Description

The Bently Nevada 330101-00-15-20-02-05 is a high-reliability, non-contact 8 mm proximity probe designed as a core sensing component for the 3300 XL 8 mm Proximity Transducer System. Engineered for demanding machinery protection applications, this specific configuration features a fully threaded 3/8-24 UNF stainless steel body without protective armor, making it ideal for standard installations where mechanical shielding is already provided or space constraints prevent armored casing. It is defined by a 0.0-inch unthreaded length (00) and a compact 1.5-inch overall case length (15) to mount directly into shallow machine housings or bearing caps.

This proximity probe is built with a 2.0-meter (6.6 ft) total cable length (20) using standard high-frequency coaxial cable, terminated with a robust gold-plated miniature coaxial ClickLoc connector (02). To meet rigorous global safety standards, the assembly is certified under option 05, providing full CSA, ATEX, and IECEx approvals for use in hazardous areas. In critical monitoring loops, the probe works by transmitting high-frequency eddy currents to detect static or dynamic shaft motion, supplying raw displacement data to 3500 series racks and Proximitor sensors without needing manual field calibration.

Features

• 8 mm High-Performance Tip: Designed with a premium polyphenylene sulfide (PPS) plastic tip to withstand harsh turbine and compressor environments.
• Fully Threaded Body: Standard 3/8-24 UNF thread without armor provides maximum mounting adaptability with 0.0-inch unthreaded and 1.5-inch case options.
• Integrated 2.0-Meter Cable: Low-loss standard coaxial cable terminated with a gold-plated miniature ClickLoc connection.
• Hazardous Area Certified: Includes comprehensive CSA, ATEX, and IECEx approvals (05 option) for explosive or highly hazardous industrial locations.
• Viton Pressure Seal: Incorporates an internal Viton O-ring designed to seal differential pressure between the probe tip and casing, preventing turbine oil leakage.
• Backward Compatibility: Fully interchangeable with standard, non-XL Bently Nevada 3300 series 5 mm and 8 mm system components.

Applications

• Steam and gas turbine shaft vibration monitoring.
• Fluid-film bearing radial vibration and axial position measurements in rotating machinery.
• High-speed centrifugal compressor and pump shaft displacement protection.
• Tachometer speed sensing and Keyphasor reference measurements on critical utility assets.
• Permanent machinery monitoring installations requiring high accuracy and thermal stability.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Verify the machinery thread depth matches the 1.5-inch case length of this probe to prevent physical contact with the shaft target during machine startup.
• Establish the appropriate probe gap (typically 1.27 mm or 50 mils) using a digital voltmeter connected to the 3300 XL Proximitor sensor output during offline calibration.
• Always run the probe cable through dedicated, grounded metal conduits to eliminate external radio frequency interference (RFI) or electromagnetic interference (EMI).
• Ensure that probe-to-extension cable connections are clean, dry, and protected from oil exposure. Standard silicone tape may be wrapped around the connection if direct turbine oil exposure is expected.

Compliance and Certifications

• CSA: Approved for Class I, Division 1 and 2 locations with compatible intrinsic safety barriers.
• ATEX/IECEx: Certified for Zone 0, 1, and 2 applications (Ex ia / Ex nA classifications).
• CE Mark: Fully compliant with electromagnetic compatibility and safety directives.