Introduction
The Bently Nevada 330703-000-050-10-02-05 3300 XL 11 mm Proximity Probe is a precision eddy-current proximity probe designed for non-contact measurement of shaft vibration, radial displacement, and axial position on critical rotating machinery.
This configuration uses an M14 × 1.5 metric thread, a 50 mm overall case length, and a 1.0 m integral cable. The 02 cable option specifies a miniature coaxial ClickLoc connector with standard cable, while the 05 approval option provides multiple agency approvals including CSA, ATEX, and IECEx.
As part of the 3300 XL 11 mm platform, the probe is engineered for demanding machinery-monitoring applications where stable displacement measurement and dependable long-term operation are essential. It is especially well suited to turbines, compressors, pumps, generators, and other rotating equipment protected by a Bently Nevada proximity transducer system.
Technical Specifications
The 330703-000-050-10-02-05 is a standard-mount, non-armored 3300 XL 11 mm probe. Its complete part number defines the mechanical dimensions, cable length, connector arrangement, and approval configuration.
| Specification | 330703-000-050-10-02-05 |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL 11 mm |
| Product Type | Proximity Probe |
| Model | 330703 |
| Probe Type | 11 mm Eddy-Current Proximity Probe |
| Mounting | Standard Mount |
| Thread | M14 × 1.5 |
| Armor | Without armor |
| Unthreaded Length | 0 mm |
| Overall Case Length | 50 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector/Cable Option | 02 |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Approval Option | 05 |
| Approvals | CSA, ATEX, IECEx |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Cable Construction | 75 Ω triaxial, FEP insulated |
| Typical Sensitivity | 100 mV/mil (3.94 V/mm) |
| Recommended Probe Gap | 2.5 mm (100 mil) |
| System Frequency Response | Approx. 0–8 kHz |
| Probe DC Resistance | Approx. 5.9 Ω for 1 m cable |
| Operating Temperature | Approx. -52°C to +177°C |
| Approx. Net Weight | 70–170 g, configuration dependent |
| Approx. Shipping Weight | Up to 2 kg, depending on packaging |
Applications
The 330703-000-050-10-02-05 is designed for continuous, non-contact displacement monitoring on rotating machinery.
Typical applications include:
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Turbine shaft vibration monitoring
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Radial shaft displacement measurement
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Axial shaft position monitoring
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Thrust position monitoring
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Compressor shaft monitoring
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Generator vibration monitoring
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Pump shaft monitoring
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Gearbox vibration measurement
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Differential expansion applications
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Keyphasor and phase-reference systems
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Bearing vibration monitoring
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Turbine Supervisory Instrumentation (TSI)
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Critical machinery protection systems
The 11 mm sensing platform is particularly valuable where a larger probe system and longer linear measurement range are preferred. The complete 3300 XL 11 mm transducer system is specified for both static and dynamic displacement measurements, with a typical system frequency response extending to approximately 8 kHz.
For reliable results, the probe should be installed with the correct target geometry and operating gap. A nominal 2.5 mm (100 mil) gap is commonly used for the system's calibrated operating point.
Advantages
Precision Eddy-Current Measurement
The probe uses eddy-current proximity sensing, allowing shaft movement to be measured without physical contact. This eliminates mechanical contact between the sensor tip and rotating shaft, making the design particularly appropriate for high-speed machinery.
11 mm Probe Platform
The 3300 XL 11 mm design provides a larger sensing platform than the 8 mm family. It is well suited to demanding position and vibration applications where the additional measurement capability of the 11 mm system is beneficial.
Metric M14 × 1.5 Mounting
The M14 × 1.5 thread provides a clean metric mounting solution for compatible machinery housings and brackets.
Compact 50 mm Case
The 50 mm overall case length gives engineers a compact probe configuration for installations where available mounting space must be carefully managed.
1-Meter Integral Cable
The integrated 1.0 m cable provides useful routing distance from the probe location to the extension-cable connection while keeping the assembly compact.
ClickLoc Connection
The miniature coaxial ClickLoc connector provides a secure, purpose-designed interface for the 3300 XL system. Its locking arrangement helps reduce the risk of accidental connector loosening during installation or machinery operation.
Stainless-Steel Construction
The AISI 304 stainless-steel probe case offers mechanical durability and corrosion resistance suitable for demanding industrial environments.
Multiple Approvals
The 05 approval configuration is designed for installations requiring multiple agency certifications, including CSA, ATEX, and IECEx. This can simplify component selection for internationally deployed machinery and appropriately classified hazardous areas.
Broad Temperature Capability
The 3300 XL 11 mm probe family supports operation across a broad temperature range, approximately -52°C to +177°C, making the technology suitable for many demanding rotating-equipment environments.
Reliable Long-Term Monitoring
When properly paired with the appropriate extension cable and Proximitor Sensor, the probe provides a stable measurement channel for continuous machinery protection, alarm functions, and vibration trending.
Technical FAQs
1. What is the Bently Nevada 330703-000-050-10-02-05?
It is a 3300 XL 11 mm standard-mount proximity probe with an M14 × 1.5 thread, 50 mm case, 1.0 m cable, miniature ClickLoc connector, and multiple agency approvals.
2. What does 330703 indicate?
The 330703 base model identifies a 3300 XL 11 mm probe with an M14 × 1.5 thread and no armor.
3. What does the “000” option specify?
The 000 option specifies a 0 mm unthreaded length.
4. What does “050” mean?
The 050 designation specifies a 50 mm overall case length.
5. How long is the cable?
The 10 configuration specifies a 1.0 m (3.3 ft) integral cable.
6. What does the “02” connector option mean?
The 02 option specifies a miniature coaxial ClickLoc connector with standard cable. It is different from FluidLoc configurations such as option 12.
7. What does the “05” suffix mean?
The 05 agency approval option identifies the multiple-approval configuration, including CSA, ATEX, and IECEx.
8. What is the recommended probe gap?
A nominal 2.5 mm (100 mil) gap is used as the standard operating point for the 3300 XL 11 mm system.
9. What is the approximate weight?
The basic 1 m, non-armored probe reference is approximately 70 g, while some listings specify around 170 g for the configured product. Shipping weight can be much higher because it includes packaging.
10. Can this probe be used with a 3300 XL 8 mm Proximitor Sensor?
The probe should be matched with the appropriate 3300 XL 11 mm Proximitor Sensor and extension cable configuration. The 11 mm and 8 mm systems should not be treated as interchangeable simply because both use eddy-current proximity technology.
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