Introduction
The Bently Nevada 330703-000-060-10-11-05 3300 XL 11 mm Proximity Probe is a precision eddy-current sensing component developed for continuous, non-contact monitoring of rotating machinery. It is designed to measure shaft vibration, radial displacement, axial position, and other dynamic shaft movements where dependable measurement is essential to machinery protection and condition monitoring.
This particular configuration combines an M14 × 1.5 metric mounting thread, 60 mm overall case length, 0 mm unthreaded length, and a 1.0 m integral cable. Its 11 cable option adds a miniature coaxial ClickLoc connector with connector protector and FluidLoc cable, while the final 05 specifies the Multiple Approvals configuration.
The FluidLoc version is especially attractive for demanding machinery installations where the cable may encounter oil, moisture, or other industrial contaminants. Combined with the extended-range 11 mm sensing platform, this configuration provides a robust solution for turbines, compressors, generators, pumps, and other critical rotating equipment.
Technical Specifications
The 330703-000-060-10-11-05 is a metric, standard-mount, unarmored 3300 XL 11 mm proximity probe. The complete part number identifies the mechanical dimensions, cable length, cable construction, connector arrangement, and approval selection.
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL 11 mm |
| Product Type | Proximity Probe |
| Part Number | 330703-000-060-10-11-05 |
| Probe Model | 330703 |
| Mounting Style | Standard Mount |
| Thread | M14 × 1.5 |
| Armor | Without armor |
| Unthreaded Length | 0 mm |
| Overall Case Length | 60 mm |
| Integral Cable Length | 1.0 m / 3.3 ft |
| Connector Option | 11 |
| Connector | Miniature coaxial ClickLoc with connector protector |
| Cable Type | FluidLoc |
| Cable Construction | 75 Ω triaxial, FEP insulated |
| Agency Approval Option | 05 — Multiple Approvals |
| Sensing Technology | Eddy-current |
| Probe Tip Material | PPS |
| Probe Case Material | AISI 304 stainless steel |
| Nominal Scale Factor | 100 mV/mil / 3.94 V/mm |
| Linear Measurement Range | Approx. 4 mm / 160 mil |
| Nominal Probe Gap | Approx. 2.5 mm / 100 mil |
| Typical System Frequency Response | 0–8 kHz |
| Operating / Storage Temperature | Approx. -51°C to +177°C |
| Reference Minimum-Length Probe Weight | Approx. 70 g |
| Estimated 60 mm Net Weight | Approx. 104 g |
The ordering code breaks down as follows:
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330703 — 3300 XL 11 mm probe, M14 × 1.5 thread, without armor
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000 — 0 mm unthreaded length
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060 — 60 mm overall case length
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10 — 1.0 m integral cable
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11 — miniature coaxial ClickLoc connector with connector protector and FluidLoc cable
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05 — Multiple Approvals configuration
Dimensions and Weight
The probe has a 60 mm overall case length and an M14 × 1.5 mounting thread. The unthreaded length is 0 mm, while the integral FluidLoc cable measures 1.0 m.
The published 3300 XL 11 mm documentation gives a reference weight of 70 g for the minimum-length, 1 m, unarmored probe configuration, with an additional 1.1 g/mm for longer case lengths. Using that published increment, a 60 mm case corresponds to an estimated net probe weight of approximately 104 g. This is an engineering estimate rather than a separately specified factory weight for this exact part number.
Applications
Critical Rotating Equipment Monitoring
The 330703-000-060-10-11-05 is intended for applications where shaft movement must be measured continuously without physical contact.
Typical installations include:
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Steam turbines
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Gas turbines
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Turbo-compressors
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Centrifugal compressors
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Reciprocating compressors
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Generators
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Motors
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Pumps
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Gear-driven rotating equipment
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Critical bearing assemblies
Shaft Vibration Measurement
The probe can be used to monitor radial shaft vibration and detect changes in rotor behavior. Continuous vibration information can support machinery-protection systems and predictive maintenance programs.
Axial Position and Displacement
The 3300 XL 11 mm platform is well suited to axial/thrust position and displacement measurements, particularly where the additional measurement range of the 11 mm system is advantageous.
Differential Expansion
The system can be applied to steam-turbine differential-expansion monitoring, where accurate displacement information is important during startup, shutdown, and changing operating conditions.
Keyphasor and Speed Applications
The proximity technology can also be used for Keyphasor, tachometer, and zero-speed functions where a reliable phase or rotational reference signal is required.
Reciprocating Machinery
The extended-range 11 mm platform is useful for reciprocating-compressor rod position and rod-drop monitoring, helping provide an additional layer of machinery protection.
Advantages
Extended 11 mm Sensing Platform
The 3300 XL 11 mm design provides approximately 4 mm (160 mil) of linear measurement range, making it particularly useful for shaft-position and displacement applications where a smaller sensing platform may not provide sufficient range.
60 mm Case Length
The 60 mm case configuration provides more physical probe length than shorter versions in the 330703 family. This can make it a practical option for machinery installations requiring additional probe body length.
Metric M14 × 1.5 Mounting
The M14 × 1.5 thread provides a convenient solution for equipment using metric mounting arrangements. It also simplifies replacement where an existing 330703 installation is already configured around this thread standard.
FluidLoc Cable
One of the key benefits of this specific configuration is the FluidLoc cable. Compared with the standard-cable versions, FluidLoc is designed for demanding industrial environments where enhanced fluid resistance is important. The cable is specified with a 75 Ω triaxial construction and FEP insulation.
Protected ClickLoc Connector
The 11 cable option combines the miniature coaxial ClickLoc connector with a connector protector and FluidLoc cable. This gives the connection additional mechanical protection while maintaining the dedicated 3300 XL connection interface.
Multiple Approvals
The final 05 suffix identifies the Multiple Approvals configuration. This makes the model suitable for projects where the applicable agency-approved version of the 3300 XL 11 mm probe is required.
Durable Materials
The probe uses an AISI 304 stainless-steel case and a PPS sensing tip, providing a rugged package intended for permanent industrial machinery installations.
Non-Contact Measurement
Because the probe uses eddy-current technology, the sensing element does not physically contact the rotating shaft. This eliminates contact wear at the measurement point and makes the technology well suited to high-speed machinery.
Practical Replacement Choice
For plants already standardized on the 3300 XL 11 mm system, this model offers a particularly useful combination of metric mounting, 60 mm case length, 1 m FluidLoc cable, protected ClickLoc connection, and multiple approvals.
Technical FAQs
1. What is the Bently Nevada 330703-000-060-10-11-05?
It is a 3300 XL 11 mm Proximity Probe with an M14 × 1.5 thread, 60 mm case length, 1.0 m FluidLoc cable, protected ClickLoc connector, and Multiple Approvals configuration.
2. What does 330703 identify?
The 330703 base model identifies the metric M14 × 1.5, unarmored 3300 XL 11 mm proximity probe.
3. What does “000” mean?
The 000 section specifies a 0 mm unthreaded length. The metric ordering system allows unthreaded lengths to be selected according to the specified configuration increments.
4. What does “060” specify?
The 060 option identifies a 60 mm overall case length.
5. How long is the integral cable?
The 10 option specifies a 1.0 m (3.3 ft) total integral cable length.
6. What is special about the “11” cable option?
The 11 option specifies a miniature coaxial ClickLoc connector with connector protector and FluidLoc cable. This distinguishes the probe from the 02 standard-cable version and the 01 protected-connector standard-cable version.
7. What does the final “05” mean?
The final 05 specifies the Multiple Approvals option. The alternative 00 configuration indicates that agency approval is not required.
8. What is the nominal probe gap?
The 3300 XL 11 mm system uses a nominal 2.5 mm (100 mil) gap under the specified calibration conditions.
9. What is the measurement range?
The 3300 XL 11 mm system provides approximately 4 mm (160 mil) of linear measurement range, with a nominal scale factor of 100 mV/mil (3.94 V/mm).
10. What is the difference between 330703-000-060-10-11-05 and 330703-000-060-10-02-05?
Both use the M14 × 1.5 thread, 60 mm case, 1.0 m cable, and Multiple Approvals configuration. The important difference is the cable/connector option: 11 uses the ClickLoc connector with protector and FluidLoc cable, while 02 uses the ClickLoc connector with standard cable.
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