Technical Specifications

FAQ

Q1: What is the main function of the 3300 XL 11 mm proximity probe?
A: This probe measures the distance between its tip and a rotating conductive shaft using eddy current technology. The signal reflects real-time shaft displacement and vibration behavior, which is essential for monitoring turbomachinery such as turbines, compressors, and pumps. It helps detect early mechanical issues like imbalance, misalignment, shaft instability, or bearing wear.

Q2: How does eddy current sensing work?
A: The probe generates a high-frequency electromagnetic field. When a conductive target enters this field, eddy currents are induced, changing the coil impedance. This change is converted into a voltage signal proportional to the gap distance. Because it is non-contact, it allows precise measurement of very small shaft movements in harsh environments.

Q3: What equipment typically uses this probe?
A: It is commonly used in steam turbines, gas turbines, centrifugal compressors, large pumps, and generators. These machines require continuous monitoring because small mechanical deviations can lead to major failures or downtime.

Q4: Why is installation accuracy important?
A: The probe must operate within a defined linear range relative to the shaft. Incorrect positioning can cause signal distortion or inaccurate readings. A rigid mounting structure is also necessary to prevent vibration interference and ensure stable long-term performance.

Q5: What does the proximitor module do?
A: The probe only generates a raw signal. The proximitor module powers the system, processes the signal, and converts it into engineering values such as displacement or vibration amplitude. It is essential for full system operation.

Q6: What faults can it detect?
A: It can detect rotor imbalance, misalignment, bearing wear, shaft bowing, mechanical looseness, and rubbing conditions. Continuous monitoring helps identify abnormal trends early and prevents equipment damage.

Q7: How does temperature affect operation?
A: Temperature changes can influence signal stability and mechanical clearances due to thermal expansion. Proper installation and environmental control help maintain consistent performance in industrial conditions.

Q8: What maintenance is required?
A: Maintenance is minimal. Regular checks ensure the probe remains securely mounted and correctly aligned. Cable condition should be inspected, and calibration verification may be performed during planned shutdowns to maintain accuracy.