Introduction
The Bently Nevada 330704-00-050-10-01-05 is a 3300 XL 11 mm proximity probe designed for dependable, non-contact measurement of shaft displacement and vibration in critical rotating machinery. This metric configuration combines a compact 50 mm overall case length, 1.0 m integral cable, armored construction, and a protected ClickLoc connection.
The probe belongs to the 3300 XL 11 mm family, which is intended for applications requiring a larger sensing range than conventional 8 mm proximity systems. Its eddy-current sensing principle enables continuous monitoring without physical contact between the probe and rotating shaft.
This particular configuration is especially attractive for replacement projects where the machinery already uses a 50 mm case length and 1 m cable. The complete part number should be matched carefully because cable length, connector configuration, case length, and approval options can all affect installation compatibility.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330704-00-050-10-01-05 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Configuration | Metric |
| Probe Model | 330704 |
| Probe Diameter | 11 mm |
| Mounting Thread | M14 x 1.5 |
| Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 50 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Connector Protector | Included |
| Cable Type | Standard cable |
| Measurement Principle | Non-contact eddy-current |
| Nominal Linear Range | Approximately 4 mm (160 mils) |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) |
| Recommended Nominal Gap | Approximately 2.5 mm (100 mils) |
| Frequency Response | Up to approximately 8 kHz |
| Probe Tip Material | PPS |
| Probe Case Material | AISI 304 stainless steel |
| Cable Insulation | FEP |
| Typical Applications | Shaft vibration, radial position, axial position, Keyphasor |
| Agency Approval | Multiple Approvals |
| Approximate Product Weight | Approximately 0.1 kg |
| Typical Shipping Weight | Approximately 3 kg, packaging dependent |
Applications
Turbine Shaft Monitoring
The 3300 XL 11 mm platform is well suited to turbine applications requiring continuous shaft-displacement information. It can support compatible radial and axial measurement arrangements.
Radial Vibration
The probe provides non-contact measurement of shaft movement and can be installed at appropriate radial measurement points on critical rotating machinery.
Axial Position
The 11 mm sensing configuration provides a nominal 4 mm linear range, making it useful for axial shaft-position measurements where additional displacement range is desirable.
Differential Expansion
Compatible turbine installations can use 3300 XL 11 mm probes in differential-expansion monitoring arrangements to observe relative movement between rotating and stationary components.
Compressor Monitoring
The probe can be incorporated into appropriate compressor monitoring systems for shaft displacement and other machinery-condition measurements.
Generator and Motor Monitoring
Large motors and generators can use proximity sensing to monitor shaft behavior without physical contact, supporting continuous condition-monitoring strategies.
Keyphasor Applications
When integrated with the appropriate monitoring electronics, the 3300 XL 11 mm probe can provide a phase-reference signal for Keyphasor and related rotational measurements.
Space-Constrained Installations
The 50 mm case length gives this model an advantage where the available mounting depth is limited. It can provide the 11 mm sensing platform while maintaining a relatively compact probe body.
Advantages
Compact 50 mm Case
The 50 mm overall case length makes this configuration particularly useful where installation depth is limited. It offers the capabilities of the 3300 XL 11 mm platform without requiring the longer case lengths found in other 330704 configurations.
Metric M14 x 1.5 Mounting
The M14 x 1.5 metric thread provides a straightforward mounting solution for compatible machinery and makes the probe suitable for metric replacement installations.
11 mm Sensing Technology
The 11 mm design provides a nominal 4 mm linear range, offering additional measurement capability for applications involving greater shaft displacement.
1 m Integral Cable
The 1.0 m cable is a practical choice for installations with short probe-to-sensor distances. It keeps the assembly compact and simplifies cable routing.
Protected ClickLoc Connector
The 01 configuration includes a connector protector, adding mechanical protection around the ClickLoc connection during installation and maintenance.
Armored Construction
The armored cable arrangement provides additional mechanical protection in industrial environments where vibration, abrasion, and restricted routing conditions may be encountered.
Multiple Approvals
The 05 approval option provides the multiple-approval configuration, making the probe suitable for projects where specified agency approvals are part of the instrumentation requirement.
Robust Replacement Option
Because the part number clearly defines the mechanical and cable configuration, the 330704-00-050-10-01-05 is a strong choice when replacing an existing probe with the same 50 mm case, 1 m cable, connector protector, and approval configuration.
Technical FAQs
1. What is the Bently Nevada 330704-00-050-10-01-05?
It is a 3300 XL 11 mm metric proximity probe with a 50 mm case length, 1 m integral cable, ClickLoc connector with protector, armored construction, and multiple approvals.
2. What is the probe diameter?
The probe belongs to the 3300 XL 11 mm family and uses an 11 mm sensing tip configuration.
3. What mounting thread does it use?
The metric 330704 configuration uses an M14 x 1.5 mounting thread.
4. What does the 050 option mean?
The 050 option specifies the 50 mm overall case length.
5. How long is the cable?
The 10 option indicates a nominal 1.0 m (3.3 ft) integral cable.
6. What does the 01 option specify?
The 01 configuration uses a miniature coaxial ClickLoc connector with connector protector and standard cable.
7. What does the final 05 mean?
The final 05 identifies the Multiple Approvals configuration.
8. What is the nominal measurement range?
The 3300 XL 11 mm system provides approximately a 4 mm (160 mil) nominal linear range, with a nominal scale factor of 3.94 V/mm (100 mV/mil).
9. Is the 50 mm version interchangeable with an 80 mm or 100 mm version?
Not automatically. Although the probes may share the same 11 mm sensing family and mounting thread, the overall case length changes the mechanical installation geometry. The replacement should match the original probe dimensions.
10. What should be checked before ordering?
Verify the 330704 model, M14 x 1.5 thread, 0 mm unthreaded length, 50 mm case length, 1 m cable, 01 connector configuration, armored construction, multiple-approval option, target geometry, probe gap, and compatible 3300 XL 11 mm Proximitor Sensor.
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