Bently Nevada 330709-000-240-50-02-00 Proximity Probe — Product Specifications, Applications, Advantages, and Related Models

1. Product Overview

The Bently Nevada 330709-000-240-50-02-00 is specified as a member of the 3300 XL 11 mm proximity probe family. This family is designed for non-contact measurement of shaft displacement and position in industrial machinery monitoring systems.

The probe uses eddy-current sensing technology to detect changes in the distance between its tip and a conductive metal target. When connected to a compatible extension cable and Proximitor Sensor, it forms part of a measurement system that converts changes in the probe-to-target gap into an electrical signal for a suitable monitoring instrument.

These systems are commonly used on rotating machinery where shaft vibration, relative displacement, or axial movement needs to be observed continuously. Typical equipment includes turbines, generators, compressors, pumps, and other industrial machines with compatible mounting arrangements.

The model number indicates a metric-threaded, unarmored probe configuration. However, the 240 case-length code and 50 cable-length code should be verified against the exact ordering documentation before purchase. The 3300 XL 11 mm family uses specific ordering-code rules, and the complete part number should not be assumed to be valid solely because its individual fields resemble familiar options.

The information below distinguishes general 3300 XL 11 mm family characteristics from details that need confirmation for this exact part number.

2. Model Number Breakdown

The complete model number is 330709-000-240-50-02-00. Its ordering-code fields identify the probe construction, unthreaded length, case length, cable length, connector type, and approval option.

Important compatibility note: The 5.0 m configuration is intended for use with the corresponding 5.0 m Proximitor Sensor configuration. It should not be substituted into a system designed for a different electrical cable length without confirming compatibility.

3. Detailed Technical Specifications

The electrical characteristics above describe the 3300 XL 11 mm transducer system under its specified conditions. The probe must be paired with compatible system components to achieve the intended measurement performance.

The 240 mm case-length option is an important mechanical consideration. Before installation, confirm the available mounting depth, probe clearance, thread engagement, and distance from the probe tip to the target. The 5.0 m cable option must also be considered when selecting the compatible Proximitor Sensor.

The stated weight is an estimate for planning purposes, not a guaranteed specification for this exact part number. The actual unit weight and packed shipping weight should be verified separately.

4. Product Introduction

The 330709-000-240-50-02-00 is intended for industrial applications where non-contact measurement of shaft movement is required. The probe is mounted in a fixed position and faces a conductive metal target. It measures changes in the distance between the target and the probe tip without making physical contact with the moving component.

As the target moves, the electrical response of the probe changes. A compatible Proximitor Sensor converts this response into a usable output signal, which can then be supplied to a machinery monitoring instrument.

The probe is part of a complete transducer system rather than a self-contained monitoring device. Its performance depends on the probe, extension cable, Proximitor Sensor, target material, mounting geometry, and setup procedure working together correctly.

The model uses an M16 × 1.5 metric thread and an unarmored construction. Its 240 mm case-length option is intended for installations that require a relatively long case. This may be relevant when the mounting point is separated from the target by a greater distance, but the suitability of the length must be established from the machine’s mechanical design.

The 5.0 m cable option provides a longer cable arrangement than the 1.0 m version. Because cable length forms part of the transducer system’s electrical configuration, it must be matched with the appropriate Proximitor Sensor. A cable should not be selected solely on the basis of physical reach.

When correctly installed and configured, the probe can provide continuous measurement data for shaft vibration, displacement, and selected position-monitoring applications. These measurements can support condition monitoring and help engineers assess changes in machine behavior over time.

5. Product Applications

5.1 Steam Turbines and Gas Turbines

The 3300 XL 11 mm family is used in suitable turbine monitoring installations where non-contact shaft displacement measurements are required.

A probe positioned near the shaft can detect relative movement between the shaft and the stationary machine structure. This information may be used to monitor vibration and selected shaft-position parameters.

The 240 mm case configuration should only be used where the turbine’s probe mounting arrangement requires that length. The installation must provide adequate clearance and allow the probe to be positioned within the required measurement range.

5.2 Generators and Large Rotating Machines

Large generators and other rotating machines may require continuous monitoring of shaft movement. A compatible proximity transducer system can provide measurements that help maintenance personnel observe changes in rotor behavior.

The longer cable option may be useful where the cable route requires additional reach, provided the complete 5.0 m system configuration is maintained.

5.3 Industrial Compressors

Compressors used in process plants and other industrial facilities may employ proximity probes at suitable shaft-monitoring locations.

The system can be used to measure shaft vibration or displacement where the machine design, target geometry, and monitoring arrangement are compatible. Reciprocating compressor applications may require specific rod-position or rod-drop measurement arrangements, so the correct sensing direction and target surface must be confirmed.

5.4 Pumps and Bearing Assemblies

In suitable pump and bearing installations, a proximity probe can measure shaft movement relative to a fixed mounting point.

This is useful in systems where changes in shaft vibration or displacement may indicate a change in operating condition. The probe should be mounted according to the machine drawing and adjusted to the specified gap.

5.5 Axial Position and Thrust Monitoring

Proximity probes can be installed to measure axial displacement when facing a suitable thrust collar or other target surface.

Such measurements may help identify changes in rotor position and provide information about the behavior of thrust-bearing assemblies. The specific probe orientation and monitoring channel must be designed for the intended measurement.

5.6 Differential Expansion Monitoring

Some turbine monitoring systems use proximity probes to measure movement associated with differential expansion. In these applications, the probe observes a suitable target or ramp arrangement, and the measured movement is interpreted according to the machine’s design.

The suitability of the 330709-000-240-50-02-00 depends on the required sensing geometry, case length, system compatibility, and the measurement range required for the application.

5.7 Industrial Power Generation

Power plants use continuous condition monitoring to observe critical rotating equipment. The 3300 XL 11 mm family can support selected shaft vibration and position measurements when installed as part of a compatible system.

The probe is one component of the overall measurement chain. The cable, Proximitor Sensor, monitor, and installation procedure must all be appropriate for the application.

5.8 Petrochemical and Process Industries

Industrial process facilities often operate pumps, compressors, and other rotating machinery for extended periods. Non-contact displacement measurements can provide useful data for routine monitoring and maintenance planning.

The probe should be evaluated for its intended environment, particularly where temperature, moisture, chemical exposure, or hazardous-area requirements are relevant.

5.9 Preventive and Predictive Maintenance

The probe’s output can contribute to a condition-monitoring program by providing data for trend analysis. Engineers can compare current readings with established baselines and other machine measurements to identify changes that require further investigation.

The probe does not independently diagnose every machine fault. Its value lies in providing repeatable displacement measurements as part of a broader monitoring and maintenance strategy.

6. Product Advantages

6.1 Non-Contact Measurement

The probe measures the gap between itself and a conductive target without physical contact. This makes it suitable for continuous monitoring of rotating components where contact-based measurement would be inappropriate.

6.2 Nominal 4.0 mm Linear Range

The matched 3300 XL 11 mm transducer system has a nominal 4.0 mm linear range under specified conditions. This provides a useful displacement measurement interval for compatible industrial applications.

6.3 Long Case-Length Configuration

The 240 mm case option may suit installations that require a longer probe case to reach the intended sensing location.

This advantage is application-specific. The correct case length must be determined from the machine’s mounting design, required clearance, and probe adjustment range.

6.4 Extended Cable Reach

The 5.0 m cable option provides more physical reach than the 1.0 m configuration. This may simplify routing in installations where the distance between the probe and associated equipment requires a longer cable.

However, the 5.0 m cable option must be used with the corresponding compatible Proximitor Sensor arrangement. Cable length is an electrical as well as a mechanical selection parameter.

6.5 Metric Threaded Mounting

The M16 × 1.5 thread provides a standardized metric mounting interface. It is suitable for machine ports and brackets designed for that thread specification.

Thread compatibility should always be confirmed before replacement. Similar probe families may have different mounting dimensions or electrical characteristics.

6.6 Stainless Steel Case

The stainless steel case provides a robust housing for industrial installation. Its suitability for specific environments depends on the actual temperature, chemical exposure, moisture, and other local conditions.

6.7 Defined Connector Interface

The miniature coaxial ClickLoc connector provides a defined interface for the matching transducer components. Correct connection and cable routing help maintain signal continuity.

6.8 Continuous Monitoring Capability

When integrated with a compatible Proximitor Sensor and monitoring equipment, the probe can provide a continuous signal representing shaft displacement. This allows readings to be recorded and compared over time.

6.9 Support for Maintenance Planning

Consistent measurements can help maintenance teams identify changes from normal machine behavior and prioritize further inspection. This supports condition-based maintenance when used alongside other relevant machine data.

7. Brand and Product Series

The 3300 XL 11 mm family is designed to provide non-contact displacement measurements as part of a complete transducer system. Models within the family may share the same sensing principle but differ in mounting thread, case length, cable length, armor, and connector configuration.

The 330709 model is the unarmored M16 × 1.5 version. Its 240 mm case and 5.0 m cable options make the mechanical and electrical compatibility checks especially important when selecting a replacement.

8. Five Related Models in the Same Series

The following models are related 3300 XL 11 mm probes or supporting components. Their configurations and functions differ, so they should not be treated as interchangeable without a compatibility check.

Related Model Notes

• 330709-000-200-50-02-00 may be considered where a 200 mm case is required.

• 330709-000-220-50-02-00 provides a shorter case option than the specified 240 mm configuration.

• 330709-000-240-50-02-00 is the requested model and should be treated as the reference configuration.

• 330710-000-240-50-02-00 represents the armored version of the same general metric-thread probe family; its complete ordering configuration must be verified before purchase.

• 330730 is an extension cable, not a complete proximity probe. It must match the intended transducer system.

The alternative case-length codes listed above are examples of potential comparison configurations, not confirmation that every complete part number is available or valid for ordering. Verify each complete ordering code before purchase. Exact unit weights and shipping dimensions should be obtained for the actual supplied parts.

9. Five Related Models from the Same Brand

The following products serve different functions within industrial machinery monitoring. They are useful when reviewing a broader system but are not direct substitutes for the 330709 proximity probe.

These products perform different jobs within a machinery monitoring installation.

The Proximitor Sensor processes the probe’s sensing response. The extension cable connects the probe to the sensor. The monitoring module processes supported measurement signals, while the data-interface module serves a separate communication and data-handling function.

A complete installation should be designed around compatible components rather than selecting products solely because they belong to the same brand.

10. Installation and Commissioning Considerations

10.1 Confirm the Mounting Thread

The probe uses an M16 × 1.5 metric thread. Confirm that the machine mounting port has the correct thread and that the available engagement depth is appropriate.

Do not force the probe into an incompatible port or alter the mounting arrangement without engineering approval.

10.2 Check the 240 mm Case Length

The case length should be compared with the machine’s mechanical drawing. Check the mounting depth, available clearance, probe-tip location, and access for installation.

The probe must be able to reach the intended sensing location without interfering with the target or other machine components.

10.3 Confirm the 5.0 m Cable Configuration

The 5.0 m cable option is a key part of this model’s configuration. Verify that the Proximitor Sensor is suitable for the corresponding 5.0 m transducer arrangement.

Do not assume that a 1.0 m sensor configuration can be used without checking the complete electrical specification.

10.4 Set the Probe Gap Correctly

The gap must be adjusted according to the applicable system installation instructions. A nominal gap around 2.5 mm is typical for the system, but the final setting should be verified for the actual configuration.

Incorrect gap adjustment can reduce the available linear measurement range or result in an inaccurate signal.

10.5 Protect the Cable

Route the standard cable away from sharp edges, crushing points, excessive tension, and tight bends. Maintain the specified bend radius and ensure that the connector is clean and securely fitted.

Because the probe is unarmored, the installation should provide suitable cable routing and external protection where required.

10.6 Verify Target Geometry

Confirm the target material, diameter, surface condition, and position relative to the probe. Target geometry can influence the measurement response and the usable linear range.

10.7 Check Environmental Conditions

Confirm that the probe, cable, connector, and Proximitor Sensor are suitable for the actual operating temperature and environmental conditions.

If the application requires specific hazardous-area approvals, verify that the complete selected configuration meets those requirements. The 00 option should not be interpreted as an approval certification.

10.8 Complete Functional Verification

After installation, check the model number, mechanical position, gap setting, cable arrangement, and monitoring channel configuration. Perform the appropriate functional checks before returning the machine to service.

11. Purchasing Checklist

12. Final Summary

The Bently Nevada 330709-000-240-50-02-00 is identified as an unarmored, M16 × 1.5 metric-threaded proximity probe in the 3300 XL 11 mm family. Its model-code configuration indicates a 240 mm case-length option, a 5.0 m cable-length option, a miniature coaxial ClickLoc connector, standard cable, and no additional agency approval option selected.

Its principal application is non-contact measurement of displacement and position on suitable conductive targets. When installed with the compatible cable, Proximitor Sensor, and monitoring equipment, it can support shaft vibration, axial position, and other appropriate machinery monitoring measurements.

The main selection considerations are the long case length, the 5.0 m electrical cable configuration, the metric mounting thread, the target geometry, and the compatibility of the complete transducer system.

Before ordering, verify that the full model number is a valid configuration for the required application. Confirm the exact mechanical drawing, compatible 5.0 m Proximitor Sensor arrangement, actual unit weight, and shipping dimensions rather than relying on estimates alone.