Product Overview

The Bently Nevada 330104-14-24-10-02-00 is a 3300 XL 8 mm proximity probe used for non-contact measurement of shaft vibration and relative displacement in rotating machinery. It uses eddy-current sensing to detect changes in the gap between the probe tip and a conductive target. When connected to a compatible extension cable and Proximitor sensor, it forms part of a transducer system used for continuous machinery monitoring.

This model belongs to the 330104 family, which features an M10 × 1 metric mounting thread and an armored cable. Its ordering code specifies a 140 mm unthreaded section, a 240 mm overall case length, a 1-meter total cable length, and a miniature coaxial ClickLoc connector with standard cable construction. The connector option does not include a separate connector protector, and the approval code indicates that no additional agency approval option is specified.

The extended unthreaded section is relevant when the probe must be positioned through a mounting arrangement that requires a particular reach before the threaded portion engages. During selection, engineers need to confirm that the available mounting depth, thread engagement, and adjustment range are suitable for the machine. The case configuration must also allow the sensing tip to reach the intended shaft surface while maintaining the correct operating gap.

The 3300 XL 8 mm proximity transducer system has a nominal linear measurement range of 2 mm and a scale factor of 7.87 V/mm (200 mV/mil). It is commonly used for relative shaft vibration and position measurements in machinery fitted with fluid-film bearings. These measurements help operators monitor changes in rotor behavior and evaluate machine condition over time.

In a centrifugal compressor, for example, probes mounted near bearing locations measure shaft movement as the machine accelerates, operates under changing process loads, and approaches shutdown. The monitoring system evaluates the resulting signals for vibration trends and shaft-position changes. Similar measurement arrangements are used on steam turbines, industrial pumps, generators, and other rotating equipment.

The armored cable provides additional mechanical protection against abrasion and contact with nearby structures. It is useful in installations where the cable passes through confined machinery spaces, but it does not eliminate the need for careful routing and strain control. Because this configuration does not include a connector protector, the exposed connection must also be handled and installed according to the applicable procedures.

The probe is not a standalone vibration monitor. Its output depends on a compatible 3300 XL 8 mm extension cable, Proximitor sensor, and monitoring channel. The specified cable configuration must be matched to the intended transducer system to maintain the required electrical response and measurement sensitivity.

Technical Specifications

Product Features

• 8 mm sensing tip: Supports non-contact shaft-displacement measurements within the 3300 XL 8 mm transducer system.
• M10 × 1 metric mounting thread: Fits compatible metric probe holders and mounting provisions.
• 140 mm unthreaded section: Defines the specified unthreaded portion of the probe body for mounting and positioning.
• 240 mm overall case length: Establishes the case configuration required for installation planning.
• Armored cable construction: Adds protection against mechanical abrasion and contact with nearby equipment.
• 1-meter cable configuration: Supports installations using the corresponding 1-meter transducer arrangement.
• ClickLoc connector: Provides a locking coaxial electrical connection for the probe circuit.
• Standard cable option: Identifies the specified cable construction for this ordering configuration.
• Connector without protector: Matches the selected connector option and requires appropriate handling during installation.
• 2 mm nominal linear range: Supports displacement measurements within the specified linear operating region.
• 7.87 V/mm nominal scale factor: Defines the intended output sensitivity of a compatible transducer system.
• Non-contact measurement: Detects shaft movement without touching the rotating target.
• Machinery monitoring integration: Supplies displacement-related signals to compatible monitoring equipment.

Working Principle

The 330104-14-24-10-02-00 uses eddy-current sensing to measure the distance between its probe tip and a conductive target, typically a rotating shaft. An energized transducer circuit produces an electromagnetic field that interacts with the target surface. As the gap changes, the electrical response of the circuit changes, allowing a compatible Proximitor sensor to generate an output related to displacement.

Rotating Shaft → 3300 XL 8 mm Probe → Extension Cable → Proximitor Sensor → Monitoring Channel

When the shaft moves toward or away from the probe, the measured gap changes. The Proximitor sensor conditions the electrical response, and the monitoring channel processes the resulting output to determine relative shaft vibration or position.

The nominal linear measurement range is 2 mm, with a scale factor of 7.87 V/mm (200 mV/mil). These values apply to a correctly configured 3300 XL 8 mm transducer system operating within its specified conditions. The probe gap must be established during installation so that the shaft movement remains within the usable linear region.

The 140 mm unthreaded section and 240 mm case configuration affect how the probe fits into the mounting arrangement. The installation must provide adequate clearance, correct thread engagement, and sufficient adjustment to position the sensing tip at the required gap. The probe should not be selected solely by comparing the mounting thread, because the case and unthreaded-length options also affect physical compatibility.

The 1-meter cable option is part of the transducer’s electrical configuration. The extension cable and Proximitor sensor must be selected to match the intended system arrangement. A physically compatible connector does not, by itself, establish electrical compatibility.

The armored cable helps protect the lead from mechanical contact, while the ClickLoc connector provides a locking connection. The connector option on this model does not include a separate protector, so the connection should be handled carefully and routed to avoid strain, contamination, or accidental impact.

The probe measures shaft movement relative to its mounting point. If the probe holder loosens or the surrounding structure moves, the output may be affected by movement of the sensing assembly. When a measurement changes unexpectedly, technicians should check the probe gap, mounting stability, cable condition, connector, and signal-conditioning equipment before concluding that the shaft has developed a mechanical problem.

Role in a 3300 XL Machinery Monitoring System

The Bently Nevada 330104-14-24-10-02-00 provides the local shaft-displacement signal used by a compatible 3300 XL monitoring system. It is installed at the designated measurement location and connected to the appropriate extension cable and Proximitor sensor.

Shaft Surface → 3300 XL 8 mm Probe → Extension Cable → Proximitor Sensor → Monitoring Module → Operator Interface

Industrial Applications

Installation and Maintenance

1. Confirm the mounting provision: Verify that the installation accepts the M10 × 1 thread and accommodates the specified case and unthreaded-length configuration.
2. Inspect the target surface: Ensure that the shaft surface is conductive and suitable for eddy-current proximity measurement.
3. Check the installation depth: Confirm that the mounting arrangement provides sufficient clearance and adjustment for the 140 mm unthreaded section and the specified case configuration.
4. Position the probe: Align the sensing tip with the intended shaft measurement location and ensure that adjacent structures do not obstruct installation.
5. Set the initial probe gap: Establish the operating gap according to the applicable 3300 XL 8 mm installation procedure and monitoring-channel requirements.
6. Secure the mounting hardware: Tighten the probe and locking arrangement according to the applicable instructions to prevent movement during machine operation.
7. Inspect the armored cable: Check the armor and outer jacket for crushing, abrasion, sharp bends, or other mechanical damage.
8. Route the cable correctly: Maintain the specified bend radius and avoid excessive tension, crushing, and contact with moving machinery.
9. Connect the extension cable: Use a compatible 3300 XL 8 mm extension cable appropriate for the complete 1-meter transducer configuration.
10. Secure the ClickLoc connector: Confirm that the connector is fully engaged and locked. Handle the connection carefully because this configuration does not include a separate connector protector.
11. Verify the measurement response: Check that the Proximitor output corresponds to the established probe gap and the monitoring channel’s configured measurement range.
12. Investigate abnormal readings: Check the probe gap, mounting stability, cable condition, connector engagement, extension cable, and Proximitor sensor before attributing unusual readings to a mechanical fault.

Related Components

Recommended Related Models

Key Advantages

• Measures shaft displacement without contact with the rotating target.
• Uses an 8 mm sensing tip and a nominal 2 mm linear measurement range.
• Provides an M10 × 1 metric mounting thread.
• Combines an extended unthreaded section with the specified case configuration.
• Incorporates armored cable and a locking ClickLoc connector.
• Supports integration with compatible 3300 XL extension cables, Proximitor sensors, and monitoring equipment.

Technical FAQs

How should the 140 mm unthreaded section be evaluated before ordering?

The unthreaded-length option defines the portion of the probe case without the mounting thread. It must be considered alongside the overall case configuration and the available mounting depth to ensure that the probe can be installed securely and adjusted to the required measurement gap.

Why does the case configuration matter when replacing an existing probe?

The case configuration determines how the probe fits into the mounting provision and how far the sensing tip can be positioned relative to the shaft. Matching the M10 × 1 thread alone does not guarantee compatibility if the case or unthreaded-length requirements differ.

Can the 1-meter cable be connected to any 3300 XL Proximitor sensor?

No. The probe, extension cable, and Proximitor sensor must form a compatible transducer system. The cable configuration affects the electrical characteristics of the circuit, so the correct system combination should be confirmed before installation.

What should be checked if the probe output fluctuates while the machine is running?

Inspect the probe mounting, initial gap, cable routing, connector engagement, and extension cable. Also verify the Proximitor sensor and monitoring-channel configuration. These checks help determine whether the fluctuation originates in the measurement circuit or reflects actual shaft movement.