Introduction
The Bently Nevada 330105-02-12-15-02-CN is a 3300 XL 8 mm Reverse Mount Probe designed for non-contact measurement of shaft vibration and position on critical rotating machinery. Its reverse-mount configuration provides valuable installation flexibility where a conventional front-mounted probe is restricted by bearing-housing geometry, machine access, or limited clearance.
This configuration combines a 3/8-24 UNF threaded reverse-mount design, 0.2-inch unthreaded section, 1.2-inch case length, and 1.5-meter integral cable. It uses a miniature coaxial ClickLoc connector and the CN agency-approval configuration, which is associated with ATEX/IECEx and Chinese NEPSI hazardous-area marking.
As part of a properly matched 3300 XL proximity transducer system, the probe works with the corresponding extension cable and Proximitor Sensor to provide non-contact measurement of shaft movement. The result is a practical monitoring solution for turbines, compressors, generators, pumps, motors, and other rotating equipment where dependable vibration and position data are essential.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330105-02-12-15-02-CN |
| Product Family | 3300 XL |
| Product Type | 8 mm Reverse Mount Probe |
| Measurement Principle | Eddy-current proximity measurement |
| Mounting Type | Reverse Mount |
| Thread | 3/8-24 UNF |
| Unthreaded Length | 0.2 in (5.08 mm) |
| Case Length | 1.2 in (30.48 mm) |
| Integral Cable Length | 1.5 m (4.9 ft) |
| Cable Option | 15 |
| Connector | Miniature coaxial ClickLoc connector |
| Connector Option | 02 |
| Approval Option | CN |
| Hazardous-Area Marking | ATEX/IECEx and Chinese NEPSI configuration |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303/304 stainless steel |
| Typical Probe Weight | Approx. 0.323 kg |
| Typical Shipping Weight | Approx. 2 kg |
| Typical Application | Shaft vibration and position monitoring |
| Installation Style | Reverse Mount |
Applications
Steam Turbine Monitoring
The reverse-mount design is useful on steam turbines where the available mounting geometry makes conventional probe installation inconvenient. The probe can monitor shaft movement without contacting the rotating surface.
Gas Turbine Monitoring
Gas turbines demand reliable vibration and shaft-position information for critical rotating components. The 330105 reverse-mount architecture provides an alternative installation arrangement when access to the machine from the rear is preferable.
Compressor Applications
Large compressors frequently have limited space around bearing housings. A reverse-mounted 8 mm probe can provide a clean mechanical solution while maintaining the proximity measurement required by the 3300 XL system.
Generator Shaft Monitoring
The probe can be integrated into compatible generator monitoring systems to observe shaft vibration and position. Its non-contact measurement principle is well suited to continuously rotating shafts.
Pumps and Motors
Critical pumps and motors can use proximity measurement to detect changes in shaft behavior associated with imbalance, misalignment, mechanical looseness, and other developing mechanical conditions.
Hazardous-Area Machinery
The CN approval configuration makes this model particularly relevant to projects where the specified installation requires the corresponding ATEX/IECEx and Chinese NEPSI hazardous-area marking. The certification requirement should always be verified against the actual project documentation before installation.
Oil & Gas Equipment
Compressors, turbines, pumps, and other rotating equipment in oil and gas facilities can benefit from continuous shaft monitoring. The reverse-mount configuration can also simplify installation in restricted machine areas.
Retrofit and Replacement Projects
For an existing 3300 XL system requiring the exact 330105-02-12-15-02-CN configuration, using the complete part number helps maintain the original mounting geometry, cable length, connector type, and approval arrangement.
Advantages
Reverse-Mount Installation
The defining feature of the 330105 series is its reverse-mount architecture. Instead of requiring conventional front-side installation, the probe can be positioned from the reverse side of a compatible mounting arrangement, offering additional flexibility in crowded machinery areas.
8 mm Proximity Measurement
The 8 mm sensing platform is well suited to critical rotating machinery where shaft vibration and position must be monitored continuously. The non-contact approach avoids physical contact between the sensing element and rotating shaft.
1.5-Meter Integral Cable
The 1.5-meter cable provides approximately 4.9 feet of connection reach. This is a useful middle-ground configuration for installations where a short cable is insufficient but very long cable routing is unnecessary.
Miniature ClickLoc Connector
The 02 configuration uses a miniature coaxial ClickLoc connector, providing a defined connection interface for compatible 3300 XL extension cables and helping maintain a secure connection during machinery operation.
Stainless Steel Housing
The probe housing is specified with AISI 303/304 stainless steel construction, providing a durable mechanical enclosure for demanding industrial environments.
Robust Probe Tip
The 3300 XL probe design incorporates a PPS probe tip and TipLoc molding technology, supporting a strong connection between the sensing tip and probe body.
Hazardous-Area Certification Option
The CN suffix is a major selection advantage when the project calls for the corresponding Chinese and international hazardous-area approval arrangement. The CN configuration is listed with ATEX/IECEx and Chinese NEPSI marking.
Practical Replacement Configuration
Because the part number clearly defines the mechanical dimensions, cable length, connector, and approval option, the 330105-02-12-15-02-CN can be specified with confidence when an existing installation requires the same configuration.
Designed for Complete 3300 XL Systems
The probe is intended to operate as part of a complete proximity measurement chain rather than as a standalone sensor. When correctly matched with the extension cable and Proximitor Sensor, it supports reliable machinery monitoring.
Technical FAQs
1. What is the Bently Nevada 330105-02-12-15-02-CN?
It is a 3300 XL 8 mm Reverse Mount Probe with a 3/8-24 UNF thread, 0.2-inch unthreaded section, 1.2-inch case, 1.5-meter cable, miniature ClickLoc connector, and CN approval configuration.
2. What does 330105 identify?
The 330105 base number identifies the 3300 XL 8 mm Reverse Mount Probe family. It is designed for installations where reverse mounting is required.
3. What does the first “02” mean?
The first 02 specifies the 0.2-inch unthreaded section, equivalent to approximately 5.08 mm.
4. What does “12” represent?
The 12 identifies the 1.2-inch case length, equivalent to approximately 30.48 mm.
5. How long is the integral cable?
The 15 option identifies a 1.5-meter cable, approximately 4.9 feet long.
6. What connector does the probe use?
The second 02 specifies a miniature coaxial ClickLoc connector.
7. What does “CN” mean?
The final CN identifies the country-specific agency approval configuration. Product ordering information associates this configuration with ATEX/IECEx and Chinese NEPSI hazardous-area marking.
8. Is the 330105-02-12-15-02-CN a standard front-mount probe?
No. It is specifically a reverse-mount probe. Its mechanical installation arrangement differs from conventional front-mount 3300 XL 8 mm probes.
9. What is the approximate weight?
The probe weight is approximately 323 g. Some supplier listings show a shipping weight around 2 kg, which includes packaging and should not be confused with the actual probe weight.
10. What should be checked before replacing another 330105 probe with this model?
Verify the 3/8-24 UNF mounting thread, 0.2-inch unthreaded length, 1.2-inch case length, 1.5-meter cable, ClickLoc connector, and CN approval configuration. These details determine whether the replacement is mechanically, electrically, and certification-wise appropriate for the existing installation.
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