Bently Nevada 330101-00-67-20-02-05 3300 XL 8 mm Proximity Probe

Description

The Bently Nevada 330101-00-67-20-02-05 is a high-performance 8 mm proximity probe designed for continuous, non-contact shaft displacement and vibration measurement in critical industrial machinery. This specific configuration is distinguished by having a completely threaded 6.7-inch (170 mm) case with no unthreaded portion (0.0-inch unthreaded length), an overall probe length of 2.0 meters (6.6 feet), a miniature coaxial ClickLoc connector without a connector protector, and full ATEX, IECEx, and CSA agency approvals for hazardous environments. Utilizing eddy-current technology, it provides high-precision distance monitoring of steam and gas turbines, centrifugal compressors, and heavy industrial pumps.

As an essential component of the Bently Nevada 3300 XL 8 mm Proximity Transducer System, the probe is fully compatible with the 330180 series Proximitor sensors and 330130 standard extension cables. The integrated 2.0-meter standard coaxial cable is insulated with fluoroethylene propylene (FEP) to survive extreme operating conditions. By capturing dynamic shaft clearances, this probe delivers vital vibration diagnostics directly to machine protection systems such as the Bently Nevada 3500 series rack, preventing catastrophic failures and reducing unplanned downtime.

Features

• 8 mm tip diameter optimized for precise, non-contacting eddy-current displacement measurements.
• Rugged polyphenylene sulfide (PPS) probe tip ensures maximum resistance against physical impacts and moisture ingress.
• AISI 303/304 stainless steel threaded body designed to survive corrosive industrial environments.
• Standard 75-ohm triaxial fluoroethylene propylene (FEP) insulated cable.
• Gold-plated brass Miniature coaxial ClickLoc connector for secure, reliable signal transmission.
• Seals differential pressure between the probe tip and case using a built-in Viton O-ring.
• Fully compliant with CSA, ATEX, and IECEx requirements for installation in hazardous zones.

Applications

• Steam and gas turbine shaft vibration and axial position measurement.
• Centrifugal compressor and rotor displacement monitoring in chemical plants.
• Critical pump shaft eccentricity and thrust movement sensing.
• Permanent industrial rotating machinery protection and diagnostic systems.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

Ensure proper installation for accurate machinery protection:

• Thread Engagement: Maximum recommended thread engagement is 0.563 inches (1.5 times the thread diameter) to avoid mechanical binding.
• Cable Routing: Maintain a minimum cable bend radius of 25.4 mm (1.0 inch) to preserve high-frequency signal integrity. Keep signal cables isolated from high-voltage wiring.
• Probe Gap Setpoint: Adjust probe gap using the system DC voltage calibration (typically -10 Vdc corresponding to a nominal 1.27 mm or 50 mil gap for AISI 4140 steel targets).
• Grounding: Ensure the coaxial cable shield is grounded at the Proximitor sensor or barrier terminal strip, preventing ground loops.

Compliance and Certifications

• ATEX/IECEx: Ex ia IIC T5...T1 Ga intrinsically safe for hazardous environments.
• CSA: Approved for Class I, Division 1 groups.
• Entity Parameters: Ui = -28 V, Ii = 140 mA, Pi = 0.91 W, Ci = 1.5 nF, Li = 610 uH when matched with certified Bently Nevada barriers.