Technical Specifications

FAQ

1. What is the main function of this probe in a monitoring system?

This probe is used for continuous, non-contact measurement of shaft vibration and axial displacement in rotating machinery. It provides real-time electrical signals that represent mechanical shaft movement, allowing condition monitoring systems to evaluate machine behavior, detect early-stage mechanical degradation, and support protective shutdown logic when abnormal conditions are detected.

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

The probe operates by generating a high-frequency electromagnetic field at its sensing tip. When a conductive shaft enters this field, eddy currents are induced on the shaft surface. These eddy currents modify the impedance of the probe coil, producing a voltage output that varies proportionally with the distance between the probe and the shaft. This allows precise, non-contact measurement of small shaft movements even in harsh industrial environments.

3. What types of machinery typically use this probe?

This probe is commonly installed on critical rotating equipment such as steam turbines, gas turbines, centrifugal compressors, large industrial pumps, and electric generators. These machines operate under continuous load and high-speed conditions, where small changes in shaft vibration or displacement can indicate early mechanical issues that require immediate attention.

4. What are the key installation requirements for reliable operation?

Proper installation requires precise positioning of the probe relative to the shaft surface with a correctly defined air gap. The probe must be rigidly mounted to prevent movement during operation and aligned accurately with the shaft centerline to avoid measurement errors. The target surface must be clean, smooth, and free of oil, rust, or mechanical damage to ensure stable and accurate signal output.

5. What issues can arise if the probe is installed incorrectly?

Incorrect installation can lead to unstable signals, incorrect vibration readings, increased noise levels, or false alarm conditions. If the air gap is inconsistent or alignment is incorrect, the system may produce distorted or inaccurate data. In severe cases, this may result in failure to detect real mechanical issues, reducing the effectiveness of the monitoring system and increasing operational risk.

6. Is calibration required after installation?

Yes, calibration is required after installation. It ensures that the probe output voltage accurately corresponds to actual shaft displacement. Calibration involves setting reference gap values, configuring system sensitivity, and verifying linear response behavior. Without proper calibration, measurement accuracy may be compromised, leading to incorrect diagnostics or unreliable protection thresholds.

7. How do environmental conditions affect probe performance?

Environmental factors such as temperature fluctuations, oil mist, moisture, electromagnetic interference, and mechanical vibration can all affect signal stability and measurement accuracy. Although the probe is designed for industrial environments, extreme or poorly controlled conditions can degrade performance over time. Proper shielding, stable mounting, and controlled installation conditions help maintain consistent reliability.

8. What maintenance practices help ensure long-term reliability?

Regular inspection of probe mounting stability, cable condition, and connector integrity is essential. Mechanical stress on the probe should be avoided, and contamination from oil or debris should be prevented. Periodic verification of signal quality and system response is recommended to detect early signs of degradation. Consistent preventive maintenance helps extend service life and ensures stable long-term monitoring performance.