Bently Nevada 330173-00-02-20-02-CN 3300 5mm Proximity Probe

Product Overview

The 330173-00-02-20-02-CN is a high-precision 3300 5 mm Transducer engineered by Bently Nevada for critical machinery protection. As a fundamental component of the 3300 XL series proximity transducer system, this probe is designed to measure static (gap) and dynamic (vibration) distances between the probe tip and the observed target. Primarily utilized in steam turbines, centrifugal compressors, and power generation pumps, the 330173 provides the essential data required for early fault detection in rotating equipment. Its compact M8 x 1 threaded body and 5 mm tip diameter allow for installation in tight mechanical clearances, ensuring that vibration levels are monitored with sub-micron accuracy to prevent catastrophic machine failure and unplanned outages.

Technical Configuration 

The specific nomenclature 330173-00-02-20-02-CN defines a tailored hardware configuration for specialized industrial mounting. This model features an M8 x 1 metric thread with an Unthreaded Length of 0 mm (00) and a total Case Length of 20 mm (02), providing a compact footprint for shallow-depth applications. The 2.0 metre (20) total length cable is equipped with a ClickLoc miniature coaxial connector (02), ensuring a secure, vibration-resistant connection to the extension cable. Furthermore, the CN suffix indicates specific agency approvals for international compliance. Designed without armor, this probe offers maximum flexibility for routing through conduit systems while maintaining the electrical characteristics required for a linear scale factor of 200 mV/mil (7.87 V/mm) when paired with the appropriate Proximitor sensor.

Technical Specifications

Proximity System FAQ

Is the 330173-00-02-20-02-CN compatible with 3300 XL Proximitor Sensors?Yes. This 5 mm probe is designed to be fully compatible with the 3300 XL 5 mm and 8 mm Proximitor systems. However, ensure the total system length (probe plus extension cable) matches the Proximitor's calibrated length (typically 5 or 9 metres).

What is the benefit of the ClickLoc connector?The ClickLoc miniature coaxial connector features a specialized locking mechanism that prevents the connection from loosening due to machine vibration. It also includes a fluid-resistant seal to prevent oil or contaminants from entering the coaxial signal path.

How do I adjust the probe gap for this specific model?Because this model has a 0 mm unthreaded length, the gap is adjusted by rotating the probe within the M8 threaded mounting bracket. Use a voltmeter to monitor the Proximitor output; typically, a gap set at -10 VDC represents the center of the linear range.

Engineering & Installation Guide

• Mechanical Mounting Torque: When installing the M8 x 1 threaded probe, do not exceed the maximum torque specification of 6 Nm (4.4 ft-lb). Over-tightening can deform the probe case or damage the internal sensing coil, leading to signal drift or failure.

• Cable Routing and Bend Radius: Maintain a minimum bend radius of 25.4 mm (1.0 inch) for the non-armored coaxial cable. Avoid routing the probe lead alongside high-voltage AC lines to prevent EMI (Electromagnetic Interference) from distorting the vibration data.

• Target Material Calibration: The 330173 is factory-calibrated for AISI 4140 steel. if the target shaft is made of a different material (e.g., stainless steel or chrome-plated), the scale factor must be adjusted within the monitoring system software to maintain accuracy.

Engineering Advantages

The Bently Nevada 330173 is renowned for its exceptional thermal stability and environmental resilience. The probe tip is constructed from high-performance polyphenylene sulfide (PPS), which resists chemical corrosion and moisture absorption at temperatures up to 177 Celsius. The 02-20 mm case configuration is specifically optimized for machines where internal space is at a premium, allowing for radial vibration or axial thrust measurements in tight bearing housings. This "Made in U.S.A" transducer represents the industry standard for reliability, ensuring that safety-critical machinery remains under constant, high-fidelity surveillance.