Introduction
The Bently Nevada 330704-000-080-10-01-05 is a metric 3300 XL 11 mm Proximity Probe engineered for non-contact measurement of shaft vibration, radial position, axial position, and other displacement parameters on critical rotating machinery.
This configuration combines an M14 x 1.5 metric mounting thread, armored construction, 80 mm overall case length, 1.0 m integral cable, and a miniature coaxial ClickLoc connector with connector protector. The final 05 designation specifies the multiple-approval configuration, making this model suitable for applications where additional certification requirements are part of the equipment specification.
The 3300 XL 11 mm platform provides a nominal 4 mm (160 mil) linear range and a nominal scale factor of 3.94 V/mm (100 mV/mil). Its larger sensing tip compared with the 8 mm system provides the extended measurement capability required for applications such as turbine thrust position, differential expansion, compressor rod position, tachometer measurements, and Keyphasor signals.
With its 80 mm case length and short 1 m cable, this version is particularly useful when a specific mounting depth is required and the associated Proximitor Sensor is installed relatively close to the machine.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330704-000-080-10-01-05 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Configuration | Metric |
| Probe Model | 330704 |
| Probe Tip Diameter | 11 mm |
| Mounting Thread | M14 x 1.5 |
| Construction | Armored |
| Unthreaded Length | 0 mm |
| Overall Case Length | 80 mm |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Connector Configuration | With connector protector |
| Cable Type | Standard cable |
| Agency Approval | Multiple Approvals |
| Measurement Principle | Non-contact eddy-current sensing |
| Nominal Linear Range | 4 mm (160 mils) |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) |
| Recommended Nominal Gap | Approximately 2.5 mm (100 mils) |
| Frequency Response | 0 to 8 kHz, typical +0/-3 dB |
| Minimum Flat Target Diameter | 30.5 mm (1.2 in) |
| Recommended Minimum Shaft Diameter | 152 mm (6.0 in) |
| Typical Measurements | Radial vibration, radial position, axial position, Keyphasor |
| Probe Body | Stainless steel |
| Cable Armor | Stainless steel armor |
| Cable Jacket | FEP |
| Probe Temperature Range | Approximately -52°C to +177°C |
| Approximate Probe Assembly Weight | Approximately 0.07–0.10 kg |
| Typical Shipping Weight | Approximately 1–1.5 kg, depending on packaging |
Applications
Steam Turbine Monitoring
The 3300 XL 11 mm system is widely suited to turbine applications requiring reliable shaft-displacement information. It can be incorporated into axial position, thrust position, and differential-expansion monitoring arrangements.
Shaft Vibration Measurement
The probe provides non-contact measurement of shaft movement and can be positioned for radial vibration monitoring on fluid-film-bearing machinery and other compatible rotating equipment.
Axial Position Monitoring
The extended linear range of the 11 mm system makes it particularly valuable for axial or thrust-position measurement, where shaft movement needs to be monitored continuously.
Differential Expansion
The system can be applied to ramp differential-expansion measurements on steam turbines, helping monitor relative movement between turbine rotor and stationary components.
Reciprocating Compressor Applications
The 3300 XL 11 mm system can support rod-position and rod-drop measurements on compatible reciprocating compressor applications.
Keyphasor and Phase Reference
The probe can be used in suitable system configurations for Keyphasor phase-reference signals, tachometer measurements, and zero-speed detection.
Generator and Motor Monitoring
Large generators, motors, and other rotating machines can benefit from non-contact shaft displacement measurement where reliable continuous monitoring is required.
Compact Cable Routing
The 1 m integral cable is a practical option for installations where the probe is located close to its associated signal-conditioning electronics. It avoids unnecessary cable length and can simplify installation.
Advantages
Extended 11 mm Sensing Capability
The 11 mm probe design provides a nominal 4 mm linear range, offering greater measurement travel than the standard 8 mm proximity system and making it suitable for specialized displacement applications.
Precise 80 mm Mechanical Configuration
The 80 mm case length provides a defined installation depth for machinery applications where the physical probe dimensions need to match existing mounting arrangements.
Metric M14 x 1.5 Thread
The M14 x 1.5 mounting thread provides a convenient metric installation solution and makes this model a natural choice for compatible metric machinery.
Armored Construction
The stainless-steel armored cable provides additional mechanical protection against vibration, abrasion, and difficult cable-routing conditions commonly encountered around rotating machinery.
Short 1 m Integral Cable
The 1.0 m cable is ideal for installations with limited distance between the probe and Proximitor Sensor. It provides a compact connection without the excess cable associated with longer configurations.
Protected ClickLoc Connection
The 01 connector option includes a connector protector in addition to the miniature coaxial ClickLoc connection. This provides extra physical protection at an important connection point.
Multiple-Approval Configuration
The final 05 designation provides the multiple-approval version, offering greater flexibility for projects where specific machinery or hazardous-area approval requirements must be addressed.
Robust 3300 XL Design
The 3300 XL 11 mm transducer system incorporates features intended to improve mechanical durability and connection reliability. The ClickLoc connection locks into place, while the probe and cable construction are designed for demanding industrial service.
Technical FAQs
1. What is the Bently Nevada 330704-000-080-10-01-05?
It is a 3300 XL 11 mm metric armored proximity probe with an M14 x 1.5 thread, 80 mm case length, 1 m integral cable, ClickLoc connector with protector, and multiple approvals.
2. Is the 330704-000-080-10-01-05 a metric probe?
Yes. The 330704 configuration uses an M14 x 1.5 metric mounting thread and armored construction.
3. What does the 080 option mean?
The 080 option specifies an 80 mm overall case length.
4. What does the 10 option indicate?
The 10 option specifies a nominal 1.0 m (3.3 ft) integral cable.
5. What is the 01 connector configuration?
The 01 option provides a miniature coaxial ClickLoc connector with connector protector and standard cable.
6. What does the final 05 mean?
The final 05 designation identifies the multiple-approval configuration.
7. What is the nominal linear range?
The 3300 XL 11 mm system provides a nominal 4 mm (160 mil) linear range with a nominal scale factor of 3.94 V/mm (100 mV/mil).
8. What is the recommended nominal gap?
The typical reference gap is approximately 2.5 mm (100 mils). The actual installed gap should be established according to the complete transducer system and machinery target characteristics.
9. Can this probe directly replace a 3300 XL 8 mm probe?
No direct interchangeability should be assumed. The 3300 XL 11 mm probe is designed for its corresponding 11 mm Proximitor Sensor and transducer system. Mechanical dimensions, electrical characteristics, calibration, and measurement range should all be verified.
10. What should be checked before ordering this model?
Confirm the 330704 model, M14 x 1.5 thread, 80 mm case length, 0 mm unthreaded length, 1 m cable, ClickLoc connector with protector, armored construction, multiple-approval configuration, target geometry, probe gap, and compatible 3300 XL 11 mm Proximitor Sensor.
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