Introduction
The Bently Nevada 330704-000-050-10-02-05 is a 3300 XL 11 mm proximity probe developed for non-contact measurement of shaft vibration and position on critical rotating machinery. This particular configuration combines an M14 x 1.5 metric threaded body, armored construction, 50 mm overall case length, 1.0 m integral cable, and miniature coaxial ClickLoc connector.
What makes this configuration especially useful for replacement projects is its clearly defined mechanical and connection characteristics. The 330704 probe family is designed for applications where dependable displacement measurement, stable signal performance, and robust installation are priorities. The 11 mm sensing system also provides a larger nominal linear measurement range than the 8 mm system when correctly paired with the corresponding 3300 XL Proximitor Sensor and extension cable.
The “-05” agency approval option indicates multiple approvals, making this version suitable for projects where specific regulatory or installation requirements must be considered. For critical machinery, matching the complete part number is an important step toward maintaining the intended transducer-system performance.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330704-000-050-10-02-05 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Probe Model | 330704 |
| Probe Diameter | 11 mm |
| Thread Type | M14 x 1.5 |
| Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 50 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Agency Approval Option | 05 – Multiple Approvals |
| Measurement Principle | Eddy-current, non-contact sensing |
| Nominal Scale Factor | 100 mV/mil (3.94 V/mm) |
| Nominal Linear Range | 4.0 mm (160 mils) |
| Recommended Nominal Gap | Approximately 2.5 mm (100 mils) |
| Typical Measurement | Shaft vibration and shaft position |
| Typical System | 3300 XL Proximity Transducer System |
| Typical Applications | Turbines, compressors, generators, pumps, motors, gearboxes |
| Shipping Weight | Approximately 2 kg, depending on packaging and supplier configuration |
Applications
The 330704-000-050-10-02-05 is intended for industrial machinery where continuous shaft displacement information plays an important role in machine protection or condition monitoring.
Steam and Gas Turbines
The probe can be used to monitor shaft vibration and position on turbine trains. Continuous displacement data can help identify abnormal rotor behavior and support protective monitoring strategies.
Centrifugal Compressors
Compressors often require dependable vibration and shaft-position measurement because rotor instability can have significant consequences. The 3300 XL 11 mm system provides a non-contact sensing solution for compatible compressor monitoring installations.
Generators and Motors
For large rotating electrical machines, proximity measurements can complement other condition-monitoring techniques by providing direct information about shaft movement relative to the probe.
Pumps and Auxiliary Machinery
Critical pumps, gearboxes, and other rotating assets can benefit from continuous vibration and position monitoring, particularly where unexpected mechanical movement could result in equipment damage or production interruption.
Thrust and Axial Position Monitoring
The 3300 XL 11 mm platform can support axial-position measurement applications when the probe is installed with the correct target geometry and connected to the appropriate monitoring equipment.
Machinery Protection Systems
The probe supplies the displacement signal used by compatible Proximitor and monitoring equipment. When properly engineered as part of a complete system, this information can contribute to alarm, diagnostic, and protective functions.
Advantages
Larger 11 mm Sensing Platform
The 11 mm configuration offers a nominal 4.0 mm linear range, providing greater measurement capability than the typical 8 mm system. This can be valuable on machinery where additional displacement range is desirable.
Metric M14 x 1.5 Mounting
The M14 x 1.5 threaded body provides a straightforward mounting solution for equipment designed around metric hardware and makes the probe a practical replacement for matching 330704 installations.
Armored Cable Protection
The armored construction provides additional mechanical protection around the cable, helping the probe withstand demanding routing conditions, vibration, and incidental mechanical contact.
50 mm Case Configuration
The 50 mm case length provides a defined mounting geometry that can be important when replacing an existing probe in an established machinery installation.
1 m Integral Cable
A 1 m cable offers a clean installation where the probe and associated electronics are positioned relatively close together. It also reduces unnecessary cable slack in compact installations.
ClickLoc Connection
The miniature coaxial ClickLoc connector provides a secure connection arrangement designed for industrial vibration-monitoring installations.
Multiple Approval Option
The 05 approval configuration is intended for installations requiring multiple applicable approvals. This can make the exact version more attractive for projects with defined regulatory and site-certification requirements.
Technical FAQs
1. What is the Bently Nevada 330704-000-050-10-02-05?
It is a 3300 XL 11 mm proximity probe featuring an M14 x 1.5 threaded, armored body, 50 mm case length, 1.0 m integral cable, miniature coaxial ClickLoc connector, and multiple-approval configuration.
2. What type of measurement does this probe perform?
It performs non-contact eddy-current displacement measurement, allowing compatible monitoring systems to measure shaft vibration and shaft position without physical contact with the rotating target.
3. What does the 330704 model indicate?
The 330704 model identifies the 3300 XL 11 mm proximity probe with M14 x 1.5 metric threading and armor.
4. What is the case length of 330704-000-050-10-02-05?
The 050 portion of the part number specifies a 50 mm overall case length.
5. How long is the probe cable?
The 10 configuration indicates a 1.0 m (3.3 ft) integral cable.
6. What connector is used?
The 02 option specifies a miniature coaxial ClickLoc connector with standard cable.
7. What does the “05” suffix mean?
The final 05 identifies the multiple agency approval option. The exact approvals applicable to an installation should be checked against the current certification requirements and the complete installed transducer system.
8. What is the nominal linear range of the 3300 XL 11 mm system?
The nominal linear range is approximately 4.0 mm (160 mils) when the probe is used with the appropriate 3300 XL 11 mm system components.
9. Does the probe need to be connected to a Proximitor Sensor?
Yes. The probe is one component of a complete proximity transducer system. Proper signal conditioning and calibrated operation require the appropriate compatible Proximitor Sensor and, where applicable, extension cable.
10. What should be checked before ordering this probe as a replacement?
Confirm the 330704 probe model, M14 x 1.5 thread, 50 mm case length, 1 m cable, ClickLoc connector, armored construction, approval option, and compatibility with the existing Proximitor Sensor and extension cable. Matching only the 11 mm diameter does not guarantee a correct replacement.
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