330191-00-08-10-00 Bently Nevada 8 mm ETR Proximity Probe

330191-00-08-10-00: Engineered for Precise Shaft Measurement

From a maintenance engineer's perspective, reliable machine protection begins with accurate, repeatable displacement measurement. The Bently Nevada 330191-00-08-10-00 is a 3300 XL 8 mm ETR proximity probe designed to deliver engineering-grade precision in the most demanding industrial environments. This 1-meter probe features a 3/8-24 UNF thread and no armor, making it suitable for direct mounting where cable protection is managed externally. Its robust construction and verified electrical characteristics ensure consistent performance for radial vibration and axial position monitoring.

Key Specifications and Performance Data

The 330191-00-08-10-00 operates with a supply voltage of -17.5 Vdc to -26 Vdc when installed with a nonincendive circuit per installation drawing 140979, drawing a maximum of 12 mA. When used with barriers, the supply range narrows to -23 Vdc to -26 Vdc. Operation at a more positive voltage than -23.5 Vdc can reduce the linear range. Sensitivity is less than 2 mV change in output voltage per volt change in input voltage, and output resistance is 50 Ω. The nominal probe DC resistance from center conductor to outer conductor is 7.59 ± 0.50 Ω for the 1.0-meter length. The probe tip is molded from polyphenylene sulfide (PPS), and the case is constructed from AISI 303 or 304 stainless steel. The standard cable is a 75 Ω triaxial, FEP-insulated probe cable. Tensile strength is rated at 330 N (75 lbf) from probe case to probe lead and 270 N (60 lbf) at the probe lead to extension cable connectors. The maximum connector torque is 0.565 N•m (5 in•lbf).

Reliability and Maintenance Insights

Maintenance engineers value the 330191-00-08-10-00 for its durable design and ease of service. The patented TipLoc molding method creates a robust bond between the probe tip and body, while the CableLoc design provides 330 N (75 lbf) pull strength to secure the probe cable. The 8 mm probe body offers a thicker encapsulation of the probe coil in the molded PPS tip, resulting in a more rugged probe that resists physical abuse. For extended service life, periodic inspection of the probe tip, cable, and connectors is recommended. Environmental factors such as temperature extremes and exposure to oils should be considered; the optional FluidLoc cable option prevents oil leakage through the cable interior. Always follow the manufacturer's safety manual for maintenance procedures.

Installation and Compatibility

The 330191-00-08-10-00 is designed for use with Bently Nevada extension cables and Proximity Transducers (Prox). One-meter systems do not use an extension cable. The 3/8-24 UNF thread allows for secure mounting, with a maximum thread engagement of 0.563 in. The probe seals differential pressure between the tip and case using a Viton O-ring, though probes are not pressure tested prior to shipment. When integrating into machinery protection systems, ensure that the probe entity parameters are met by using Bently Nevada extension cables and Prox. For precise matching and engineering support, contact AutoDCSTech with your exact requirements.