The Bently Nevada 21504 is an 8 mm standard proximity probe with 3/8-24 threads. It features a PPS tip, operates with the 7200 system, and offers an 80 mil linear range for reliable noncontacting displacement measurement.
Specifications
Model: 21504-000-020-05-02 (8 mm Standard Probe)
Tip Construction: Standard
Case Thread: 3/8-24
Calibrated Range: 80 mils (2.0 mm)
Scale Factor: 200 mV/mil (7.87 V/mm) when calibrated as a system
Linearity: Within 0.8 mils (0.02 mm) of a straight line (system calibrated)
Frequency Response: 0 to 10 kHz (0 to 600,000 cpm)
System Length: 5 metres (probe and extension cable combined)
Dimensions:1.6x1.3x69cm
Weight:0.05kg
Application
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Radial Vibration: Used to indicate bearing condition and detect machine malfunctions such as rotor imbalance and misalignment.
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Axial Thrust Position: Monitors thrust bearing wear or potential bearing failure by measuring axial position.
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Shaft Average Radial Position: Determines the attitude angle, which serves as an indicator of rotor stability.
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Vibration Amplitude & Phase Angle: Collects diagnostic information for analysis in Polar and Bode formats.
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Eccentricity: Measures the amount of rotor bow in rotating machinery.



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