Technical Specifications

FAQ

1. What is the main application of the 21505-00-72-10-02 8 mm armored probe?

This probe is widely used for continuous condition monitoring of rotating machinery such as steam turbines, gas turbines, centrifugal compressors, pumps, fans, and gearboxes. It is designed to measure shaft vibration and axial displacement in real time. These measurements are critical for assessing machine health, as even small changes in vibration patterns can indicate early-stage issues such as imbalance, misalignment, bearing wear, or rotor instability. By providing continuous feedback, the probe supports predictive maintenance strategies and helps prevent unexpected equipment failures and costly downtime.

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

The probe operates using the eddy current non-contact measurement principle. A high-frequency electromagnetic field is generated at the probe tip. When this field interacts with a conductive rotating shaft, eddy currents are induced on the shaft surface. As the distance between the probe and the shaft changes due to vibration or axial movement, the eddy current intensity changes accordingly. This variation is converted into an electrical signal proportional to displacement. Because there is no physical contact with the shaft, the system provides highly accurate and stable measurements even in high-speed rotating applications.

3. Is this probe suitable for harsh industrial environments?

Yes, the probe is specifically engineered for harsh and demanding industrial environments. Its armored cable construction provides strong mechanical protection against abrasion, vibration, oil exposure, and accidental handling damage. It also offers excellent resistance to electromagnetic interference, which is common in industrial facilities with high-power electrical equipment. This makes it suitable for use in power plants, petrochemical facilities, and heavy manufacturing industries where reliability and durability are essential.

4. What role does this probe play in a machinery protection system?

In a machinery protection system, this probe acts as a primary sensing element that continuously monitors shaft behavior. It provides real-time vibration and displacement data that is analyzed by monitoring systems to evaluate machine condition. If abnormal conditions such as excessive vibration, shaft misalignment, or instability are detected, the system can trigger alarms or automatic shutdowns. This helps prevent severe equipment damage and ensures safe and stable operation of critical industrial assets.

5. How can measurement accuracy and reliability be ensured?

Measurement accuracy depends on correct installation, proper calibration, and stable operating conditions. The probe must be installed with a precisely controlled gap relative to the shaft to ensure it operates within its linear measurement range. The mounting structure should be rigid and free from vibration-induced movement. The measurement area must remain clean and free from oil, dust, or debris that could interfere with the electromagnetic field. Proper system calibration during commissioning is also essential to ensure accurate signal-to-displacement conversion.

6. Can this probe operate continuously in 24/7 monitoring systems?

Yes, this probe is designed for continuous online monitoring and is fully suitable for 24/7 operation in industrial environments. It is built with industrial-grade materials and a robust armored structure that ensures long-term stability under continuous mechanical and environmental stress. It is commonly used in critical machinery applications where uninterrupted monitoring is required to maintain operational safety and reliability.

7. What are the key installation requirements for this probe?

Proper installation is essential for accurate performance. The probe must be positioned at the correct distance from the rotating shaft to ensure it operates within its specified measurement range. The mounting system must be rigid enough to prevent movement or drift during operation. Cable routing should avoid proximity to high-voltage lines or strong electromagnetic sources to minimize signal interference. Proper grounding practices should also be followed, and system calibration must be completed during commissioning.

8. Is this probe compatible with Bently Nevada 7200 series systems?

Yes, it is fully compatible with Bently Nevada 7200 series monitoring systems. It is designed to work with matching proximitor modules and monitoring units as part of a complete machinery protection and condition monitoring solution. Once integrated, it enables real-time vibration monitoring, trend analysis, alarm management, and predictive maintenance functions, making it widely used in critical industrial assets where reliability and safety are essential.