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 a trusted 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.

330101-00-27-10-02-05 Part Number Breakdown

Base number 330101 identifies a 3300 XL 8 mm probe with 3/8-24 UNF thread and no armor; the armored twin is 330102 and the M10 × 1 versions are 330103 and 330104. The five option fields follow the pattern AA-BB-CC-DD-EE. A = 00 means zero unthreaded length, so the case is threaded along its whole body. B = 27 is an overall case length of 2.7 in, chosen in 0.1 in steps between 0.8 and 9.6 in. C = 10 is a total length of 1.0 metre (3.3 ft) from probe tip to connector.

D = 02 specifies the miniature coaxial ClickLoc connector on standard cable without a factory-fitted connector protector; 01 adds the protector, while 11 and 12 are the same two choices on FluidLoc cable, which blocks oil migration through the cable interior. E = 05 is the CSA, ATEX and IECEx approval option, the alternative being 00 for non-approved use. Other total lengths in the same family are 05, 15, 20, 30, 50 and 90 (0.5, 1.5, 2.0, 3.0, 5.0 and 9.0 metres). One metre leads carry a +30%, -0% length tolerance.

System Length Matching and Compatible Components

A 1.0 metre probe can be used in three ways. Connected straight to a 1 metre 3300 XL Proximitor Sensor (330180-10 panel mount, -11 DIN mount or -12 without mounting hardware) it forms a complete 1 metre system with no extension cable. For 5 or 9 metre systems the rule is that probe length plus 330130 extension cable length must equal the sensor length, which points to the 330130-040 (4.0 metre) cable with a 330180-50, -51 or -52 sensor, or 330130-080 (8.0 metre) with a 330180-90, -91 or -92 sensor.

Extension cable 330130 is offered as standard, armored, standard with connector protector and armored with protector, plus the FluidLoc equivalents, each with approval option 00 or 05. Standard cable weighs 34 g/m and has a typical capacitance of 69.9 pF/m. Where the probe to cable joint will see turbine oil, fit connector protectors (kit 40113-02 or pack 40180-02) rather than the silicone tape supplied with each cable. Mixing in older non-XL 3300 components is permitted but limits performance to the non-XL specification.

Common 330101 Part Numbers Decoded

Buyers often search for a complete 330101 code taken from the probe label. Every 330101 code follows the same AA-BB-CC-DD-EE structure described above, so the table below decodes the codes we are most often asked about. Unthreaded and case lengths are in 0.1 inch steps, and the total length includes the integral cable up to the connector.

The -CN suffix is not one of the approval options (00 and 05) listed in Bently Nevada datasheet 141194; it is a country-specific approval variant, so it should be matched to the nameplate of the installed probe before ordering. When a probe is replaced, keep the same total length so the system still matches its 3300 XL Proximitor Sensor and extension cable. For M10 × 1 threaded machines, see the 330103 version. Send the full code from the label and the quantity, and we will quote the exact match or confirm the closest equivalent.

More 330101 Codes Decoded

These further 330101 codes are also searched often. They follow the same AA-BB-CC-DD-EE fields as the table above: unthreaded length and case length in 0.1 inch steps, total length in metres, then connector/cable and approval.

Some searched codes need a closer look. In 330101-17-28-10-02-BR the first four fields read as 1.7 in unthreaded length, 2.8 in case length, 1.0 m total length and ClickLoc connector on standard cable; -BR is not one of the datasheet approval options (00 and 05), so treat it like -CN as a country-specific variant and check the nameplate. 330101-20-45-10-02-01 ends in 01, which is also not a listed approval option. 330101-0-27-10-02-05 is the same probe as 330101-00-27-10-02-05 written with a single zero. Codes such as 330101-05-30-02-03 or 330101-05-30-05-02-03 have a field missing or added; 05-30 is the fixed geometry of the 330106 M10 reverse mount probe (330106-05-30-CC-DD-EE), so the label should be checked. The armored 3/8-24 version 330102 uses the same fields: 330102-20-47-10-02-CN is 2.0 in unthreaded, 4.7 in case, 1.0 m, and 330102-00-96-05-02-05 is a fully threaded 9.6 in case (the maximum), 0.5 m, with CSA, ATEX and IECEx approval. The metric armored 330104 uses 10 mm steps, so 330104-10-19-10-02-00 is 100 mm unthreaded, 190 mm case, 1.0 m. Send a clear photo of the probe label and we will confirm the part number before quoting.

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 datasheet 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 supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

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