Description

The Bently Nevada 330101-00-66-20-02-00 is an unarmored 8 mm proximity probe designed as a core component of the 3300 XL 8 mm Proximity Transducer System. This specific transducer configuration is defined by its 3/8-24 UNF-2A threaded case, featuring an unthreaded length of 0.0 inches (00) and an overall case length of 6.6 inches (66). It is equipped with a 2.0-meter (6.6 feet) total length integral cable (20) that terminates in a miniature coaxial ClickLoc connector (02) on standard coaxial cable. Intended for non-hazardous locations (00), this fully threaded probe configuration offers high flexibility for custom depth adjustment inside bearing housings, brackets, or machine casings where non-contact shaft vibration and dynamic position measurement are required.

Operating on eddy-current measurement principles, this probe provides a highly stable, linear voltage output when paired with a compatible 3300 XL Proximitor Sensor and extension cable. The rugged design features a polyphenylene sulfide (PPS) tip and a corrosion-resistant stainless steel body, allowing it to withstand high pressure, moisture, and chemical exposure typical of critical rotating machinery. By capturing high-frequency vibration and position changes, this sensor delivers clean diagnostics to help prevent machinery failures in turbines, compressors, and pumps.

Features

• Standard unarmored probe body with 3/8-24 UNF-2A threads.
• 0.0 inches of unthreaded body length (fully threaded) provides maximum mounting depth versatility.
• 6.6 inches of overall case length to accommodate deep casing penetrations.
• 2.0 meters of standard high-frequency coaxial cable.
• Polyphenylene sulfide (PPS) tip with a high-strength stainless steel probe body for robust seal integrity.
• Terminated with a miniature coaxial ClickLoc connector to ensure reliable electrical connection.

Applications

The 330101-00-66-20-02-00 proximity probe is typically deployed in the following industrial rotating machinery protection systems:

• Radial vibration and shaft dynamic movement tracking.
• Axial thrust position and thermal expansion monitoring on industrial steam and gas turbines.
• Rotor displacement and shaft centerline measurements in centrifugal compressors.
• Vibration monitoring on high-speed pumps, fans, and industrial gearboxes.

Ordering Information

Technical Specifications

Installation Guidelines

To ensure high accuracy and reliable long-term performance, follow these key installation procedures:

• Gap Adjustment: Mount the probe at the proper physical distance from the target surface. Adjust the gap per system calibration, normally representing a -10 Vdc output on the companion Proximitor sensor (typically around 1.27 mm or 50 mils).
• Mechanical Locking: Securely tighten the probe in place using a standard locknut or jam nut to prevent rotational shift under machine operating vibrations.
• Cable Protection: Route the 2.0-meter probe cable carefully, avoiding sharp bends, pinching, or high-abrasion surfaces. Use conduit or dedicated cable trays when running paths outside the machine.
• Shielding: Keep the coaxial cable shields intact up to the termination point at the Proximitor sensor to block electromagnetic and radio-frequency noise from corrupting vibration telemetry.

Compliance and Certifications

This product configuration incorporates the '00' Agency Approval Option, indicating that no explosive or hazardous area certifications are applied. It is designated for general-purpose, non-hazardous industrial installations. For certified explosion-proof, intrinsically safe, or non-incendive environments, select the counterpart probe options with Option E designated as '05'.