Description

The Bently Nevada 330101-10-27-05-02-05 is a standard 3/8-24 UNF threaded 8 mm proximity probe configured with a 1.0-inch unthreaded length and a 2.7-inch overall case length. Designed without protective armor, this eddy-current displacement sensor features a 0.5-meter (1.6-foot) total cable length terminated with a miniature coaxial ClickLoc connector. Engineered with the -05 agency option, it carries international hazardous area certifications including CSA, ATEX, and IECEx. This specific combination is highly tailored for short-run connections directly to bearing housings or conduit boxes where mechanical armor is unnecessary, but robust non-contact vibration monitoring and shaft position sensing under strict safety compliance is required.

As part of the 3300 XL 8 mm Proximity Transducer System, this probe plays a key role in continuous machinery protection and condition monitoring. By generating a high-frequency RF field, the sensor detects dynamic and static distances to conductive metal targets (typically an AISI 4140 steel shaft). This probe pairs with a 3300 XL Proximitor sensor and an extension cable to complete a fully calibrated 5-meter or 9-meter transducer loop, feeding high-fidelity displacement metrics to the Bently Nevada 3500 monitoring rack or other TSI platforms.

Features

• Standard 8 mm tip diameter optimized for eddy-current non-contact proximity measurements.
• 1.0-inch unthreaded length combined with a 2.7-inch case length for targeted recess or bracket mounting.
• Short 0.5-meter (1.6-foot) standard coaxial cable with integrated ClickLoc gold-plated connector.
• Unarmored configuration is ideal for secure, pre-conduit routing paths inside machinery casings.
• Fully certified for global hazardous area applications under ATEX, IECEx, and CSA regulations.
• Robust construction with polyphenylene sulfide (PPS) tip material and AISI 303 stainless steel case body.

Applications

This proximity probe is deployed across various heavy industries to measure shaft radial vibration, axial position, and speed. Typical rotating machinery applications include:

• Steam and gas turbine shaft vibration and thermal expansion tracking.
• Centrifugal and reciprocating compressor rotor axial displacement.
• Boiler feed pumps, cooling water pumps, and critical industrial fans.
• Gearbox input and output shaft alignment and radial dynamic motion.
• Hydroelectric generator thrust bearing position monitoring.

Ordering Information

The part number 330101-10-27-05-02-05 represents a highly specific physical configuration of the Bently Nevada 3300 XL 8 mm Proximity Probe family. The segment breakdown below defines this exact configuration:

Technical Specifications

Connections and Interfaces

The standard miniature coaxial ClickLoc connector is designed to couple securely with matching connectors on Bently Nevada extension cables. Below is the electrical mapping of the coaxial interface:

Installation Guidelines

To ensure precise eddy-current measurement performance, conform to the following installation instructions:

• Probe Gap: Mount the probe with an initial gap corresponding to approximately -9 Vdc output voltage (typically 1.27 mm or 50 mils) to place the target in the center of the linear range.
• Unthreaded Selection: The 1.0-inch unthreaded portion helps position the sensor inside standard bearing mounts. Ensure the unthreaded portion is gapped safely away from secondary metal structures to avoid side-viewing interference.
• Cable Torque: Always hand-tighten the 3300 XL ClickLoc gold connectors until they "click" into position. Do not use tools on the connectors.
• Cable Routing: Observe the minimum bend radius of 25.4 mm (1.0 in) and secure the cable against vibration-induced rubbing or pinching.

Compliance and Certifications

This probe configuration carries the following approvals under the -05 option:

• CSA: Class I, Division 1 & Division 2, Groups A, B, C, D (when installed with appropriate barriers)
• ATEX: II 1 G Ex ia IIC T5...T1 Ga; II 3 G Ex nA IIC T5...T1 Gc
• IECEx: Ex ia IIC T5...T1 Ga; Ex nA/ec IIC T5...T1 Gc