Product Overview

The Bently Nevada 330104-00-09-10-01-00 is a 3300 XL 8 mm proximity probe used for non-contact measurement of shaft vibration and relative displacement in rotating machinery. It belongs to the metric-mount 3300 XL 8 mm probe family and uses eddy-current sensing to detect changes in the distance between the probe tip and a conductive shaft surface.

This model combines an M10 × 1 mounting thread with an armored cable construction. The ordering configuration specifies a 90 mm overall case length, a 1-meter integral cable, and a miniature coaxial ClickLoc connector with a connector protector. These features determine how the probe is installed, connected, and protected within the machinery measurement arrangement.

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 to measure relative shaft vibration and position in machines fitted with fluid-film bearings. Depending on the monitoring configuration, proximity signals can also support Keyphasor reference and rotational speed measurements.

In a centrifugal compressor, for example, probes mounted near bearing locations detect changes in shaft position as the machine accelerates, decelerates, or operates under varying process loads. The monitoring system processes these signals to track vibration trends and identify departures from established operating conditions. Similar arrangements are used in turbines, industrial pumps, generators, and other rotating equipment.

The armored cable helps protect the probe lead from abrasion and mechanical contact, while the connector protector provides additional protection at the connection end. Neither feature eliminates the need for proper cable routing, suitable mounting hardware, and careful handling during installation.

The probe is one component of a complete measurement circuit. A compatible 3300 XL 8 mm extension cable and Proximitor sensor are required to condition the signal for the receiving monitoring channel. The integral cable length and associated transducer components must be selected according to the intended system configuration rather than treated as interchangeable cable options.

Technical Specifications

Product Features

• 8 mm sensing tip: Supports non-contact shaft-displacement measurements in the 3300 XL 8 mm transducer system.
• M10 × 1 mounting thread: Fits compatible metric probe mounting provisions.
• 90 mm overall case length: Defines the specified probe body configuration for installation planning.
• Armored cable construction: Provides additional protection against mechanical abrasion and contact.
• 1-meter integral cable: Establishes the probe cable length for the selected system configuration.
• ClickLoc connector: Provides a locking coaxial connection for the transducer circuit.
• Connector protector: Helps protect the connector interface in the specified configuration.
• 2 mm linear measurement range: Supports displacement measurement within the specified linear operating region.
• 7.87 V/mm nominal scale factor: Defines the standard output sensitivity of a compatible 3300 XL 8 mm system.
• Non-contact operation: Measures shaft movement without touching the rotating target.
• Monitoring-system integration: Supplies displacement-related signals to compatible Proximitor sensors and monitoring channels.
• Metric mounting configuration: Provides an alternative to the inch-threaded probe variants in the same product family.

Working Principle

The 330104-00-09-10-01-00 uses eddy-current sensing to measure the gap between its probe tip and a conductive target, typically a rotating shaft. The energized probe produces an electromagnetic field that interacts with the target surface. Changes in the probe-to-target distance alter the electrical response of the transducer circuit.

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

As the shaft moves toward or away from the probe, the gap changes. The compatible Proximitor sensor converts the electrical response into an output related to displacement, which the monitoring channel processes for vibration or position measurements.

The nominal scale factor is 7.87 V/mm, equivalent to 200 mV/mil, within the specified linear operating region. The system’s nominal linear range is 2 mm. These values describe the intended relationship between gap changes and output voltage when the probe, extension cable, and Proximitor sensor are correctly matched.

The initial probe gap is established during installation. For the standard 3300 XL 8 mm system, a typical setup uses a gap of approximately 1.27 mm, subject to the applicable installation procedure and monitoring-system requirements. An incorrect gap can reduce the available measurement range or cause the output to fall outside the intended linear region.

The probe’s integral cable is part of the electrical measurement circuit. Its length, the extension cable, and the Proximitor sensor must form a compatible system. Although this model has a 1-meter cable, the extension cable and signal-conditioning equipment still need to be selected according to the specified 3300 XL 8 mm arrangement.

The armored cable protects the lead against mechanical damage, but damage to the cable, connector, or mounting arrangement can still affect the signal. Loose connections, incorrect gap settings, or movement of the probe mounting point may produce unstable readings that resemble changes in shaft vibration.

Role in a 3300 XL Machinery Monitoring System

The 330104-00-09-10-01-00 provides the local displacement measurement used by a compatible 3300 XL 8 mm monitoring arrangement. It is installed near the designated shaft measurement point and connected to the 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 specified M10 × 1 metric thread and accommodates the 90 mm overall case length.
2. Inspect the target surface: Ensure that the shaft surface is conductive and suitable for eddy-current proximity measurement.
3. Check the mounting location: Position the probe at the designated measurement point and align it with the intended shaft surface.
4. Set the initial probe gap: Establish the operating gap according to the 3300 XL 8 mm installation procedure and the receiving monitoring channel’s requirements.
5. Secure the probe: Tighten the mounting and locking hardware according to the applicable instructions to prevent movement during machine operation.
6. Inspect the armored cable: Check the armor, outer jacket, and exposed cable sections for abrasion, crushing, sharp bends, or other mechanical damage.
7. Route the cable carefully: Avoid excessive tension, tight bends, and routing that exposes the cable to moving parts or damaging contact.
8. Connect the extension cable: Use a compatible 3300 XL 8 mm extension cable appropriate for the complete transducer configuration.
9. Secure the ClickLoc connection: Ensure the connector is properly engaged and the connector protector is correctly positioned.
10. Verify the signal response: Confirm that the Proximitor output corresponds to the established gap and the monitoring channel’s configured measurement range.
11. Establish baseline readings: Record initial vibration or position measurements under known operating conditions for future comparison.
12. Investigate abnormal measurements: Check the probe gap, mounting security, armored cable, connector, extension cable, and Proximitor sensor before concluding that the shaft has developed a mechanical fault.

Related Components

Recommended Related Models

Key Advantages

• Supports non-contact shaft-displacement measurement in rotating machinery.
• Uses an 8 mm sensing tip and a nominal 2 mm linear measurement range.
• Provides an M10 × 1 metric mounting thread.
• Incorporates armored cable and a connector protector.
• Uses a ClickLoc connection for the specified transducer arrangement.
• Integrates with compatible 3300 XL 8 mm extension cables, Proximitor sensors, and monitoring equipment.

Technical FAQs

What is the main difference between the 330103 and 330104 probe configurations?

Both belong to the 3300 XL 8 mm metric-mount family and use an M10 × 1 mounting thread. The 330104 configuration includes cable armor, whereas the 330103 configuration uses an unarmored cable. The selection depends on the mechanical protection required by the installation.

What does the 90 mm case-length option mean for installation?

The case-length code specifies the overall probe case configuration. It must be considered when selecting the mounting provision and establishing the probe’s position relative to the shaft. The available adjustment must allow the required measurement gap to be set correctly.

Why does the connector protector matter in this configuration?

The connector protector provides additional protection around the specified ClickLoc connector interface. It helps protect the connection end during installation and operation, but the connector must still be correctly engaged and the cable routed to prevent mechanical strain.

Can this probe be connected directly to a monitoring module?

The probe normally forms part of a complete 3300 XL 8 mm transducer circuit. A compatible extension cable and Proximitor sensor are required to produce the intended conditioned output for the monitoring channel. The probe should not be treated as a standalone signal-processing device.