Description

The Bently Nevada 330101-00-28-05-02-00 is an 8 mm unarmored proximity probe belonging to the industry-standard 3300 XL 8 mm Proximity Transducer System. This high-precision eddy-current sensor is engineered for non-contact vibration and shaft position measurements in high-vibration rotating machinery, including steam turbines, gas turbines, compressors, pumps, and generator systems.

This specific configuration is built with a fully threaded 3/8-24 UNF steel body (0.0 in unthreaded length) and features an overall case length of 2.8 inches. It is equipped with a short total probe length of 0.5 meters (1.6 feet) terminated in a gold-plated miniature coaxial ClickLoc connector on a standard FEP-insulated coaxial cable. Because it is designed without armor and does not require hazardous area approvals, this SKU serves as a cost-effective choice for general industrial installations where existing conduits provide physical protection.

The probe operates on the eddy-current principle, projecting an electromagnetic field into a target metal shaft (such as AISI 4140 steel). Any change in physical gap modifies the field, generating a highly accurate displacement signal that compatible Proximitor 330180 sensors convert to standard voltage outputs. These signals are typically integrated into Bently Nevada 3500 rack modules or machinery protection monitors to maintain constant oversight of asset health and trigger automatic safety shutdowns when vibration limits are exceeded.

Features

• Fully Threaded Body: 0.0 in unthreaded length provides maximum structural versatility for direct bearing housing or bracket mounting.
• 2.8-Inch Case Length: Compact case size optimized for tight-clearance mounting environments.
• FEP-Insulated Cable: Triaxial 75 ohm cable insulated with fluoroethylene propylene (FEP), offering excellent chemical resistance and durability in warm, oil-rich environments.
• ClickLoc Coaxial Connector: Gold-plated "click" type connector provides positive physical engagement and maximum signal transfer without special tools.
• 0.5-Meter Total Length: Compact probe lead length designed to integrate into 5-meter or 9-meter overall transducer systems via standard Bently Nevada extension cables.
• Rugged Sensor Construction: Features a high-integrity polyphenylene sulfide (PPS) tip molded onto a corrosion-resistant AISI 303/304 stainless steel case.

Applications

• Shaft dynamic vibration monitoring in high-speed industrial turbines
• Rotor axial position and thermal growth displacement measurements in critical machinery
• Thrust bearing wear and rotor position tracking in pumps and centrifugal compressors
• Permanent machinery protection and condition monitoring chains on rotating assets
• Bearing oil film clearance and structural vibration analysis

Ordering Information

The Bently Nevada 3300 XL 8 mm Proximity Probe ordering code is structured as Part Number-AA-BB-CC-DD-EE. The specific options selected for this SKU are decoded below:

Technical Specifications

Installation Guidelines

For correct performance and longevity of the 3300 XL 8 mm Proximity Probe, the following installation guidelines must be followed:

• Thread Engagement: The maximum recommended thread engagement is 0.563 in (14.3 mm). Avoid exceeding this limit during mounting to prevent mechanical binding.
• Probe Case Torque: Tighten the probe case to a recommended initial torque of 11.2 N-m (100 in-lbf), with a maximum rated limit of 33.9 N-m (300 in-lbf).
• Connector Care: Finger-tighten the gold ClickLoc connectors. Do not use pliers or other metal tools on gold-to-gold connections. Maintain a minimum cable bend radius of 25.4 mm (1.0 in) along the run.
• Cable Routing: Ensure that the coaxial cable is properly secured, shielded, and grounded following industrial machinery monitoring standards to prevent electrical noise from corrupting measurement signals.