TheEmerson epro PR6426/00represents the high-range end of the eddy current sensor family. Featuring a large 20mm tip diameter, this sensor is designed for applications requiring a massive linear measurement range that standard 8mm or 12mm probes cannot handle. It is the definitive choice for monitoring differential expansion and extreme axial shifts in the world's largest steam turbines and generators. We supply this unit as 100% Brand New and Original equipment.
Part Number Breakdown
PR6426: Series designation for 20mm tip diameter sensors (Extra-Extended Range).
/00: Standard configuration, typically signifying a 1.0-meter integrated cable without external armoring and a standard mounting thread.
Technical Specifications
Sensor Tip Diameter:20 mm.
Measurement Principle:Non-contact eddy current.
Linear Measuring Range:8.0 mm(typically spanning from 2.0 mm to 10.0 mm gap).
Environmental Rating:IP68; hermetically sealed against high-pressure oil and steam.
Mounting Thread:Typically M20x1.5 or equivalent large-format threading.
Engineering Advantages
The PR6426/00 is engineered for "Extra-Extended Range" (XER). While standard probes monitor vibration, the PR6426 is primarily aposition sensor. Its 20mm tip creates a powerful electromagnetic field capable of tracking a rotor's thermal growth over an 8mm span with sub-micron resolution. This is vital for large-frame turbines where the rotor can expand several millimeters relative to the casing during startup. Its non-contact nature ensures that even at these high ranges, there is no mechanical friction or wear, providing a reliable safety interlock for decades of operation.
