Introduction
The Bently Nevada 330703-000-050-10-01-00 3300 XL 11 mm Proximity Probe is a precision non-contact eddy-current probe designed for reliable measurement of shaft vibration, displacement, and position on critical rotating machinery.
This metric 3300 XL 11 mm configuration combines an M14 × 1.5 mounting thread, 50 mm overall case length, 1.0 m integral cable, and a miniature coaxial ClickLoc connector with connector protector. The probe is supplied without armor and does not require an additional agency approval option.
Built for demanding machinery-monitoring environments, the 11 mm sensing platform provides an extended linear measurement range compared with conventional 8 mm proximity systems. It is a practical choice for turbines, compressors, generators, pumps, and other rotating equipment where dependable shaft-motion information is essential.
Technical Specifications
The complete 3300 XL 11 mm transducer system is normally used as a matched combination of probe, extension cable, and Proximitor Sensor. This probe provides the sensing element at the machinery end of that measurement chain.
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL 11 mm |
| Product Type | Proximity Probe |
| Part Number | 330703-000-050-10-01-00 |
| Probe Model | 330703 |
| Mounting Configuration | Standard Mount |
| Thread Type | M14 × 1.5 |
| Armor | Unarmored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 50 mm |
| Integral Cable Length | 1.0 m / 3.3 ft |
| Connector Option | 01 |
| Connector | Miniature coaxial ClickLoc with connector protector |
| Cable Type | Standard cable |
| Approval Option | 00 |
| Measurement Principle | Eddy-current |
| Probe Tip | 11 mm class |
| Nominal Sensitivity | 100 mV/mil / 3.94 V/mm |
| Approx. Linear Range | 4 mm / 160 mil |
| Recommended Nominal Gap | 2.5 mm / 100 mil |
| Typical System Frequency Response | 0–8 kHz |
| Probe Case Material | Stainless steel |
| Cable Construction | Triaxial, FEP insulated |
| Mounting | Metric threaded installation |
Applications
The 330703-000-050-10-01-00 is designed for continuous, non-contact monitoring of rotating machinery. Its 11 mm sensing configuration makes it particularly useful when a longer measurement range is required.
Typical applications include:
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Steam turbine shaft vibration monitoring
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Gas turbine machinery monitoring
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Compressor shaft displacement measurement
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Generator vibration monitoring
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Pump shaft vibration monitoring
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Motor shaft monitoring
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Axial/thrust position measurement
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Turbine differential expansion monitoring
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Reciprocating compressor applications
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Keyphasor reference measurement
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Tachometer applications
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Zero-speed detection
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Bearing and rotor protection
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Predictive maintenance systems
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Critical machinery condition monitoring
In a typical installation, the probe is positioned close to the rotating target surface. Its output is then processed through the appropriate extension cable and Proximitor Sensor to provide a usable vibration or displacement signal for the plant monitoring or machinery-protection system.
Advantages
Extended 11 mm Sensing Capability
The 3300 XL 11 mm platform provides a larger sensing geometry and an approximately 4 mm linear measurement range, making it especially useful for applications involving shaft position and displacement.
Metric M14 × 1.5 Thread
The M14 × 1.5 mounting thread is well suited to equipment designed around metric mechanical standards. It allows straightforward integration into appropriately prepared probe mounting locations.
50 mm Case Length
The 50 mm case provides a useful balance between installation reach and physical compactness. It is suitable for machinery arrangements where a longer probe body is required than shorter 330703 configurations provide.
1-Meter Integral Cable
The factory-configured 1.0 m cable provides practical routing distance from the probe to the extension-cable connection. It also reduces the need for field modifications at the sensing end.
Secure ClickLoc Connection
The miniature coaxial ClickLoc connector provides a positive connection interface, while the connector protector adds additional mechanical protection around the connection area.
Durable Industrial Construction
The probe is designed for permanent industrial machinery installation, with a stainless-steel case and robust sensing-tip construction suitable for demanding operating environments.
Non-Contact Measurement
Eddy-current technology allows the probe to monitor shaft movement without physically touching the rotating component. This eliminates mechanical contact at the sensing point and supports continuous monitoring of high-speed machinery.
Broad Machinery-Monitoring Use
The same 3300 XL 11 mm platform can be applied to vibration, displacement, axial-position, phase-reference, tachometer, and related measurements, making it a versatile option for plant-wide machinery monitoring strategies.
Easy Part-Number Identification
The complete 330703-000-050-10-01-00 ordering code clearly defines the thread, case length, cable length, connector arrangement, and approval configuration. This is especially valuable when replacing installed probes during maintenance or turnaround projects.
Technical FAQs
1. What is the Bently Nevada 330703-000-050-10-01-00?
It is a 3300 XL 11 mm Proximity Probe with an M14 × 1.5 thread, 50 mm case, 1.0 m integral cable, protected ClickLoc connector, standard cable, and no additional agency approval option.
2. What does the 330703 base model indicate?
The 330703 identifies the metric 3300 XL 11 mm probe configuration using an M14 × 1.5 mounting thread and unarmored construction.
3. What does “000” mean?
The 000 section specifies a 0 mm unthreaded length.
4. What does “050” mean?
The 050 specifies the 50 mm overall case length.
5. How long is the integral cable?
The 10 option indicates a 1.0 m integral cable, approximately 3.3 ft.
6. What connector is used?
The 01 option specifies a miniature coaxial ClickLoc connector with connector protector and standard cable.
7. What does the final “00” indicate?
The final 00 identifies the configuration where an additional agency approval option is not required.
8. What is the nominal sensitivity?
The 3300 XL 11 mm system has a nominal scale factor of approximately 100 mV/mil, equivalent to 3.94 V/mm.
9. What is the recommended probe gap?
A nominal operating gap of approximately 2.5 mm (100 mil) is commonly used for the 3300 XL 11 mm system under the specified calibration conditions.
10. Can this probe be directly substituted for a 3300 XL 8 mm probe?
Not automatically. Although both products use eddy-current sensing, the 11 mm and 8 mm systems have different electrical and mechanical characteristics. The compatible probe, extension cable, and Proximitor Sensor should be checked as a complete system before replacement.
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