Description

The Bently Nevada 330101-00-27-50-02-00 is an unarmored 8 mm proximity probe configured with a fully threaded 2.7-inch overall case length and zero unthreaded length. Designed for critical machinery protection, this specific variant features a 5.0-meter total cable length ending in a standard miniature coaxial ClickLoc connector (without a connector protector) and is designed for applications where hazardous area agency approvals are not required. It operates as part of the 3300 XL 8 mm Proximity Transducer System to provide precise, non-contact shaft vibration and displacement measurements in high-speed rotating machinery.

By utilizing eddy-current technology, the probe continuously monitors static and dynamic distance between the probe tip and the target rotating shaft. This enables early fault detection such as shaft imbalance, bearing wear, and misalignment before catastrophic failure occurs. The 330101 series is designed to withstand harsh industrial fluids and high operating temperatures typically found within generator casings and bearing housings.

Features

• Standard 3/8-24 UNF thread profile with a 2.7-inch overall case length and a fully threaded (0.0-inch unthreaded) body.
• Generous 5.0-meter (16.4-foot) total cable length designed specifically to interface directly with 5.0-meter Proximitor sensors.
• Equipped with a miniature coaxial ClickLoc connector and standard (non-armored) cable casing.
• Fully unarmored construction, providing high flexibility and easier routing in tight machine conduits.
• Rugged tip design with a stainless steel probe body, engineered for long-term survival in harsh, oily industrial environments.
• High-accuracy eddy-current measurement principle for static (gap) and dynamic (vibration) displacement tracking.

Applications

Typical applications for this specific unarmored, 5-meter proximity probe configuration include:

• Steam and gas turbine shaft vibration and axial position monitoring.
• Rotor dynamic studies and radial displacement measurement in high-speed centrifugal compressors and turborefrigerators.
• Thrust bearing wear monitoring and shaft alignment verification in large utility pumps and industrial fans.
• Permanent machinery protection systems where conduits provide adequate physical shielding, eliminating the need for armored cabling.
• General industrial rotating equipment instrumentation where specialized hazardous area approvals are not mandated.

Ordering Information

The 330101-00-27-50-02-00 represents a distinct configuration of the Bently Nevada 3300 XL 8 mm proximity probe series. Below is the precise breakdown of this orderable SKU code:

Technical Specifications

Installation Guidelines

Proper installation of the 3300 XL 8 mm proximity probe is essential for achieving reliable eddy-current measurement performance. Adhere to the following engineering guidelines:

• Probe Gapping: Mount the probe with the correct mechanical gap relative to the target shaft. Typically, the probe is gapped to the center of its linear range (approximately 1.27 mm or 50 mils) as calibrated with the corresponding Proximitor sensor.
• Torque Limits: Do not exceed recommended mounting torque specs during installation to avoid damaging the threaded stainless steel body.
• Cable Integrity: Ensure the 5.0-meter cable is routed securely and is protected against pinching, sharp bends, or rubbing. Because this version is unarmored (without protective conduit sleeve), avoid routing in high-abrasion paths without external conduit.
• Shielding and Grounding: Connect the coaxial shield properly at the Proximitor sensor end to avoid electromagnetic interference and noise on the vibration signals.
• Compatibility: This 5.0-meter probe MUST be paired strictly with a 5.0-meter Proximitor sensor. Using it with a 9.0-meter sensor will result in severe calibration and measurement errors.