Introduction
The Bently Nevada 330704-000-050-10-02-CN is a 3300 XL 11 mm proximity probe configured for metric installation and demanding machinery monitoring applications. Built around the 330704 probe design, this version combines an M14 x 1.5 threaded probe with armor, a 50 mm overall case length, a 1.0 m integral cable, and a miniature coaxial ClickLoc connector.
The configuration code also identifies the CN country-specific approval option, making this version particularly relevant to installations where the applicable China-market regulatory and hazardous-area requirements need to be addressed. The 3300 XL 11 mm platform is intended for non-contact measurement of shaft vibration and position and can be integrated into machinery protection and condition-monitoring systems when paired with the appropriate Proximitor Sensor and monitoring hardware.
For maintenance teams replacing an existing probe, the detailed configuration is important. The 50 mm case length and 1 m cable distinguish this model from otherwise similar 330704 variants, helping ensure that the replacement matches the original mechanical installation rather than simply matching the probe family.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330704-000-050-10-02-CN |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Probe Model | 330704 |
| Probe Thread | M14 x 1.5 |
| Probe Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 50 mm |
| Total Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc connector |
| Cable Type | Standard cable |
| Approval Option | CN, country-specific approvals |
| Sensing Technology | Eddy-current, non-contact displacement measurement |
| Nominal Scale Factor | 100 mV/mil (3.94 V/mm), nominal |
| Typical Linear Range | 4 mm (160 mils), nominal system specification |
| Recommended Probe Gap | Approximately 2.5 mm (100 mils) |
| Typical Applications | Shaft vibration, radial position, axial position, thrust and Keyphasor measurements |
| Probe Case Material | Stainless steel construction |
| Typical Operating Environment | Industrial rotating machinery |
| Shipping Weight | Approximately 2 kg, depending on packaging and supplier configuration |
Applications
The 330704-000-050-10-02-CN is designed for installations where precise, repeatable proximity measurements are required around rotating machinery. Its 3300 XL 11 mm configuration makes it a strong candidate for applications that benefit from the larger sensing geometry of the 11 mm probe family.
Turbine and Generator Monitoring
Proximity probes can be used to monitor shaft vibration and position in turbine-generator trains. Continuous displacement information helps plant personnel identify changes in machine behavior before they develop into more serious mechanical problems.
Compressor Condition Monitoring
The probe can support vibration and position measurements on critical compressor machinery when used with the appropriate monitoring system. Its armored construction is useful where the probe lead requires additional mechanical protection.
Thrust and Axial Position Measurement
The non-contact sensing principle makes the 3300 XL 11 mm system suitable for monitoring axial shaft movement and thrust-related conditions on compatible machinery.
Radial Shaft Vibration
Installed correctly relative to the shaft target, the probe can provide dynamic displacement information for machinery vibration monitoring and protective functions.
Keyphasor and Phase Reference
3300 XL proximity probes can also be incorporated into systems requiring a once-per-revolution reference signal, provided the complete transducer arrangement is configured appropriately.
Hazardous-Area Installations
The CN approval option makes this particular configuration relevant to installations where country-specific approval requirements are part of the equipment-selection process. The exact hazardous-area suitability must always be evaluated against the complete installed transducer system and the applicable site requirements.
Advantages
A Precisely Defined Replacement Configuration
The 330704-000-050-10-02-CN is more than a generic 3300 XL 11 mm probe. Its part number specifies the thread, case length, cable length, connector arrangement, and approval configuration, making it easier to match an existing installation accurately.
50 mm Case Length
The 50 mm case option provides a useful mounting geometry for machinery installations requiring more case length than shorter 330704 configurations. This can simplify replacement planning where existing probe hardware has already been designed around a particular installation dimension.
Armored Cable Protection
The armored construction adds mechanical protection to the cable assembly. This is valuable around equipment where vibration, abrasion, or restricted routing could otherwise place additional stress on the probe lead.
ClickLoc Connector Design
The miniature coaxial ClickLoc connection provides a secure connection arrangement for the probe and associated cable system. A positive locking connection is particularly useful around machinery subject to continuous vibration.
Compact 1 m Cable
The 1 m integral cable offers a practical solution where the associated electronics are installed relatively close to the probe location. It also avoids unnecessary excess cable in compact machinery installations.
Proven 3300 XL Platform
The 3300 XL family provides a mature platform for machinery vibration and position monitoring. Choosing the correct 330704 configuration allows users to retain the mechanical and electrical characteristics required by an established monitoring installation.
Technical FAQs
1. What is Bently Nevada 330704-000-050-10-02-CN?
It is a 3300 XL 11 mm proximity probe with an M14 x 1.5 metric thread, armored construction, 50 mm overall case length, 1 m integral cable, miniature coaxial ClickLoc connector, and CN country-specific approval configuration.
2. What does the 330704 portion of the part number indicate?
The 330704 model identifies the 3300 XL 11 mm proximity probe configuration using an M14 x 1.5 thread with armor.
3. What is the overall case length?
The 050 option specifies a 50 mm overall case length.
4. How long is the integral cable?
The 10 option specifies a total integral cable length of 1.0 m (3.3 ft).
5. What connector does this probe use?
The 02 configuration uses a miniature coaxial ClickLoc connector with standard cable.
6. What does the CN suffix mean?
The CN suffix identifies a country-specific approval configuration associated with China-market regulatory requirements. When the probe is intended for hazardous-area service, the complete system certification and installation requirements should be verified rather than relying on the probe designation alone.
7. What type of mounting thread does the probe have?
The 330704 probe uses an M14 x 1.5 metric thread.
8. What is the typical measurement gap for a 3300 XL 11 mm system?
A nominal probe gap of approximately 2.5 mm (100 mils) is commonly used as the reference gap for the 3300 XL 11 mm system. Actual installation should follow the requirements of the complete transducer system.
9. Can this probe measure shaft vibration?
Yes. When paired with the appropriate 3300 XL Proximitor Sensor and monitoring equipment, the probe can be used for non-contact shaft vibration and position measurements on compatible rotating machinery.
10. What should be checked before replacing another 3300 XL probe with this model?
Verify the probe model, M14 x 1.5 thread, 50 mm case length, cable length, connector type, armor configuration, approval requirements, and compatibility with the existing Proximitor Sensor. Matching only the 11 mm probe diameter is not sufficient to guarantee a correct replacement.
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