Description

The Bently Nevada 330101-00-37-05-02-00 is an 8 mm proximity probe designed for high-precision, non-contact machinery vibration, position, and shaft displacement measurements. As a core sensor element of the 3300 XL 8 mm Proximity Transducer System, this probe utilizes eddy-current measurement principles to monitor rotating machinery components without making physical contact. This specific model features a fully threaded 3/8-24 UNF-2A stainless steel housing with an unthreaded length of 0.0 inches (A: 00) and an overall case length of 3.7 inches (B: 37). It is equipped with a short 0.5-meter (1.6 feet) total FEP-insulated coaxial cable (C: 05) terminated in a standard miniature coaxial ClickLoc connector (D: 02) without a connector protector, and does not require specialized hazardous area agency approvals (E: 00). It is engineered for long-term installation on bearing housings or machinery casings, providing critical shaft displacement data directly to Proximitor sensors and 3500 series monitoring racks.

Features

• Non-contact eddy-current sensing technology eliminates physical wear and maintains calibration stability.
• Robust polyphenylene sulfide (PPS) molded probe tip provides reliable performance in extreme industrial environments.
• Fully threaded 3/8-24 UNF-2A stainless steel case ensures clean, precise mechanical mounting on bearing housings.
• Miniature gold-plated ClickLoc coaxial connector provides solid physical feedback and a secure electrical connection.
• High-temperature, fluid-resistant FEP insulated coaxial cable handles exposure to synthetic lubricants and machine oils.
• Fully interchangeable with classic 3300 series 5 mm and 8 mm components when proper system pairing is observed.

Applications

• Radial shaft vibration and axial thrust position monitoring on steam and gas turbines.
• Rotor dynamic studies and casing displacement measurements in centrifugal compressors.
• Critical machinery protection for large boiler feed pumps, industrial fans, and generators.
• Industrial gearboxes and rotating machinery shafts requiring reliable non-contact distance and eccentricity tracking.

Ordering Information

The 330101 series utilizes a multi-segment dash-code system to define exact physical and mechanical characteristics. The table below outlines the decoded option configuration for this specific part number:

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Gap Adjustment: Calibrate the probe gap relative to the target face to achieve approximately -9 Vdc output (or 1.27 mm / 50 mils gap) corresponding to the midpoint of the linear displacement range.
• Routing Constraints: Ensure the probe cable is securely routed along the machine body, maintaining a minimum bend radius of 25.4 mm (1.0 in). Avoid routing cables near high-voltage lines or sources of electro-magnetic noise.
• Housing Mounting Torque: Carefully thread the probe into its bracket. Do not exceed the maximum rated installation torque of 11.2 N-m (100 in-lbf) to prevent casing damage. Recommended installation torque is 7.5 N-m (66 in-lbf).
• Locking Mechanism: Always ensure the miniature ClickLoc coaxial connector is fully clicked into its extension cable mate. Protect connection joints in wet or oily environments to prevent signal attenuation.