Product Core Brief
- Model: PR6422/012-010
- Brand: Emerson (EPRO)
- Series: PR6422 Displacement Sensors
- Core Function: Non-contact measurement of shaft vibration, axial position, and eccentricity in high-speed rotating machinery.
- Type: Eddy Current Proximity Probe
- Key Specs: 10 mm tip diameter, static and dynamic displacement measurement.
- Condition: New Original (New Surplus), not refurbished
Product Introduction
The PR6422/012-010 EMERSON is a critical component for machinery protection systems (MPS) used in power plants and petrochemical facilities. By utilizing the eddy current principle, this sensor measures the minute gap between the probe tip and the rotating shaft without physical contact, allowing for the detection of shaft vibration or axial “float” that could indicate bearing failure or rotor instability.
In my experience with turbine overhauls, the PR6422/012-010 EMERSON is favored for its extreme durability against oil, steam, and chemical exposure. It is a passive device that must be paired with a compatible signal converter (driver) to translate the gap distance into a proportional voltage or 4–20 mA signal. When replacing these, accuracy depends entirely on the “system length”—ensure the cable length of the new probe matches the original to maintain the factory calibration curve.
