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

Overview: The Sensing Element of a Proven Vibration Monitoring Standard

The Bently Nevada 3300 XL 8mm Proximity Probe, part number 330101-00-27-10-02-05, is the sensing component of the 3300 XL Proximity Transducer System, an industry-standard platform for continuous vibration and position monitoring on fluid-film bearing machines such as turbines, compressors, and generators. Working together with a matching 3300 XL extension cable and Proximitor sensor, this 8mm probe delivers an output voltage directly proportional to the distance between the probe tip and the observed conductive shaft surface, supporting both static (position) and dynamic (vibration) measurement.

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, cable, and Proximitor sensor length and configuration must be matched for correct system calibration, Seven Star LLC helps engineering teams confirm the correct part number combination for their existing or new machinery protection system.

Measurement Principle

The 3300 XL probe operates on the eddy current principle: a radio-frequency signal generated by the Proximitor sensor is transmitted down the probe’s coaxial cable to a coil in the probe tip, creating a high-frequency electromagnetic field. When a conductive target – typically the machine shaft – enters this field, eddy currents are induced in the target surface, which in turn draw energy from the probe’s field in proportion to the gap distance between the probe tip and the target. The Proximitor sensor demodulates this energy loss into a DC output voltage that varies linearly with gap distance across the probe’s rated linear range.

This non-contact measurement approach allows continuous monitoring of both the static radial position of a rotating shaft within its bearing clearance and the dynamic vibration displacement of that shaft, without any physical wear on the sensing element itself. All 3300 Proximity Transducer Systems are engineered for complete interchangeability of probe, extension cable, and Proximitor sensor within a matched length combination, eliminating the need for individual component matching or bench calibration when replacing a probe in the field.

Engineering Design of the 3300 XL Probe

The 330101 series probe features a patented TipLoc molding method that provides a more robust bond between the probe tip and probe body compared to earlier probe designs, and a patented CableLoc cable termination design delivering 330 N (75 lbf) of pull strength to securely retain the probe cable and tip under field handling and vibration. The probe tip is molded from polyphenylene sulfide (PPS), while the probe case is constructed from AISI 303 or 304 stainless steel, giving the probe the chemical and thermal resistance needed for demanding process environments.

Rated for an operating and storage temperature range of -52°C to +177°C (-62°F to +350°F), the probe delivers a 2 mm (80 mil) linear range from approximately 0.25 mm to 2.3 mm (10 to 90 mils) from the target, with a recommended radial vibration gap setting of -9 Vdc (approximately 1.27 mm / 50 mils). The -05 suffix on this part number indicates CSA, ATEX, and IECEx hazardous-area approvals, extending the probe’s application to classified areas in refineries and offshore facilities.

Key Features

The Bently Nevada 3300 XL 8mm Proximity Probe delivers proven, interchangeable machinery protection sensing. Key characteristics include:

• Eddy current sensing principle providing non-contact position and vibration measurement.
• Patented TipLoc molding and CableLoc cable termination for robust field durability.
• 2 mm (80 mil) linear range with 7.87 V/mm (200 mV/mil) incremental scale factor, standard 1/5 m system.
• Operating and storage temperature range of -52°C to +177°C.
• CSA, ATEX, and IECEx approvals for hazardous-area installation (per -05 suffix).
• Complete interchangeability with matched-length 3300 XL extension cables and Proximitor sensors.
• PPS probe tip material with AISI 303/304 stainless steel case construction.

Industrial Applications

The 3300 XL 8mm proximity probe is deployed on fluid-film bearing machines across refineries, gas processing plants, and power generation facilities, including steam and gas turbines, centrifugal compressors, and large generators, where continuous radial vibration and shaft position monitoring is essential to detecting bearing wear, misalignment, or rotor instability before a failure occurs. It is also used for Keyphasor reference and speed measurement applications supporting the broader machinery protection system.

Seven Star LLC supports refinery instrumentation teams, power generation engineers, and rotating equipment maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Bently Nevada 3300 XL proximity 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 matched probe, cable, and Proximitor sensor combination for your machinery protection 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.