Description

The Bently Nevada 330101-00-72-20-02-05 is a high-precision 8 mm proximity probe belonging to the industry-standard 3300 XL series. Engineered for critical industrial machinery protection, this non-contacting sensor provides highly accurate, repeatable measurements of shaft vibration and dynamic position. Operating on the eddy-current principle, it detects microscopic changes in the gap between the probe tip and the target material, typically an AISI 4140 steel shaft.

This specific variant is customized for installations requiring a fully threaded case length of 7.2 inches with no unthreaded portion (0.0 inches of unthreaded length). It features a standard 3/8-24 UNF thread and is configured without mechanical armor, making it ideal for standard conduit or well-protected internal machinery mounts. With a total cable length of 2.0 meters (6.6 feet) and a standard miniature coaxial ClickLoc connector, it seamlessly connects to a 3300 XL extension cable and Proximitor sensor (such as the 330180 series) to form a complete monitoring chain. Certified with CSA, ATEX, and IECEx hazardous area approvals under option 05, this probe is fully qualified for safe deployment in petrochemical, power generation, and oil and gas facilities.

Features

• Non-contact eddy-current measurement for continuous, wear-free shaft vibration and position monitoring.
• Rugged polyphenylene sulfide (PPS) probe tip with a stainless steel body, optimized for harsh industrial chemical and thermal environments.
• Fully threaded 7.2-inch case with 3/8-24 UNF threads provides secure mechanical attachment and precise air-gap calibration.
• Integrated 2.0-meter standard cable terminated with a miniature coaxial ClickLoc connector.
• Designed for seamless integration with the Bently Nevada 3300 XL monitoring system and 3500 rack platforms.
• Certified for hazardous locations with global ATEX, IECEx, and CSA approvals.

Applications

• Steam and gas turbine shaft vibration and axial displacement monitoring.
• Centrifugal compressor and pump rotor position tracking.
• Gearbox input and output shaft lateral vibration analysis.
• Critical rotating machinery protection and machinery diagnostic systems (TSI).

Ordering Information

The Bently Nevada 3300 XL series proximity probes are configured through a multi-segment orderable dash-code system. The specific configuration of this SKU is decoded below:

Technical Specifications

Installation Guidelines

• Verify that the physical probe gap is calibrated to the correct DC voltage (typically -10.0 Vdc, corresponding to a 1.27 mm or 50 mils gap) prior to locking down the probe body.
• Ensure the unthreaded option code (00) is compatible with your bracket depth, ensuring the probe tip does not contact the rotating shaft during operation.
• Do not exceed the maximum recommended thread engagement length of 0.563 inches in standard mounts to prevent binding.
• Properly route the 2.0-meter probe cable and secure it with appropriate cable clamps to avoid mechanical wear or whipping against rotating equipment.
• Maintain clean, dry connector junctions and utilize connector protectors or silicone grease when installing ClickLoc connectors in high-moisture areas.

Compliance and Certifications

• ATEX/IECEx: Certified intrinsically safe (Ex ia IIC T5...T1 Ga) and non-sparking/ec (Ex nA/Ex ec IIC T5...T1 Gc) when connected to compatible barriers.
• CSA: Approved for Class I, Division 1 and 2 hazardous areas with matching certified system configurations.
• CE / RoHS: Compliant with European safety and hazardous substances directives.