Description

The Bently Nevada 330101-00-75-10-02-00 is a high-precision 8 mm proximity probe engineered for continuous non-contact vibration and shaft position measurements in critical rotating machinery. As a specific variant within the 3300 XL 8 mm Proximity Transducer System, this probe is characterized by its fully threaded configuration with an unthreaded length of 0.0 inches (0 mm), a standard overall case length of 7.5 inches (190.5 mm), a 1.0-meter (3.3 feet) total probe length, a miniature coaxial ClickLoc connector on standard cable, and a design suited for non-hazardous general purpose installations with no agency approvals required.

Operating on the eddy current principle, the probe generates a high-frequency electromagnetic field that detects static and dynamic distances between the probe tip and a conductive metal target (typically AISI 4140 steel). When combined with a compatible 3300 XL Proximitor sensor and extension cable, it creates a robust monitoring chain that outputs a continuous voltage signal directly proportional to the physical gap. This configuration is widely deployed on heavy-duty machinery casings and bearing housings to monitor turbomachinery performance and provide critical input to machinery protection systems, including the Bently Nevada 3500 platform.

Features

• 8 mm tip diameter optimized for non-contact eddy current displacement measurement
• Fully threaded 3/8-24 UNF-2A stainless steel (303 SST) probe body without protective armor
• Rugged polyphenylene sulfide (PPS) tip material offering resistance to chemical degradation and high temperatures
• Equipped with a miniature coaxial ClickLoc connector ensuring a secure, vibration-proof connection
• Standard cable jacket providing excellent durability and abrasion protection in machinery environments
• 0.0 inches of unthreaded length, allowing maximum thread engagement in deep or flush-mount threaded holes
• High-linearity performance with minimal drift over wide operating ranges

Applications

• Radial vibration monitoring of gas turbine, steam turbine, and generator shafts
• Rotor axial displacement and thrust position tracking in high-speed compressors, fans, and pumps
• Keyphasor and phase reference tracking for machinery speed and dynamic analysis
• Continuous eccentricity, thermal expansion, and casing distortion measurements
• Machinery condition monitoring and automatic shutdown systems for critical rotating assets

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Probe Gap Calibration: Set the mechanical gap to center the sensor within its linear range. For most vibration monitoring applications, adjust the probe gap to achieve a DC voltage reading of -9 Vdc (approximately 1.27 mm or 50 mils) on the Proximitor output.
• Thread Engagement Limits: Keep maximum thread engagement under 0.563 inches (14.3 mm) for the 3/8-24 threads to prevent mechanical binding or cross-threading in internal brackets.
• Cable Protection: Route the probe cable through dedicated metal conduit or cable trays. Avoid sharp bends that violate the minimum bending radius of the coaxial cable to protect the internal conductor from cracking.
• Grounding Practices: Ensure the system shield is continuous and grounded at the monitor end only. This prevents ground loops and electrical noise from interfering with delicate vibration signals.

Compliance and Certifications

• Hazardous Area Approval: None (Segment E option 00 signifies a standard non-certified model intended for general purpose or non-hazardous areas)
• RoHS Compliant: Yes