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

Problem: Harsh Machine Environments Destroy Standard Probes

Industrial machinery exposes proximity probes to extreme temperatures, vibration, and physical abuse. Standard probes fail prematurely, causing costly unplanned downtime. The Bently Nevada 330191-00-16-05-05 solves this with an 8 mm probe tip that provides thicker encapsulation of the probe coil in molded PPS plastic. Consequently, this engineering-grade design delivers a more rugged probe and a stronger, more robust case.

Solution: 330191-00-16-05-05 Engineering-Grade Construction

This 3300 XL 8 mm ETR Probe features a patented TipLoc molding method that creates a robust bond between the probe tip and body. Additionally, the patented CableLoc design provides 330 N (75 lbf) pull strength to securely attach the probe cable and tip. The probe case uses AISI 303 or 304 stainless steel, while the probe tip is polyphenylene sulfide (PPS). The 3/8-24 UNF thread ensures precise mounting with a maximum thread engagement of 0.563 in.

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

• Input Voltage: Requires -17.5 Vdc to -26 Vdc with nonincendive circuit; -23 Vdc to -26 Vdc with barriers.
• Output Current: 12 mA maximum consumption.
• Isolation: Less than 2 mV change in output voltage per volt change in input voltage.
• Output Resistance: 50 Ω.
• Nominal Probe DC Resistance: 7.45 ± 0.50 Ω at 0.5 m length.
• Total Length: 0.5 meter (1.6 feet).
• Overall Case Length: 1.6 in.
• Unthreaded Length: Minimum 0.0 in.
• Agency Approvals: CSA, ATEX, IECEx.

Operation at a more positive voltage than -23.5 Vdc can result in reduced linear range. Therefore, precise voltage regulation is critical for accurate displacement measurement.

Installation and Compatibility

The 330191-00-16-05-05 integrates with Bently Nevada extension cables and proximitors. One-meter systems do not use an extension cable. For this 0.5 m probe, no extension cable is required. The probe seals differential pressure between tip and case using a Viton O-ring. However, probes are not pressure tested prior to shipment. When installing, verify that entity parameters are met by using BN extension cables and connecting to BN Prox. The standard cable is 75 Ω triaxial with FEP insulation. Extended temperature range cable uses PFA insulation.

Environmental Performance and Reliability

This probe operates across a wide temperature range. For EPL Ga and Gc, T1 classification allows -55°C to +232°C. T4 allows -55°C to +80°C. For EPL Dc, T280°C at Ta -55°C to +232°C. These ratings ensure reliable performance in extreme industrial environments. The 8 mm probe body provides optimal robustness against physical abuse. Therefore, Bently Nevada recommends using 8 mm probes whenever possible.