Introduction
The Bently Nevada 330105-02-12-15-02-05 is a 3300 XL 8 mm Reverse Mount Probe engineered for non-contact measurement of shaft vibration and position in rotating machinery. Its reverse-mount design is particularly valuable when the available installation space or machine geometry requires the probe to be installed from the reverse side of the mounting arrangement.
This configuration uses the 330105 reverse-mount probe body with 3/8-24 UNF threads, a 0.2-inch unthreaded section, a 1.2-inch case length, and a 1.5-meter integral cable. It is fitted with a miniature coaxial ClickLoc connector and carries the 05 agency approval configuration associated with CSA, ATEX, and IECEx approvals.
As part of a compatible 3300 XL proximity transducer system, the probe works with the appropriate extension cable and Proximitor Sensor to detect minute changes in the distance between the probe tip and conductive shaft target. This makes it a practical choice for turbines, compressors, pumps, motors, generators, and other critical rotating assets where reliable shaft-position and vibration monitoring is essential.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330105-02-12-15-02-05 |
| Product Family | 3300 XL |
| Product Type | 8 mm Reverse Mount Probe |
| Probe Series | 330105 |
| Measurement Type | Non-contact eddy-current proximity measurement |
| Thread | 3/8-24 UNF |
| Unthreaded Length | 0.2 in |
| Case Length | 1.2 in |
| Integral Cable Length | 1.5 m (4.9 ft) |
| Cable Option | 15 |
| Connector | Miniature ClickLoc coaxial connector |
| Connector Option | 02 |
| Agency Approval | 05 |
| Approvals | CSA, ATEX, IECEx |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303/304 stainless steel |
| Probe Diameter | 8 mm sensing system |
| Typical Probe Weight | Approx. 0.323 kg |
| Typical Shipping Weight | Approx. 1.5 kg |
| Typical Application | Shaft vibration and position monitoring |
| Installation Style | Reverse mount |
Applications
Steam Turbine Monitoring
The reverse-mount configuration is well suited to turbine installations where conventional front-mounted probe arrangements are difficult to accommodate. It can provide non-contact shaft vibration and position measurement while taking advantage of an alternative mounting orientation.
Gas Turbine Machinery
Gas turbine bearing and shaft-monitoring systems can require carefully positioned proximity probes. The 330105 reverse-mount design provides an option for installations where access from the reverse side is preferable.
Compressor Monitoring
Large compressors often have limited space around bearing housings. A reverse-mounted proximity probe can simplify mechanical integration while providing the required shaft displacement measurement for compatible 3300 XL monitoring systems.
Generator Applications
The probe can be incorporated into generator monitoring arrangements where shaft vibration or position needs to be continuously observed. Its 8 mm proximity technology is intended for precise non-contact measurement of conductive rotating targets.
Pumps and Motors
Critical pumps and motors can use proximity measurement to monitor shaft behavior, helping identify changes associated with imbalance, misalignment, mechanical looseness, or bearing-related problems.
Fluid-Film Bearing Machinery
The 3300 XL 8 mm proximity platform is particularly relevant to fluid-film bearing machines, where shaft position and dynamic movement are important indicators of machine condition.
Keyphasor and Speed-Related Measurement
Compatible 3300 XL proximity systems can also be used in applications requiring a shaft reference or rotational-speed-related signal, provided the complete probe, sensor, and installation configuration is appropriately engineered.
Maintenance and Retrofit Projects
For an existing 3300 XL installation requiring a 330105 reverse-mount probe with 1.5 m cable, ClickLoc connector, and 05 approval configuration, this model provides a precise replacement option without changing the basic probe architecture.
Advantages
Reverse-Mount Installation Flexibility
The principal advantage of the 330105 series is its reverse-mount design. This allows the probe to be installed from the reverse side of an appropriate mounting arrangement, which can solve difficult mechanical-access problems on large rotating machinery.
8 mm Proximity Technology
The 8 mm sensing platform provides a practical balance of measurement capability and mechanical robustness for industrial rotating equipment. It is widely suited to shaft vibration and position monitoring applications.
1.5-Meter Integral Cable
The 1.5-meter cable offers approximately 4.9 feet of connection length, giving installers useful flexibility between the probe location and the next component in the proximity measurement chain.
Miniature ClickLoc Connector
The 02 configuration uses a miniature coaxial ClickLoc connector, providing a defined connection interface for compatible 3300 XL extension components.
Stainless Steel Probe Case
The probe case uses AISI 303 or 304 stainless steel, providing a durable mechanical housing suitable for industrial machinery environments.
PPS Probe Tip
The probe tip is specified as polyphenylene sulfide (PPS). This material supports the probe's robust construction and stable operation in demanding industrial applications.
Multiple Agency Approvals
The final 05 approval option corresponds to CSA, ATEX, and IECEx approvals, making this configuration suitable for applicable installations where these certification requirements must be addressed.
Non-Contact Measurement
Because the probe operates on the eddy-current proximity principle, the sensing element can monitor shaft movement without physical contact with the rotating surface. This makes the technology particularly useful for continuous machinery protection.
Purpose-Built 3300 XL Integration
The 330105 is not a generic displacement sensor. It is part of the 3300 XL proximity transducer platform and is intended to operate with the appropriate system components, helping maintain a properly matched measurement chain.
Technical FAQs
1. What is the Bently Nevada 330105-02-12-15-02-05?
It is a 3300 XL 8 mm Reverse Mount Probe with 3/8-24 UNF threads, a 0.2-inch unthreaded section, 1.2-inch case length, 1.5-meter cable, miniature ClickLoc connector, and CSA/ATEX/IECEx approval configuration.
2. What does “330105” identify?
The 330105 base model identifies the 3300 XL 8 mm Reverse Mount Probe with 3/8-24 UNF threads. The 3300 XL documentation lists 330105 as the reverse-mount probe family.
3. What does the first “02” mean?
The first 02 identifies the 0.2-inch unthreaded length, equivalent to approximately 5.08 mm.
4. What does “12” mean?
The 12 specifies a 1.2-inch case length, equivalent to approximately 30.48 mm.
5. How long is the integral cable?
The 15 cable option specifies a 1.5-meter (4.9-foot) total cable length.
6. What connector does this probe use?
The second 02 identifies a miniature ClickLoc coaxial connector.
7. What does the final “05” indicate?
The final 05 identifies the agency approval configuration associated with CSA, ATEX, and IECEx approvals.
8. What materials are used in the probe?
The probe tip is specified as polyphenylene sulfide (PPS), while the probe case is made from AISI 303 or 304 stainless steel.
9. What is the probe weight?
The listed probe weight is approximately 0.323 kg, while shipping weight is approximately 1.5 kg. Shipping weight includes packaging and should not be treated as the actual probe assembly weight.
10. When should a reverse-mount probe be selected instead of a standard probe?
A reverse-mount probe is most useful when the mechanical arrangement requires the probe to be installed from the rear or when conventional front mounting creates access, clearance, or protection problems. The correct probe should always be selected according to the machine's mounting geometry, thread specification, cable length, connector configuration, and certification requirements.
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