330191-00-16-90-00 Bently Nevada 8 mm ETR Probe, 9.0 m

Product Overview

In the evolution of industrial condition monitoring, the shift from periodic manual inspection to continuous, high-fidelity data acquisition has been driven by the need for early fault detection. The Bently Nevada 330191-00-16-90-00 proximity probe represents a mature, engineering-grade solution within the 3300 XL series. This 8 mm ETR probe features a 3/8-24 UNF thread and a 9.0-meter total length, making it suitable for extended reach applications. Its design incorporates a patented TipLoc molding method for a robust tip-to-body bond, and a CableLoc design that provides 330 N (75 lbf) pull strength. The probe case is constructed from AISI 303 or 304 stainless steel, with a polyphenylene sulfide (PPS) tip. This model is supplied without armor and with agency approval option 00 (not required).

Key Features & Technical Specifications

• Input Voltage: Requires -17.5 Vdc to -26 Vdc when installed with nonincendive circuit per drawing 140979.
• Output Current: 12 mA maximum consumption.
• Isolation: Not specified in available data; refer to official datasheet.
• Probe DC Resistance: 9.87 Ω ± 0.50 from center conductor to outer conductor.
• Total Length: 9.0 meters (29.5 feet).
• Thread: 3/8-24 UNF.
• Case Material: AISI 303 or 304 stainless steel.
• Tip Material: Polyphenylene sulfide (PPS).

Installation and Integration

Installation requires attention to the specified input voltage range. Operation at a more positive voltage than -23.5 Vdc can result in reduced linear range. The probe is designed to seal differential pressure between tip and case using a Viton O-ring, but it is not pressure tested prior to shipment. Maximum connector torque is 0.565 N·m (5 in·lbf). For integration with Bently Nevada extension cables and proximitors, the probe entity parameters are met when used with BN extension cables and connected to BN Prox. One-meter systems do not use an extension cable. When wiring into fieldbus networks, an external gateway or connection module may be required; confirm cables and gateways with the supplier.

Maintenance and Reliability

Periodic inspection is recommended to ensure cable integrity and connector condition. The probe's robust construction, including the thicker encapsulation of the probe coil in the PPS tip, provides enhanced resistance to physical abuse. Environmental factors such as temperature extremes should be considered; the probe alone supports ambient temperatures from -55°C to +232°C for T1 classification. For optimal reliability, avoid exceeding the maximum rated tensile strength of 330 N at the probe case-to-lead connection.