The Ferrous Field Gauge That Set the Standard for the L600S
The LE330J was Kett’s electromagnetic coating thickness gauge for operators measuring non-magnetic coatings on magnetic substrates. It is no longer manufactured. The information below is provided for owners of existing units and for buyers identifying the current replacement.
What the LE330J Did
The LE330J used an electromagnetic probe to measure the thickness of paint, plating, lining, and other non-magnetic coatings on iron, steel, and other magnetic metals. Operators worked from one handheld unit with a single-contact probe that applied constant pressure for repeatable readings.
- Built for ferrous substrates: Electromagnetic measurement of non-magnetic coatings on steel and iron, covering plated, painted, and lined parts.
- Measurement range: Up to 1,500 µm, covering typical coating and plating work.
- Four application memories: Stored calibration curves for repeated jobs, so an operator could recall a setup without recalibrating.
- Durable fixed-tip probe: Supplied with the fixed-tip LEP30J probe, built for greater durability in repeated production use.
Why the L600S Replaces It
The LE330J followed the LE300 series and was succeeded by the LE370 and LE373. The current production model for all of this work is the L600S. It keeps the ferrous measurement that defined the 330 and adds a wider measurement range, a 2.7 inch full color display, storage for 50,000 records, and USB-C output for modern data transfer.
Looking for the current model? The L600S Coating Thickness Gauge replaces the LE330J and the entire L3xx coating gauge line.

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