Introduction
The Bently Nevada 330704-000-080-10-12-00 is a metric 3300 XL 11 mm Proximity Probe designed for non-contact measurement of shaft vibration, position, and displacement on critical rotating machinery.
This configuration combines an M14 x 1.5 metric thread, armored construction, 80 mm overall case length, 1.0 m integral cable, and a miniature coaxial ClickLoc connector with FluidLoc cable. Unlike the 01 configuration, the 12 connector option does not include the connector protector. The final 00 indicates that no additional agency approval is required.
The 3300 XL 11 mm platform provides a nominal 4 mm (160 mil) linear range and 3.94 V/mm (100 mV/mil) nominal scale factor, making it a strong choice for shaft vibration, radial position, axial position, differential expansion, Keyphasor, tachometer, and zero-speed applications.
For replacement projects, the complete part number matters. The combination of 80 mm case length, 1 m cable, FluidLoc cable construction, connector style, metric mounting thread, and approval option should be matched with the existing installation rather than selecting a probe based only on the 11 mm sensing diameter.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330704-000-080-10-12-00 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Configuration | Metric |
| Probe Model | 330704 |
| Probe Tip Diameter | 11 mm |
| Mounting Thread | M14 x 1.5 |
| Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 80 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | FluidLoc |
| Connector Protector | Not included |
| Agency Approval | 00 – Not required |
| Measurement Principle | Non-contact eddy-current sensing |
| Nominal Linear Range | 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 | 0 to 8 kHz, typical +0/-3 dB |
| Minimum Flat Target Diameter | 30.5 mm (1.2 in) |
| Recommended Minimum Shaft Diameter | 152 mm (6.0 in) |
| Typical Measurements | Radial vibration, radial position, axial position, Keyphasor |
| Probe Body | Stainless steel |
| Cable Armor | Stainless steel |
| Cable Jacket | FEP |
| Cable Construction | FluidLoc |
| Approximate Probe Assembly Weight | Approximately 0.1 kg, configuration dependent |
| Typical Shipping Weight | Approximately 1–1.5 kg, packaging dependent |
Applications
Steam Turbine Monitoring
The 3300 XL 11 mm system is well suited to steam-turbine applications requiring reliable measurement of shaft displacement. It can support axial position and differential-expansion monitoring where the installation geometry is appropriate.
Radial Shaft Vibration
The non-contact eddy-current design allows the probe to monitor shaft movement without physical contact. This makes it suitable for continuous vibration measurement on critical rotating equipment.
Axial Position Measurement
With its nominal 4 mm linear range, the 11 mm system offers additional measurement travel for axial shaft-position applications where a smaller proximity system may not provide sufficient range.
Differential Expansion
The probe can be incorporated into compatible differential-expansion measurement arrangements on turbines, helping monitor relative movement between rotor and stationary components.
Compressor Monitoring
The 3300 XL 11 mm platform can be applied to suitable compressor installations for shaft displacement and other machinery-monitoring duties.
Keyphasor and Phase Reference
The probe can be used in an appropriate transducer arrangement for Keyphasor phase-reference signals, providing rotational reference information for machinery-monitoring systems.
Tachometer and Zero-Speed Measurement
Compatible installations can use the 3300 XL 11 mm system for tachometer and zero-speed measurements, extending its usefulness beyond conventional vibration monitoring.
Fluid-Exposed Cable Environments
The FluidLoc cable is an important feature of this configuration. It provides a specialized cable construction for applications where protection against fluid penetration is a consideration. This makes the 12 option especially relevant when the original installation specifically calls for FluidLoc cable.
Advantages
Extended 11 mm Measurement Range
The 3300 XL 11 mm system provides a nominal 4 mm (160 mil) linear range, giving engineers additional displacement-measurement capability for demanding machinery applications.
80 mm Case Length
The 80 mm case configuration provides a specific mechanical installation dimension. Matching this length is particularly important when replacing an existing probe without modifying the machine's mounting arrangement.
Metric M14 x 1.5 Thread
The M14 x 1.5 mounting thread provides a dependable metric solution for compatible machinery installations and replacement projects.
FluidLoc Cable
The 12 option uses FluidLoc cable, distinguishing it from the standard-cable 01 and 02 configurations. This cable selection can be particularly valuable where cable exposure to fluids or demanding industrial conditions is a concern.
No Connector Protector
The 12 configuration uses the ClickLoc connector without the connector protector. This provides a simpler connector arrangement when the additional protector included with option 11 is not required by the installation.
Compact 1 m Cable
The 1.0 m integral cable keeps the overall installation compact when the probe and associated Proximitor Sensor are positioned close together.
Armored Construction
The stainless-steel armored construction provides additional mechanical protection against vibration, abrasion, and demanding cable-routing conditions.
Flexible Monitoring Capability
The 3300 XL 11 mm system can support multiple measurement functions, including radial vibration, axial position, radial position, Keyphasor, tachometer, and zero-speed applications when the complete system is correctly configured.
Technical FAQs
1. What is the Bently Nevada 330704-000-080-10-12-00?
It is a 3300 XL 11 mm metric armored proximity probe featuring an M14 x 1.5 thread, 80 mm case length, 1 m integral cable, ClickLoc connector, FluidLoc cable, and standard approval configuration.
2. Is this probe metric?
Yes. The 330704 model uses an M14 x 1.5 metric mounting thread and is the armored metric version of the 3300 XL 11 mm probe family.
3. What does the 080 option specify?
The 080 option identifies the 80 mm overall case length.
4. What does the 10 option mean?
The 10 option specifies a nominal 1.0 m (3.3 ft) integral cable.
5. What is special about the 12 connector option?
The 12 option specifies a miniature coaxial ClickLoc connector with FluidLoc cable. Unlike option 11, it does not include the connector protector.
6. What is FluidLoc cable?
FluidLoc is a specialized cable configuration used with the 3300 XL 11 mm probe family. It differs from the standard cable option and should be matched to the original installation when FluidLoc is specified.
7. What does the final 00 indicate?
The final 00 identifies the not-required agency approval configuration. The appropriate approval option should always be selected according to the requirements of the actual installation.
8. What is the nominal linear range?
The 3300 XL 11 mm system provides a nominal 4 mm (160 mil) linear range with a nominal 3.94 V/mm (100 mV/mil) scale factor.
9. What is the recommended nominal gap?
The nominal reference gap is approximately 2.5 mm (100 mils). The actual installed gap should be established according to the complete transducer system, target material, shaft dimensions, and machinery requirements.
10. Can this probe be replaced with the 330704-000-080-10-11-00?
The two models share the same basic 330704, 80 mm, 1 m configuration, but their cable/connector options differ. 11 uses a connector protector with FluidLoc cable, while 12 uses FluidLoc cable without the connector protector. The replacement should therefore match the original installation requirements rather than being selected solely by the probe's mechanical dimensions.
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