Introduction
The Bently Nevada 330105-02-15-05-02-02 is a 3300 XL 8 mm Reverse-Mounted Probe developed for non-contact measurement of shaft vibration, radial position, and dynamic movement on critical rotating machinery. Its reverse-mounted construction provides additional installation flexibility where access to the sensing point is limited or where the probe must be installed from inside the machine housing outward.
This configuration combines a 3/8-24 UNF mounting thread, 0.2-inch unthreaded section, 150 mm case-length configuration, and a 0.5-meter total probe cable length. The probe uses a Miniature ClickLoc coaxial connector and is intended to work as part of a properly configured 3300 XL 8 mm proximity transducer system.
The compact probe geometry makes this model a practical choice for turbine, compressor, generator, pump, and other rotating-equipment applications. For maintenance teams replacing an existing probe, matching the complete part number is particularly important because the 3300 XL family includes different case lengths, cable lengths, connector arrangements, and approval configurations.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330105-02-15-05-02-02 |
| Product Family | 3300 XL |
| Product Type | 8 mm Reverse-Mounted Probe |
| Measurement Principle | Eddy-current proximity measurement |
| Mounting Style | Reverse Mount |
| Mounting Thread | 3/8-24 UNF |
| Unthreaded Length | 0.2 in / 5.0 mm |
| Case Length | 150 mm / 5.9 in |
| Total Cable Length | 0.5 m / 1.6 ft |
| Cable Length Option | 05 |
| Connector Option | 02 |
| Connector Type | Miniature ClickLoc coaxial connector |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303/304 stainless steel |
| Probe Diameter | 8 mm |
| Typical Application | Shaft vibration and position monitoring |
| System | 3300 XL 8 mm Proximity Transducer System |
Applications
Steam Turbine Monitoring
The probe is well suited to turbine bearing and shaft-monitoring applications where continuous observation of shaft movement is important. Its reverse-mounted configuration can simplify installation in locations where access from the conventional direction is restricted.
Gas Turbine Equipment
Gas turbine shafts operate under demanding mechanical conditions. A properly installed 3300 XL proximity probe can provide continuous information about shaft position and vibration for machinery monitoring and protection functions.
Compressor Systems
Large compressors frequently have limited space around bearing housings. The reverse-mounted body provides an alternative installation orientation that can be advantageous in confined machine structures.
Generator Shaft Monitoring
Generator shafts can experience changes in vibration and position caused by mechanical imbalance, alignment changes, bearing conditions, or operating conditions. The probe can form part of a continuous proximity-monitoring arrangement.
Pumps and Motors
Critical pumps, motors, fans, and other rotating assets can use non-contact proximity measurement for condition monitoring. The compact configuration is useful where the available probe installation space is restricted.
Fluid-Film Bearing Machinery
Proximity probes are particularly valuable on machines equipped with fluid-film bearings because shaft displacement relative to the bearing structure can be monitored continuously.
Machinery Protection
When combined with a compatible Proximitor Sensor and the appropriate system configuration, the probe can provide the input required for machinery vibration and position protection functions.
Maintenance and Replacement Projects
The 330105-02-15-05-02-02 is also relevant to maintenance inventories where an existing reverse-mounted probe must be replaced with a mechanically compatible configuration. Matching the complete ordering number helps avoid problems caused by differences in cable length, case dimensions, or connector configuration.
Advantages
Reverse-Mount Design
The main mechanical advantage is the reverse-mount arrangement. It allows engineers to approach the sensing location from the opposite side of the machine mounting point, which can be extremely useful in compact bearing housings.
150 mm Case Configuration
The 150 mm case-length option provides a longer mechanical configuration than many commonly encountered 330105 models. This can be useful when the available mounting depth or installation geometry calls for a longer probe body.
Compact 0.5-Meter Cable
The 0.5-meter cable provides approximately 1.6 feet of connection length. It is a practical option for installations where the Proximitor Sensor or associated connection point is located relatively close to the probe.
Miniature ClickLoc Connector
The Miniature ClickLoc coaxial connector provides a purpose-designed interface for compatible 3300 XL system components. Its compact form is beneficial in crowded instrumentation installations.
Non-Contact Measurement
The eddy-current operating principle allows the probe to measure shaft movement without physical contact. This eliminates mechanical probe-to-shaft wear and makes the technology well suited to high-speed rotating equipment.
Robust Industrial Construction
The probe tip uses PPS material and the probe case uses stainless steel construction, providing a durable assembly for industrial machinery environments.
Flexible Installation
Combining the reverse-mount configuration with the longer case arrangement gives maintenance and installation engineers additional flexibility when dealing with restricted access or unusual bearing-housing geometry.
Suitable for Continuous Monitoring
The probe is designed to operate as part of a continuous proximity-monitoring system, allowing machinery operators to track shaft behavior rather than relying solely on periodic manual inspections.
Easy System Integration
When the complete system is correctly configured, the probe can be integrated with compatible 3300 XL extension-cable and Proximitor components to create a complete shaft-monitoring measurement chain.
Technical FAQs
1. What is the Bently Nevada 330105-02-15-05-02-02?
It is a 3300 XL 8 mm Reverse-Mounted Probe designed for non-contact monitoring of shaft position and vibration on rotating machinery.
2. What does the 330105 model number identify?
The 330105 base number identifies the 3300 XL 8 mm Reverse Mount Probe family using a 3/8-24 UNF mounting thread.
3. What does the first “02” represent?
The first 02 identifies the 0.2-inch unthreaded section, approximately 5 mm.
4. What does the “15” represent?
The 15 identifies the 150 mm case-length configuration, approximately 5.9 inches.
5. How long is the cable?
The 05 total-length option identifies a 0.5-meter cable, equivalent to approximately 1.6 feet.
6. What connector does this probe use?
The 02 connector option identifies the Miniature ClickLoc coaxial connector.
7. Is this a standard forward-mounted probe?
No. The 330105 is specifically a reverse-mounted probe. It is intended for installation arrangements where the probe approaches the target from the reverse side of the machine mounting structure.
8. What is the probe tip diameter?
The 3300 XL 8 mm configuration uses an 8.0 mm probe tip, approximately 0.31 inch in diameter.
9. What materials are used?
The probe tip uses polyphenylene sulfide (PPS), while the probe case is constructed from AISI 303/304 stainless steel.
10. Can it replace another 330105 probe with a different case length?
Not automatically. Although probes may share the same 330105 family designation, differences in case length, total cable length, connector type, and approval configuration can affect installation compatibility. The complete part number should be matched before replacement.
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