Bently Nevada 330171-00-08-05-02-CN 3300 5 mm Proximity Probe

Description

Providing reliable non-contact displacement and vibration measurements, the Bently Nevada 330171-00-08-05-02-CN represents a key element in machinery protection architectures. This 3300 series 5 mm proximity probe utilizes eddy current technology to capture dynamic shaft movement and static position data from rotating equipment. Encased in a rugged threaded housing, the unit features a high-performance polyphenylene sulfide (PPS) tip and a robust 75 ohm triaxial cable insulated with fluoroethylene propylene (FEP), ensuring signal integrity in harsh, hot, and oil-submerged industrial environments.

Features

• Precision Eddy Current Sensing: Enables continuous, non-contact measurement of shaft vibration and axial thrust position.
• Durable Case Material: Constructed from AISI 303/304 stainless steel to resist corrosive process gases and lubricating oils.
• ClickLoc Coaxial Connection: Uses a miniature coaxial ClickLoc connector for a secure, moisture-resistant link with the extension cable.
• Excellent Thermal Resilience: Operates reliably in extreme temperatures ranging from -35 degC to +177 degC.
• Robust Tensile Strength: Designed with a 222 N (50 lbf) rating from probe case to lead to prevent physical damage during installation.

Applications

• Turbo-machinery Protection: Installed in steam and gas turbines to monitor radial shaft vibration and rotor eccentricity.
• Compressor Shaft Alignment: Tracks axial thrust displacement in centrifugal and reciprocating compressors.
• Heavy Pump Monitoring: Detects mechanical wear and misalignment in high-pressure feed pumps and process pumps.
• Industrial Gearboxes: Provides real-time feedback on input/output shaft motion inside power transmission assemblies.

Ordering Information

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

While 3300 5 mm probes can interface with specific legacy proximity sensors, they are most reliably paired with standard 3300 and 3300 XL Proximitor sensors configured for 5 mm systems. Because this probe features a 0.5-meter total length, it requires a matching 4.5-meter extension cable to achieve the exact 5.0-meter system length required for correct sensor calibration (typically 200 mV/mil). Mismatched system lengths will distort the scale factor and lead to calibration errors during commissioning.

Application Pitfalls & Engineering Notes

The polyphenylene sulfide (PPS) probe tip is highly resistant to chemical attack but can chip or fracture under sudden physical impact. During target shaft alignment or coupling services, ensure the probe is fully retracted to prevent the rotating shaft from contacting the tip. Furthermore, ensure that the counterbore diameter surrounding the recessed probe tip is at least twice the tip's diameter (minimum 0.4 inches) to prevent side-loading signal interference from surrounding machine casing metals.

Commissioning & Wiring Tips

The miniature coaxial ClickLoc connection must remain completely free of dirt, oil, and moisture to ensure proper high-frequency signal transmission. Clean the connector contacts using a residue-free contact cleaner prior to coupling. It is highly recommended to apply silicone self-fusing tape or slide-on connector protectors over the connection joint to seal it against machine oil mist inside the terminal box or housing enclosure.

Installation Guidelines