Description

Designed for non-contact machinery protection, the Bently Nevada 330101-00-30-10-02-05 is an 8 mm proximity probe engineered for high-accuracy shaft vibration and displacement monitoring. This specific configuration features an unthreaded length of 0.0 inches (0 mm) and an overall case length of 3.0 inches (76 mm), providing a fully threaded 3/8-24 UNF body. Equipped with a 1.0-meter total cable length, a standard unarmored coaxial cable, and a miniature coaxial ClickLoc connector, this probe is fully certified with CSA, ATEX, and IECEx agency approvals (option 05) for reliable safe operation in hazardous industrial areas.

Operating on the eddy-current principle, this probe detects shaft relative motion and axial position within turbine bearings, compressors, and pump housings without physical contact. The absence of an unthreaded section (0.0 inches) allows for maximum thread engagement into mounting holes, which is ideal for flush or shallow casing mount setups. When paired with a compatible 3300 XL extension cable and Proximitor sensor, this probe forms a robust transducer system with a linear range of 2.0 mm (80 mils) and a nominal scale factor of 7.87 V/mm (200 mV/mil).

Features

• 8 mm tip diameter optimized for non-contact eddy-current displacement and position measurements.
• Robust polyphenylene sulfide (PPS) probe tip and 303 stainless steel threaded probe body for demanding industrial environments.
• 3/8-24 UNF-2A threaded case without armor, facilitating direct panel or bearing housing installation.
• High-durability standard coaxial cable terminated with a miniature coaxial ClickLoc connector.
• Fully compatible with Bently Nevada 3300 XL series Proximitor sensors and standard extension cables.
• Hazardous area certifications including CSA, ATEX, and IECEx for Class I Zone 0 and Zone 2 environments.

Applications

• Steam and gas turbine shaft vibration and displacement monitoring.
• Thrust and radial position sensing in high-speed compressors.
• Rotor displacement measurements in boiler feed pumps and industrial fans.
• Permanently installed machinery protection systems (TSI) for critical rotating assets.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure precise displacement measurements, observe the following engineering guidelines when installing the probe:

• Mount the probe with the appropriate gap voltage as calibrated for the matching Proximitor sensor (typically -10 Vdc corresponding to a 1.27 mm or 50 mil gap for AISI 4140 steel targets).
• Ensure the unthreaded length (0.0 in) matches your mounting bracket depth, keeping the case threaded section secure without over-tightening.
• Avoid exceeding the maximum thread engagement limits of 0.563 inches to prevent binding during installation.
• Route probe and extension cables with proper grounding and shielding practices to prevent electrical interference from nearby rotating machinery.
• Hand-tighten the gold-plated miniature ClickLoc coaxial connector. Do not use excessive force or pliers unless transitioning between non-XL and XL connectors.

Compliance and Certifications

• EMC Standards: Compliant with EN 61000-6-2 (Immunity for Industrial Environments) and EN 61000-6-4 (Emissions for Industrial Environments) under the European EMC Directive 2014/30/EU.
• Hazardous Area Approvals: Certified for CSA, ATEX, and IECEx hazardous locations (Class I Zone 0/Zone 2, Class I Division 2, Groups A, B, C, D) under option 05.
• RoHS: Fully compliant with European Directive 2011/65/EU and China RoHS regulations.
• Functional Safety: SIL 2 certified (HFT = 0), SIL 3 compliant (HFT = 1) when implemented as part of a complete safety-instrumented system.