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.

Decoding the 330101-00-27-10-02-05 Ordering Code

Every field in a 330101 part number is an ordering option, and one wrong digit produces a probe that fits mechanically but will not hold the system’s calibrated scale factor. For the Bently Nevada 3300 XL 8mm Proximity Probe 330101-00-27-10-02-05 the fields resolve as follows: 330101 identifies the 3300 XL 8 mm non-armored probe with 3/8-24 UNF thread; option A, 00, sets an unthreaded length of 0.0 in (ordered in 0.1 in increments to a maximum of 8.8 in); option B, 27, sets a case length of 2.7 in (ordered in 0.1 in increments across a 0.8 in to 9.6 in range); option C, 10, sets a total probe length of 1.0 metre; option D, 02, specifies the ClickLoc connector with standard cable and no connector protector; option E, 05, applies the CSA, ATEX and IECEx approvals.

Total length is the field most often mis-ordered. Baker Hughes publishes total length codes 05, 10, 15, 20, 30, 50 and 90 – 0.5, 1.0, 1.5, 2.0, 3.0, 5.0 and 9.0 metres respectively – and this part number carries the 10 code, making it the 1.0 metre probe rather than the 5.0 metre 330101-00-27-50-02-05. That distinction is not cosmetic: a 3300 XL system is calibrated at a fixed total length of 5 or 9 metres including extension cable, or 1 metre for probe-only systems, and the datasheet instruction is explicit – extension cable length plus probe length must equal the Proximitor sensor total length. A 1.0 metre probe is therefore paired with a 4.0 metre extension cable for a 5 metre system, or used alone against a Proximitor sensor calibrated for 1 metre.

Target and Connector Requirements

Baker Hughes specifies a minimum target size of 15.2 mm (0.6 in) diameter for a flat target; a shaft narrower than this will distort the eddy-current field and shift measured gap voltage off the calibrated curve. Frequency response is 0 to 10 kHz, +0/-3 dB, and probe weight is approximately 323 g per metre. The gold-plated ClickLoc connector is made up finger tight – it audibly clicks when seated – and needs no special tools.

Request a Quote for Bently Nevada 3300 XL 8mm Proximity Probe 330101-00-27-10-02-05

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.

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