Technical Specifications

FAQ

1. What is the primary function of the Bently Nevada 21504-00-08-10-02 probe?

This probe is designed for proximity measurement in rotating machinery condition monitoring systems. It is used to detect shaft vibration, axial position, and displacement relative to the probe tip. By generating a proportional electrical signal based on the distance to a conductive target, it enables accurate monitoring of machine dynamics in turbines, compressors, pumps, and other critical rotating equipment.

2. How does the eddy current measurement principle work in this probe?

The probe operates using the eddy current principle, where a high-frequency electromagnetic field is generated at the probe tip. When a conductive target approaches the field, eddy currents are induced in the material, causing changes in the probe’s impedance. These changes are converted into an electrical signal proportional to the distance between the probe and the target surface, enabling precise non-contact measurement.

3. What types of machinery is this probe commonly used with?

It is commonly used in industrial rotating equipment such as steam turbines, gas turbines, centrifugal compressors, pumps, motors, and gearboxes. These applications require continuous monitoring of shaft vibration and position to ensure safe operation, detect early mechanical faults, and prevent catastrophic equipment failure.

4. What kind of signals does the probe output?

The probe produces a continuous analog signal that corresponds to the distance between the probe tip and the target surface. This signal is processed by compatible Bently Nevada monitoring systems to generate vibration, displacement, and position readings used for condition monitoring and protection systems.

5. Can this probe operate in harsh industrial environments?

Yes, the probe is designed for industrial environments where it may be exposed to vibration, temperature variations, and electromagnetic interference. Its construction ensures stable signal transmission and measurement reliability in demanding machinery monitoring applications.

6. Does the probe require calibration after installation?

Yes, proper calibration is required when the probe is installed as part of a monitoring system. Calibration ensures that the output signal accurately reflects the physical distance between the probe tip and the target surface, which is essential for precise vibration and position measurement.

7. What systems is this probe compatible with?

It is designed to work with Bently Nevada 7200 series monitoring and protection systems. When integrated correctly, it provides accurate input signals for vibration monitoring modules, enabling real-time condition analysis and machine protection functions.

8. What maintenance considerations are important for this probe?

Maintenance mainly involves ensuring proper mounting stability, cable integrity, and correct alignment with the monitored shaft. Regular inspection is recommended to avoid signal degradation caused by loose connections, contamination, or mechanical misalignment, ensuring long-term measurement reliability.