbf) probe case to probe lead.

Operation at a more positive voltage than -23.5 Vdc can reduce linear range. Therefore, verify supply polarity and barrier configuration before commissioning.

Comparison With Alternative Probe Configurations

Buyers often compare this 8 mm ETR probe against 5 mm and armored variants. The table below summarizes the differences based on available data.

• 330191-00-16-15-05 (this unit): 8 mm tip, no armor, 1.5 m length, CSA/ATEX/IECEx.
• 5 mm probes: smaller tip encapsulation; less robust against physical abuse.
• Armored probes: flexible AISI 302 or 304 SST with FEP outer jacket for added mechanical protection.
• FluidLoc option: prevents oil leakage through the cable interior; not specified on this unit.

Accordingly, the 8 mm body offers a stronger case than smaller diameters. For high-vibration machinery, that robustness matters.

Installation and Integration Notes

Mount the probe using the 3/8-24 UNF thread with a maximum thread engagement of 0.563 in. The minimum unthreaded length is 0.0 in. Maximum connector torque is 0.565 N•m (5 in•lbf).

Probe entity parameters are met when used with Bently Nevada extension cables and connected to Bently Nevada Prox. One-meter systems do not use an extension cable. However, this 1.5 m unit pairs with a compatible extension cable.

When wiring into fieldbus or plant networks, an external gateway or connection module may be required. Confirm cables and gateways with the supplier before installation.

Reliability and Environmental Ratings

The probe seals differential pressure between tip and case with a Viton O ring. Probes are not pressure tested prior to shipment. For EPL Ga and Gc, ambient temperature ranges from -55°C to +232°C depending on T-class. For EPL Dc, T280°C applies at Ta -55°C to +232°C.

Inspect periodically for cable wear and connector integrity. Follow the manufacturer's safety manual for all maintenance.