Product Overview

The Bently Nevada 330102-00-70-10-02-00 is a 3300 XL 8 mm Proximity Probe used for non-contact measurement of shaft movement in rotating machinery. It forms part of a proximity measurement system in which the probe senses changes in the distance between its sensing tip and a conductive machine shaft.

The 3300 XL 8 mm probe family is commonly applied to machinery such as steam turbines, gas turbines, compressors, pumps, motors, and generators. Depending on the monitoring channel and machine configuration, the probe can be used for shaft vibration, radial position, axial position, or other measurements based on relative shaft movement.

The probe works with compatible proximity electronics rather than operating as a conventional standalone PLC sensor. Correct probe selection, mounting, target condition, and probe gap are important because the mechanical installation directly affects the resulting proximity signal.

Technical Specifications

Product Features

• Uses the 3300 XL 8 mm proximity probe design for rotating machinery monitoring.
• Provides non-contact detection of conductive shaft movement.
• Uses eddy-current sensing to detect changes in probe-to-target distance.
• Suitable for shaft vibration and position measurement applications.
• Works with compatible Bently Nevada proximity electronics and monitoring systems.
• Applicable to turbines, compressors, pumps, motors, generators, and other rotating machinery.
• Supports continuous machinery condition monitoring and protection applications.

Working Principle

The 330102-00-70-10-02-00 operates by establishing an electromagnetic sensing field between the probe tip and a conductive target, normally the machine shaft. Changes in the distance between the probe and the shaft alter the electrical response of the sensing circuit.

The probe is connected to compatible proximity electronics, which provide the required excitation and convert the probe response into a conditioned output signal for the monitoring system.

The basic measurement path is:

Rotating Shaft → 3300 XL 8 mm Proximity Probe → Proximity Electronics → Monitoring System

When the shaft moves due to vibration, thermal effects, axial movement, or other mechanical conditions, the probe detects the corresponding change in distance. The associated electronics process this change so that the monitoring system can evaluate shaft behavior.

Probe gap, shaft surface condition, mounting rigidity, and compatibility with the associated electronics all influence the quality of the final measurement.

Role in a Bently Nevada 3300 XL Machinery Monitoring Architecture

The 3300 XL 8 mm proximity probe provides the field-level sensing point for non-contact shaft monitoring.

The probe is therefore the first sensing element in the measurement chain, while the downstream electronics and monitoring equipment turn the probe response into usable machinery condition information.

Industrial Applications

• Steam turbine shaft vibration monitoring
• Gas turbine machinery protection
• Centrifugal compressor monitoring
• Industrial pump condition monitoring
• Motor and generator shaft monitoring
• Gearbox and rotating equipment monitoring
• Power generation machinery
• Petrochemical and refining equipment
• Process plant rotating machinery
• Continuous machinery protection and condition monitoring

Installation and Maintenance

1. Verify model compatibility — Confirm that the 330102-00-70-10-02-00 is compatible with the intended 3300 XL proximity monitoring channel and associated electronics.
2. Inspect the probe before installation — Check the probe body, sensing tip, cable, and connector for physical damage or contamination.
3. Confirm the mounting arrangement — Make sure the mounting hardware and probe installation point are suitable for the specific machine.
4. Position the probe correctly — Install the probe so that its sensing tip faces the intended shaft target without contacting the rotating component.
5. Set the probe gap — Establish the required probe-to-target spacing according to the applicable proximity system installation requirements.
6. Inspect the shaft target — Confirm that the monitored shaft surface is suitable for eddy-current proximity measurement and does not have abnormal surface conditions at the measurement point.
7. Secure the probe — Tighten the mounting arrangement properly so that vibration of the machine does not cause independent probe movement.
8. Route the cable carefully — Keep the probe cable away from rotating components, excessive heat, sharp edges, and sources of mechanical stress.
9. Check the electrical connection — Verify that the probe is correctly connected to the associated proximity electronics and that the connection is mechanically secure.
10. Verify the measurement output — Check the resulting proximity signal after installation and compare it with expected machine operating conditions.
11. Monitor for abnormal signal behavior — Sudden changes, excessive noise, unstable output, or unexpected offsets should be investigated for probe, cable, mounting, target, or electronics-related causes.
12. Document replacement work — Record the probe model, monitoring location, associated electronics, installation condition, and maintenance activity for future troubleshooting.

Related Components

• Bently Nevada 3300 XL Proximitor Sensors
• Bently Nevada 3300 XL extension cables
• Bently Nevada 3300 Series monitoring systems
• Proximity probe mounting hardware
• Rotating machinery shaft targets
• Machinery protection systems
• Shaft vibration monitoring channels
• DCS/PLC monitoring interfaces

Recommended Related Models

• Bently Nevada 330102 Series 3300 XL 8 mm Proximity Probes
• Bently Nevada 330101 Series 3300 XL 8 mm Proximity Probes
• Bently Nevada 3300 XL 8 mm Proximitor Sensors
• Bently Nevada 3300 XL Extension Cables
• Bently Nevada 3300 Series Monitoring Systems
• Bently Nevada 3300 XL Proximity Measurement Components

Key Advantages

• Provides non-contact measurement of conductive shaft movement.
• Suitable for continuous rotating machinery monitoring.
• Supports shaft vibration and position measurement applications.
• Integrates with compatible 3300 XL proximity electronics.
• Suitable for turbines, compressors, pumps, motors, and generators.
• Provides a direct sensing point within a machinery protection measurement chain.

Technical FAQs

What does the 8 mm designation mean?

The 8 mm designation identifies the probe size used in the 3300 XL 8 mm proximity probe family. It distinguishes this probe family from other Bently Nevada proximity probe sizes and should be considered when selecting compatible mounting and proximity electronics.

Can the 330102-00-70-10-02-00 connect directly to a PLC input?

The probe is normally used with compatible proximity electronics that condition the probe signal before it reaches a machinery monitoring, protection, DCS, or PLC system. It should not be treated as a conventional direct PLC sensor.

Why is the probe gap important?

The probe-to-shaft gap determines the operating point of the eddy-current measurement system. An incorrect gap can affect the signal level and measurement accuracy, so the installation gap must be established according to the requirements of the associated proximity system.

What should be checked when replacing this probe?

Confirm the probe model and compatibility first. Then verify the mounting arrangement, shaft target condition, probe gap, cable routing, electrical connections, and final measurement signal before placing the monitored machine back into normal service.