Bently Nevada 3300 XL 8mm Proximity Probe 330101-00-27-10-02-05

Overview: The Sensing Element of Machinery Protection Systems

The Bently Nevada 3300 XL 8mm Proximity Probe, part number 330101-00-27-10-02-05, is the sensing probe component of the 3300 XL Proximity Transducer System, used for radial vibration and axial position measurement on fluid-film bearing machines throughout rotating equipment protection systems. As part of the interchangeable 3300 XL probe family, this probe pairs with a 3300 XL Proximitor sensor to form a complete non-contact displacement measurement system central to turbine, compressor, and pump condition monitoring.

As an authorized supplier of Bently Nevada machinery protection instrumentation, Seven Star LLC sources and supplies the 3300 XL 8mm proximity probe to refineries, gas processing plants, and power generation facilities across Oman and the wider GCC. Because probe interchangeability and correct ordering configuration are critical to maintaining an existing 3300 XL system’s calibration, Seven Star LLC helps maintenance teams confirm the exact suffix code required for their installed base.

Measurement Principle

The 3300 XL proximity transducer system generates an output voltage directly proportional to the distance between the probe tip and an observed conductive surface – typically a rotating shaft – enabling both static (position) and dynamic (vibration) measurement from the same sensing element. This eddy-current-based displacement principle allows continuous, non-contact monitoring of shaft position and radial vibration without any physical wear on the measurement point itself, a critical requirement for machinery that must run continuously between major overhauls.

The probe’s linear range extends 2 mm (80 mils) from approximately 0.25 mm to 2.3 mm (10 to 90 mils) from the target, with an incremental scale factor of 7.87 V/mm (200 mV/mil) ±5% for standard 1 or 5 meter systems, and a recommended radial vibration gap setting of -9 Vdc (approximately 1.27 mm / 50 mils). Deviation from the best-fit straight line is held to ±0.025 mm (±1 mil) for standard systems, giving the probe the precision required for both routine condition monitoring and machinery protection trip logic.

Engineering Design of the 3300 XL Probe

The 3300 XL probe and extension cable incorporate two patented design improvements over earlier probe generations: a TipLoc molding method that provides a more robust bond between the probe tip and probe body, and a CableLoc cable design that delivers 330 N (75 lbf) pull strength to more securely attach the probe cable to the probe tip. The probe tip itself is molded from polyphenylene sulfide (PPS), while the probe case is constructed from AISI 303 or 304 stainless steel, rated for an operating and storage temperature range of -52°C to +177°C (-62°F to +350°F).

This 330101 series probe is supplied with a 3/8-24 UNF thread without armor, and the -05 approval option code indicates CSA, ATEX, and IECEx hazardous-area certification, making it suitable for installation in classified areas common to refinery and gas processing rotating equipment. A miniature coaxial ClickLoc connector terminates the standard cable, ensuring reliable, repeatable connection to the mating Proximitor sensor cable.

Key Features

The Bently Nevada 3300 XL 8mm Proximity Probe delivers precise, reliable non-contact shaft measurement. Key characteristics include:

• 2 mm (80 mil) linear measuring range with ±0.025 mm deviation from best-fit straight line.
• TipLoc molded tip bond and CableLoc cable retention (330 N / 75 lbf pull strength).
• 3/8-24 UNF thread, without armor, miniature coaxial ClickLoc connector.
• PPS probe tip and AISI 303/304 stainless steel case construction.
• Operating temperature range of -52°C to +177°C.
• CSA, ATEX, and IECEx hazardous-area approvals (option -05).
• Full interchangeability with existing 3300 XL Proximitor sensor systems.

Industrial Applications

The 3300 XL 8mm proximity probe is deployed across turbines, centrifugal compressors, pumps, and other fluid-film bearing machinery in refineries, gas processing plants, and power generation facilities, providing the radial vibration and axial position data that machinery protection and condition monitoring systems depend on. Its role in Keyphasor reference and speed measurement applications also supports balancing and diagnostic analysis on critical rotating equipment.

Seven Star LLC supports refinery instrumentation teams, gas processing operators, and power plant maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Bently Nevada 3300 XL probes, helping plants maintain continuous, reliable machinery protection coverage.

Technical Specifications

The table below summarizes the core specifications of the Bently Nevada 3300 XL 8mm Proximity Probe as supplied by Seven Star LLC.

Call To Action

Seven Star LLC supplies the Bently Nevada 3300 XL 8mm Proximity Probe with full manufacturer documentation and regional technical support. Contact our instrumentation division for a formal B2B quotation, to confirm the correct probe configuration for your existing 3300 XL system, or to obtain the complete technical datasheet. Seven Star LLC ensures every unit shipped across Oman and the GCC is genuine Bently Nevada hardware, correctly specified, and backed by local support.