Introduction
The Bently Nevada 330106-05-30-05-02-05 is a 3300 XL 8 mm Reverse Mount Probe developed for non-contact measurement of shaft position and vibration in rotating machinery. Its reverse-mount construction is particularly useful where the available mechanical arrangement requires the probe to be installed from the rear of a mounting surface or bearing housing.
This configuration combines a 0.5-meter cable, Miniature ClickLoc coaxial connector, and a multiple-approval option. The probe uses the 3300 XL 8 mm eddy-current proximity measurement principle, allowing machinery operators to monitor shaft movement without direct contact between the sensing tip and rotating target.
For turbine, compressor, generator, pump, and other critical rotating-equipment applications, the 330106-05-30-05-02-05 provides a compact sensing package with a short armored cable arrangement and connector protection. Its combination of reverse installation flexibility and multi-approval capability makes it a practical option for demanding industrial monitoring projects.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model | 330106-05-30-05-02-05 |
| Product Family | 3300 XL |
| Product Type | 8 mm Reverse Mount Probe |
| Measurement Technology | Eddy-current proximity sensing |
| Mounting Style | Reverse Mount |
| Probe Diameter | 8 mm |
| Thread Size | M10 × 1 |
| Unthreaded Length Option | 05 – 0.5 in |
| Case Length Option | 30 – 3.0 in |
| Cable Length | 0.5 m / 1.6 ft |
| Cable Length Option | 05 |
| Connector Option | 02 |
| Connector Type | Miniature ClickLoc coaxial connector |
| Armor / Approval Option | 05 |
| Approval Configuration | Multiple approvals |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 303 or 304 stainless steel |
| Pressure Seal | Viton O-ring |
| Measurement Range | Approx. 2 mm / 80 mils |
| Recommended Installation Gap | Approx. 1.27 mm / 50 mils |
| Approx. Probe Weight | 0.323–0.33 kg |
| Typical Application | Shaft vibration and position monitoring |
Applications
Turbine Shaft Monitoring
The probe can be installed on steam and gas turbine machinery where continuous shaft vibration and position information is required. The reverse-mount arrangement is valuable when access to the shaft target is constrained by the bearing housing.
Compressor Condition Monitoring
Compressors often have crowded mechanical structures around their bearings. The 330106 reverse-mount design provides an alternative probe orientation that can simplify difficult installation points.
Generator Monitoring
Generator rotors can be monitored for shaft movement, vibration, and position changes. When integrated with compatible 3300 XL monitoring hardware, the probe becomes part of a continuous machinery-condition measurement channel.
Fluid-Film Bearing Machines
The probe is particularly suitable for applications involving fluid-film bearings, where shaft displacement relative to the stationary bearing structure is an important operating parameter.
Pumps and Motors
Critical pumps, motors, fans, and other rotating equipment can use proximity sensing to observe shaft behavior continuously. The non-contact measurement principle is well suited to high-speed rotating machinery.
Axial and Radial Measurement
Depending on the mechanical arrangement and system configuration, proximity probes can be used for radial shaft vibration, axial-position measurements, and other machinery-protection functions.
Keyphasor and Speed-Related Measurements
Properly configured proximity systems can also support keyphasor or rotational-speed measurement applications where the probe installation and target geometry meet the requirements of the monitoring system.
Machinery Protection Systems
The probe can form part of a complete proximity transducer chain with compatible extension cables and Proximitor Sensors. This makes it suitable for machinery protection systems where fast identification of abnormal shaft behavior is important.
Industrial Retrofit Projects
The 330106-05-30-05-02-05 is also a useful replacement option for existing installations that require the specific M10 × 1 reverse-mount configuration, 0.5-meter cable, ClickLoc connector, and multiple-approval option.
Advantages
Reverse-Mount Installation Freedom
The reverse-mount geometry allows the sensing element to be positioned from the rear of the mounting structure. This can be a major advantage where a conventional forward-mounted probe cannot be installed without interfering with surrounding components.
Short, Practical Cable
The 0.5-meter cable keeps the installation compact and is particularly useful when the probe connection point is located close to the associated extension cable or monitoring electronics.
Miniature ClickLoc Connection
The 02 connector configuration provides a Miniature ClickLoc coaxial interface, supporting a compact connection arrangement for the 3300 XL proximity system.
Multiple Approval Configuration
The final 05 provides the multiple-approval configuration, making this version more suitable for installations where the applicable agency approvals are part of the equipment specification.
Armored Cable Protection
The 05 configuration is associated with a stainless-steel armor arrangement and connector protection. This gives the cable assembly additional mechanical protection in demanding industrial environments.
Non-Contact Measurement
Eddy-current technology allows the probe to measure shaft movement without physical contact. This avoids direct rubbing or mechanical wear between the probe tip and the rotating shaft.
Robust Materials
The PPS sensing tip and AISI 303/304 stainless-steel case provide a durable construction for industrial machinery service. The probe also incorporates a Viton O-ring pressure-sealing arrangement.
Defined Installation Gap
A recommended installation gap of approximately 1.27 mm (50 mils) provides a useful reference for system setup when the shaft target and calibration requirements correspond to the standard configuration.
Compact Mechanical Package
With an 8 mm sensing format and 0.5-meter cable, the probe offers a relatively compact solution for machinery-monitoring locations where space and cable routing are both important.
Suitable for Critical Machinery
The combination of reverse mounting, non-contact measurement, durable construction, and multiple approvals makes the probe an attractive choice for professional machinery-protection installations.
Technical FAQs
1. What is the Bently Nevada 330106-05-30-05-02-05?
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 is the cable length?
The 05 cable option specifies a 0.5-meter (1.6-foot) total cable length.
3. What connector does the probe use?
The 02 configuration uses a Miniature ClickLoc coaxial connector.
4. What does the final 05 mean?
The final 05 identifies the multiple-approval configuration. It should not be treated as equivalent to the 00 or CN variants without checking the installation requirements.
5. What mounting thread is used?
Available specifications identify the mechanical configuration as M10 × 1.
6. What is the recommended installation gap?
A commonly listed installation gap for this configuration is approximately 1.27 mm (50 mils). Actual installation should follow the applicable system documentation and machinery-specific requirements.
7. What materials are used in the probe?
The probe tip is specified as polyphenylene sulfide (PPS), while the probe case uses AISI 303 or 304 stainless steel.
8. What is the approximate weight?
The listed probe weight is approximately 0.323–0.33 kg. Supplier-reported packed dimensions and shipping information may differ, so logistics weight should not be confused with the installed probe weight.
9. Is the probe suitable for fluid-film bearing machines?
Yes. The 3300 XL 8 mm proximity platform is commonly used for monitoring shaft movement on machinery equipped with fluid-film bearings, provided the probe installation and complete transducer system are correctly engineered.
10. Can it be replaced with another 330106 probe?
Not automatically. The unthreaded length, case length, cable length, connector, armor configuration, and agency approval must all be considered. A probe with the same 8 mm designation can still have different mechanical or certification characteristics.
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