Introduction
The Bently Nevada 330707-00-30-10-02-00 is a 3300 XL 11 mm Proximity Probe intended for non-contact measurement of shaft vibration, displacement, and position on critical rotating equipment.
This configuration belongs to the 330707 standard-mount, 5/8-18 UNF, unarmored probe family. The ordering configuration specifies 0.0 in unthreaded length, a 3.0 in overall case length, 1.0 m integral cable, miniature coaxial ClickLoc connector, standard cable, and no agency approval requirement. The 3300 XL 11 mm system is designed around a nominal 3.94 V/mm (100 mV/mil) output and provides a longer linear measurement range than the 3300 XL 8 mm system.
The 3.0-inch body gives this model a useful mechanical configuration for installations that require more case length than the shorter 2.5-inch versions. As a proven component of a complete 3300 XL 11 mm transducer system, it can support demanding monitoring functions including radial vibration, axial position, Keyphasor, tachometer, and other compatible displacement measurements.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Part Number | 330707-00-30-10-02-00 |
| Product Family | 3300 XL |
| Product Type | 11 mm Proximity Probe |
| Probe Model | 330707 |
| Mounting Type | Standard Mount |
| Sensing Diameter | 11 mm |
| Mounting Thread | 5/8-18 UNF-2A |
| Construction | Without armor |
| Unthreaded Length | 0.0 in |
| Overall Case Length | 3.0 in (76.2 mm) |
| Integral Cable Length | 1.0 m (3.3 ft) |
| Connector | Miniature coaxial ClickLoc |
| Cable Type | Standard cable |
| Connector Protector | Not included |
| Agency Approval | 00 – Not required |
| Measurement Principle | Eddy-current, non-contact |
| Nominal Linear Range | Approximately 4 mm (160 mils) |
| Nominal Scale Factor | 3.94 V/mm (100 mV/mil) |
| Measurement Frequency | 0 to 8 kHz |
| Recommended Gap | Approximately 2.5 mm (100 mils) |
| Typical Target Diameter | 30.5 mm (1.2 in) or larger |
| Typical Applications | Radial vibration, position, axial position, Keyphasor |
| Probe Cable Jacket | FEP |
| Approximate Probe Weight | Approximately 45 g |
| Operating / Storage Temperature | Approximately -51°C to +177°C |
Applications
Turbine Shaft Vibration
The 3300 XL 11 mm system is designed for non-contact vibration measurement on fluid-film-bearing machinery. It can be incorporated into turbine monitoring systems where accurate shaft movement information is required.
Axial Thrust Position
The longer linear range of the 11 mm sensing platform makes it well suited to axial or thrust-position measurements where the additional range is advantageous.
Steam Turbine Differential Expansion
Compatible 3300 XL 11 mm arrangements can be used for ramp differential-expansion measurements on steam turbines, helping operators monitor relative movement between rotating and stationary components.
Reciprocating Compressor Monitoring
The 11 mm system is also used in appropriate reciprocating-compressor applications for rod position and rod-drop measurements.
Keyphasor and Phase Reference
The probe can be incorporated into suitable Keyphasor arrangements for phase reference, rotational-speed measurement, and vibration analysis.
Tachometer and Zero-Speed Measurement
The proximity sensing principle supports compatible tachometer and zero-speed applications, providing a non-contact method for detecting rotating-machine targets.
Generator and Motor Monitoring
Large motors and generators can use compatible proximity transducer arrangements for continuous shaft displacement and vibration monitoring.
Machinery Protection
When paired with the correct 3300 XL 11 mm Proximitor Sensor and extension cable, the probe can form part of a complete machinery-monitoring chain for vibration, position, alarm, and protection functions.
Advantages
3.0-Inch Case Configuration
The 3.0-inch case provides a useful installation option between shorter and longer 330707 configurations. It allows the probe geometry to be matched more precisely to the available mounting depth.
Proven 11 mm Sensing Platform
The larger 11 mm probe tip provides a longer linear range than the standard 3300 XL 8 mm system, making it a strong choice for displacement measurements requiring additional range.
Standard 5/8-18 UNF Thread
The 5/8-18 UNF thread is suitable for compatible imperial mounting arrangements and provides a clearly defined mechanical interface.
Non-Contact Measurement
Eddy-current sensing operates without physical contact with the rotating shaft. This reduces mechanical wear at the measurement interface and allows continuous monitoring.
1 m Integral Cable
The 1.0 m cable provides a compact probe assembly for installations where the Proximitor Sensor is located relatively close to the measurement point.
ClickLoc Connection
The miniature coaxial ClickLoc connector offers a practical connection interface for compatible 3300 XL system components.
Unarmored Construction
The absence of armor provides a straightforward, lightweight configuration for installations where additional mechanical cable protection is not required.
Broad Monitoring Capability
One 3300 XL 11 mm system can support a range of measurements, including radial vibration, radial position, axial position, Keyphasor, tachometer, and zero-speed applications.
Straightforward Replacement Matching
For maintenance teams, the complete ordering code provides a convenient way to identify the required case length, cable length, connector, thread, and approval configuration, helping avoid incorrect substitutions.
Technical FAQs
1. What is the Bently Nevada 330707-00-30-10-02-00?
It is a 3300 XL 11 mm standard-mount proximity probe with a 5/8-18 UNF thread, 3.0-inch case, 1.0 m cable, standard ClickLoc connector, and no required agency approval.
2. Is the 330707 an armored probe?
No. The 330707 is the unarmored 5/8-18 UNF version. The corresponding armored 5/8-18 UNF family is 330708.
3. What does the first 00 after 330707 mean?
The first 00 specifies an unthreaded length of 0.0 inch. Bently Nevada's ordering structure allows unthreaded length to be selected in 0.1-inch increments.
4. What does the 30 indicate?
The 30 specifies a 3.0-inch overall case length, equivalent to approximately 76.2 mm.
5. How long is the cable?
The 10 option specifies 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. Does this model include a connector protector?
No. The 02 configuration is the standard ClickLoc connector arrangement without the connector-protector option. The connector-protector version uses a different ordering code.
8. 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).
9. What is the operating frequency range?
The 3300 XL 11 mm transducer is designed for position or vibration measurements over approximately 0 to 8 kHz.
10. Can the 330707-00-30-10-02-00 replace a 330704?
Not as a direct mechanical replacement. The 330707 uses a 5/8-18 UNF thread and is unarmored, while the 330704 uses an M14 x 1.5 metric thread and armor. The mounting thread, case length, cable arrangement, and physical installation must be checked before substitution.
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