Introduction
The Bently Nevada 330703-000-070-10-02-CN 3300 XL 11 mm Proximity Probe is a precision non-contact eddy-current sensor designed for reliable shaft vibration, displacement, and position monitoring on critical rotating machinery.
This configuration combines a metric M14 × 1.5 mounting thread, 70 mm overall case length, 0 mm unthreaded length, and a 1.0 m integral cable. The probe uses a miniature coaxial ClickLoc connector with standard cable, while the CN suffix identifies the country-specific approval configuration for China.
The 3300 XL 11 mm platform provides a longer linear measurement range than the 3300 XL 8 mm system, making it a practical choice for applications involving shaft displacement, axial position, radial vibration, Keyphasor, and other machinery-monitoring measurements.
Technical Specifications
The complete part number defines the mechanical and electrical configuration of this particular probe.
| Specification | Details |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL 11 mm |
| Product Type | Proximity Probe |
| Part Number | 330703-000-070-10-02-CN |
| Probe Model | 330703 |
| Mounting Style | Standard Mount |
| Thread | M14 × 1.5 |
| Armor | Without armor |
| Unthreaded Length | 0 mm |
| Overall Case Length | 70 mm |
| Integral Cable Length | 1.0 m / 3.3 ft |
| Connector Option | 02 |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Approval Option | CN — Country-Specific Approvals |
| Sensing Technology | Eddy-current |
| 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 Range | 0–8 kHz |
| Probe Tip Material | Polyphenylene sulfide (PPS) |
| Probe Case Material | AISI 304 stainless steel |
| Cable Construction | 75 Ω triaxial, FEP insulated |
| Reference Operating Temperature | Approx. -51°C to +177°C |
| Reference Net Weight | Configuration dependent |
| Typical Shipping Weight | Approx. 1–2 kg, packaging dependent |
Applications
Rotating Machinery Vibration
The probe provides non-contact measurement of shaft movement and is suitable for continuous vibration monitoring on high-value rotating equipment.
Typical equipment includes:
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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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Generators
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Motors
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Pumps
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Gearboxes
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Critical rotating shafts
Axial Position Monitoring
The extended-range 11 mm design is particularly useful for axial/thrust position measurements, where accurate detection of shaft movement is important for machinery protection.
Differential Expansion
The 3300 XL 11 mm system can be applied to steam-turbine differential expansion monitoring, helping operators observe changes in relative rotor and casing movement.
Reciprocating Compressor Monitoring
The system is also suitable for rod position and rod-drop measurements on reciprocating compressors, providing valuable information for machinery protection.
Keyphasor and Speed Measurement
The probe can be used for Keyphasor, tachometer, and zero-speed applications, providing a reliable reference for rotational position and speed-related monitoring.
China-Specific Installations
The CN approval configuration makes this version particularly relevant to projects where country-specific regulatory or compliance requirements in China must be addressed. The approval suffix should always be checked against the requirements of the actual installation.
Advantages
Extended 11 mm Measurement Capability
The 3300 XL 11 mm platform provides approximately 4 mm (160 mil) of linear measurement range, giving it an advantage in applications where additional displacement range is required.
70 mm Mechanical Configuration
The 70 mm case length provides greater probe-body length than shorter variants. This can be especially useful where the machinery mounting arrangement requires a longer standard-mount probe.
Metric M14 × 1.5 Thread
The M14 × 1.5 mounting arrangement provides a practical solution for metric machinery installations and replacement projects already using the 330703 probe family.
Standard ClickLoc Connection
The 02 connector option uses a miniature coaxial ClickLoc connector with standard cable, providing a dedicated connection arrangement for the 3300 XL transducer system.
1-Meter Integral Cable
The 1.0 m integral cable gives installers useful routing distance between the probe location and the extension cable while retaining a factory-configured transducer assembly.
Durable Industrial Construction
The probe uses an AISI 304 stainless-steel case and PPS tip material. Its 75 Ω triaxial FEP-insulated cable construction is intended for demanding industrial machinery environments.
Non-Contact Measurement
Eddy-current sensing allows the probe to monitor a conductive shaft target without physical contact. This avoids mechanical contact wear and makes the technology well suited to high-speed rotating equipment.
Country-Specific Approval Option
The CN suffix is designed for country-specific approval requirements associated with China. For projects requiring local regulatory compliance, this can make the configuration more appropriate than a standard 00 approval version.
Well-Suited for Replacement Projects
For existing 3300 XL 11 mm installations, the clearly defined M14 × 1.5 / 70 mm / 1 m / ClickLoc / CN configuration makes identification and specification more straightforward, helping reduce the risk of selecting a probe with an incorrect mechanical or approval configuration.
Technical FAQs
1. What is the Bently Nevada 330703-000-070-10-02-CN?
It is a 3300 XL 11 mm Proximity Probe with an M14 × 1.5 thread, 70 mm case length, 1.0 m integral cable, miniature coaxial ClickLoc connector, standard cable, and CN country-specific approval configuration.
2. What does the 330703 base model indicate?
The 330703 model identifies a 3300 XL 11 mm probe with an M14 × 1.5 thread and no armor.
3. What does “000” mean?
The 000 section specifies a 0 mm unthreaded length.
4. What does “070” mean?
The 070 section identifies the 70 mm overall case length. This is one of the key differences between this model and shorter 330703 variants.
5. How long is the integral cable?
The 10 option specifies a 1.0 m (3.3 ft) total cable length.
6. What connector is used?
The 02 option specifies a miniature coaxial ClickLoc connector with standard cable. The 11 option, by comparison, uses a protected ClickLoc connector with FluidLoc cable.
7. What does the “CN” suffix mean?
The CN suffix identifies the country-specific approval configuration associated with China. It should be selected when the installation requires the applicable China-specific regulatory or compliance configuration.
8. What is the nominal probe gap?
The 3300 XL 11 mm system uses a nominal 2.5 mm (100 mil) probe gap under its specified reference 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 or 3.94 V/mm.
10. What is the difference between 330703-000-070-10-02-CN and 330703-000-070-10-02-00?
The basic mechanical and cable configuration is the same: M14 × 1.5 thread, 0 mm unthreaded length, 70 mm case length, 1.0 m cable, and standard ClickLoc connector. The important difference is the approval suffix: CN provides the country-specific approval configuration for China, whereas 00 indicates that no agency approval option is selected.
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