Introduction
The Bently Nevada 330106-05-30-50-02-05 is a 3300 XL 8 mm Reverse Mount Probe engineered for non-contact measurement of shaft vibration and position in rotating machinery. Using eddy-current proximity sensing, the probe detects changes in the gap between its sensing tip and a conductive shaft surface, providing both static position and dynamic vibration information.
This configuration features a 2.0 meter total length, an M10 × 1 mounting thread, and a Miniature ClickLoc™ coaxial connector. The reverse-mount design allows the sensing element to be installed from the rear of a machine mounting arrangement, making it especially useful where conventional probe access is restricted.
The final -05 designation identifies the multiple-approval configuration, supporting applications where additional hazardous-area certification requirements are part of the equipment specification. Combined with the 3300 XL 8 mm platform, this makes the 330106-05-30-50-02-05 a practical choice for critical machinery monitoring in power generation, oil and gas, petrochemical, and industrial processing environments.
For maintenance teams looking for a reliable replacement within an existing 3300 XL installation, this model offers a well-defined combination of extended probe length, reverse mounting flexibility, non-contact measurement, and industrial-grade construction.
Technical Specifications
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 330106-05-30-50-02-05 |
| Product Series | 3300 XL |
| Product Type | 8 mm Reverse Mount Probe |
| Sensing Technology | Eddy Current |
| Probe Diameter | 8 mm (0.31 in) |
| Mounting Thread | M10 × 1 |
| Total Length Option | 2.0 m (6.6 ft) |
| Connector | Miniature ClickLoc™ coaxial connector |
| Agency Approval Option | Multiple Approvals |
| Probe Tip Material | Polyphenylene Sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 Stainless Steel |
| Measurement Range | 2 mm (80 mils) |
| Recommended Installation Gap | 1.27 mm (50 mils) |
| Maximum Connector Torque | 0.565 N·m (5 in·lbf) |
| Mounting Configuration | Reverse Mount |
| Primary Measurement | Shaft position and vibration |
| System Family | 3300 XL Proximity Transducer System |
| Product Weight | Approximately 0.33 kg |
Applications
Turbine Monitoring
The probe can be used for shaft vibration and position measurement on steam and gas turbines. Continuous proximity measurements provide valuable information for machinery protection and condition-monitoring strategies.
Compressor Condition Monitoring
Critical compressors depend on stable rotor operation. The 330106-05-30-50-02-05 can be incorporated into proximity monitoring arrangements to track shaft movement and identify changes in machine behavior.
Pump and Motor Assemblies
Industrial pumps and motor-driven equipment can benefit from non-contact shaft monitoring, particularly when vibration information is used to support predictive maintenance and equipment reliability programs.
Generator Monitoring
In power-generation installations, proximity probes can form part of a larger monitoring system used to observe rotor movement, vibration, and shaft position.
Oil and Gas Equipment
The multiple-approval configuration makes this model particularly relevant to installations where hazardous-area certification is an important part of the instrumentation specification.
Petrochemical Machinery
Compressors, pumps, turbines, and other critical rotating assets in petrochemical facilities can use proximity measurement as part of a broader machinery protection architecture.
Large Rotating Machinery
The 2.0 meter length provides useful installation flexibility on larger machines where a shorter probe configuration may not offer sufficient reach.
Advantages
Extended 2.0 Meter Configuration
The 2.0 m total-length option gives engineers more freedom when locating the sensing point on larger machines or installations with greater separation between the probe and connected monitoring equipment.
Reverse Mounting Flexibility
Unlike conventional forward-mounted arrangements, the reverse-mount design allows installation from the opposite side of the mounting location. This can be a significant advantage when access around a bearing housing or machine casing is limited.
Accurate Non-Contact Sensing
Eddy-current technology measures shaft movement without requiring physical contact with the rotating surface. This makes the probe well suited to high-speed machinery where mechanical contact at the sensing point would be undesirable.
Proven 8 mm Platform
The 8 mm format provides a compact sensing solution for machinery monitoring while fitting into the established 3300 XL proximity monitoring ecosystem.
Robust Probe Construction
The PPS probe tip and AISI 303 or 304 stainless-steel case provide a durable mechanical construction intended for industrial service.
Secure Tip Construction
TipLoc™ technology strengthens the bond between the probe tip and probe body, supporting mechanical integrity in continuous-duty applications.
Secure Cable Attachment
CableLoc™ construction provides additional mechanical security between the probe cable and assembly, helping reduce the risk of cable separation during installation and service.
Multiple-Approval Configuration
The -05 agency approval option provides a configuration intended for applications requiring multiple certification approvals, making it a more suitable choice for certain regulated or hazardous-area installations.
Maintenance-Friendly Replacement
For facilities already using Bently Nevada 3300 XL proximity monitoring equipment, the 330106-05-30-50-02-05 can provide a convenient replacement option when the existing installation requires the same reverse-mount, 8 mm, 2.0 m configuration.
Technical FAQs
1. What is the Bently Nevada 330106-05-30-50-02-05?
It is a 3300 XL 8 mm Reverse Mount Probe designed for non-contact measurement of shaft vibration and position in rotating machinery.
2. What does the “50” in the part number represent?
The 50 identifies the 2.0 meter (6.6 ft) total-length option for this 330106 reverse-mount probe configuration.
3. What is the diameter of the probe?
The probe has an 8 mm (0.31 in) diameter.
4. What mounting thread does it use?
The 330106 series uses an M10 × 1 mounting thread.
5. Which connector is specified for this model?
The -02 configuration uses a Miniature ClickLoc™ coaxial connector.
6. What does the final “05” indicate?
The final -05 identifies the multiple-approval agency option in the 3300 XL ordering configuration.
7. What materials are used in the probe?
The sensing tip uses polyphenylene sulfide (PPS), while the probe case is made from AISI 303 or 304 stainless steel.
8. What is the recommended installation gap?
The nominal recommended installation gap is approximately 1.27 mm (50 mils) for the standard configuration.
9. What machinery can this probe monitor?
Typical applications include turbines, compressors, pumps, generators, motors, gearboxes, and other rotating machinery requiring shaft vibration or position monitoring.
10. Can this model replace another 330106 probe?
Potentially, but the complete configuration should be matched before replacement. Engineers should verify the probe diameter, mounting thread, total length, connector, certification requirements, target material, extension cable, and compatible Proximitor sensor rather than relying only on the base model number.
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