Introduction
The Bently Nevada 330704-00-70-10-02-00 is a 3300 XL 11 mm Proximity Probe designed for non-contact measurement of shaft vibration and displacement on critical rotating machinery. The documented 330704 configuration corresponding to this option sequence is commonly listed as 330704-000-070-10-02-00, with a 70 mm overall case length, 1.0 m integral cable, miniature coaxial ClickLoc connector, and standard cable.
The 3300 XL 11 mm platform is particularly useful when a longer linear measurement range is required. Its 11 mm sensing tip supports applications such as axial position, ramp differential expansion, rod position, and rod-drop monitoring, in addition to conventional vibration and displacement measurement.
For replacement work, the complete ordering code should always be checked against the installed probe. In particular, the 70 mm case length, 1 m cable, connector option, and approval suffix define the practical installation configuration.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number Provided | 330704-00-70-10-02-00 |
| Documented Configuration | 330704-000-070-10-02-00 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Probe Model | 330704 |
| Sensing Diameter | 11 mm |
| Mounting Thread | M14 x 1.5 |
| Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 70 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Connector Protector | Not included with 02 configuration |
| Agency Approval | 00 – Not required |
| Measurement Principle | Eddy-current, non-contact sensing |
| Nominal Linear Range | Approximately 4 mm (160 mils) |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) |
| Typical Measurements | Vibration, radial position, axial position |
| Typical System Applications | Turbines, compressors, generators, motors |
| Probe Tip Material | PPS |
| Probe Body | AISI 304 stainless steel |
| Cable Insulation | FEP |
| Approximate Product Weight | 0.17 kg |
| Typical Shipping Weight | Approximately 1 kg |
Applications
Steam Turbine Monitoring
The 3300 XL 11 mm system is well suited to turbine monitoring where accurate shaft displacement information is important. It can be incorporated into compatible axial-position and differential-expansion measurement arrangements.
Axial Thrust Position
The larger 11 mm sensing tip provides a longer linear range than the standard 3300 XL 8 mm system, making the platform useful for axial or thrust-position measurements where additional range is needed.
Ramp Differential Expansion
Steam turbines can use suitable 3300 XL 11 mm arrangements for ramp differential-expansion measurements, helping monitor relative movement between rotating and stationary components.
Compressor Rod Position
The 3300 XL 11 mm platform can be used in suitable reciprocating-compressor applications for rod-position and rod-drop measurement, where its longer linear range offers a practical advantage.
Radial Shaft Vibration
The probe provides non-contact measurement of shaft movement and can be installed at appropriate radial measurement locations on critical machinery.
Generator and Motor Monitoring
Large motors and generators can benefit from proximity measurement for shaft displacement and vibration monitoring without physical contact with the rotating shaft.
Machinery Protection Systems
When paired with the correct 3300 XL Proximitor Sensor and monitoring electronics, the probe can provide displacement information for continuous monitoring, alarm functions, and machinery protection.
Advantages
70 mm Case Length
The 70 mm case configuration provides a useful middle ground between compact short-body probes and longer 80 mm or 100 mm versions. It is especially valuable when the original mounting geometry calls for a specific 70 mm body.
Extended 11 mm Measurement Capability
The 3300 XL 11 mm platform provides a nominal 4 mm linear range, making it well suited to applications requiring greater displacement range than typical 8 mm proximity systems.
Metric M14 x 1.5 Thread
The metric mounting thread makes the probe a convenient choice for compatible metric machinery installations and replacement programs.
Non-Contact Measurement
Eddy-current sensing measures shaft movement without physical contact. This minimizes mechanical wear at the sensing interface and supports continuous monitoring.
1 m Integral Cable
The 1.0 m cable keeps the assembly relatively compact while providing sufficient reach for many probe-to-Proximitor installations.
ClickLoc Connector
The miniature coaxial ClickLoc connector provides a secure connection to compatible 3300 XL system components and supports efficient installation and maintenance.
Armored Construction
The armored 330704 construction adds mechanical protection around the probe cable, making it suitable for demanding industrial environments.
Standard Cable Configuration
The 02 option uses standard cable, providing a straightforward configuration for installations that do not specifically require the FluidLoc cable options.
Practical Replacement Choice
For an existing installation using a 70 mm 330704 probe, matching the complete 70 mm / 1 m / 02 / 00 configuration can help minimize mechanical and electrical changes during maintenance.
Technical FAQs
1. What is the Bently Nevada 330704-00-70-10-02-00?
It is identified as a 3300 XL 11 mm proximity probe. The documented equivalent configuration is 330704-000-070-10-02-00, featuring a 70 mm case, 1 m cable, ClickLoc connector, standard cable, and no required agency approval.
2. What is the case length?
The 070 option specifies a 70 mm overall case length.
3. What mounting thread does the probe use?
The 330704 model uses an M14 x 1.5 metric thread and armored construction.
4. How long is the integral cable?
The 10 option specifies a 1.0 m (3.3 ft) cable.
5. What does the 02 option mean?
The 02 option specifies a miniature coaxial ClickLoc connector with standard cable.
6. Does the 02 configuration include a connector protector?
No. The 02 configuration is the standard ClickLoc arrangement without the connector protector associated with the protected connector option.
7. What does the final 00 indicate?
The final 00 identifies the configuration where agency approval is not required.
8. What is the nominal scale factor?
The 3300 XL 11 mm system has a nominal 3.94 V/mm (100 mV/mil) output scale factor for non-contact vibration and displacement measurement.
9. What is the approximate weight?
A listed product weight is approximately 170 g, while shipping weight is listed at approximately 1 kg.
10. Can this probe replace an 80 mm or 100 mm 330704?
Not automatically. Although the probe family, thread, and electrical principle may be similar, case length directly affects the mechanical installation. A 70 mm probe should be selected when the original installation requires the corresponding 70 mm geometry.
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