LH300 Non-Ferrous Coating Thickness Gauge

The Original Non-Ferrous Gauge Behind Today’s L600S

The LH300 was Kett’s original eddy current pocket coating thickness gauge for measuring insulating coatings on non-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 LH300 Did

The LH300 used an eddy current probe to measure the thickness of paint, anodizing, resin, and other insulating coatings on aluminum, copper, brass, and other non-magnetic metals. Operators worked from one pocket-size unit with a single-contact probe that applied constant pressure for repeatable readings.

• Built for non-ferrous substrates: Eddy current measurement of insulating coatings on aluminum, copper, brass, and other non-magnetic metals, including anodized and painted parts.
• Measurement range: Up to 800 µm, covering typical coating and anodizing work.
• Non-volatile calibration memory: Held its calibration through power-off and battery changes, so measurement could resume without recalibrating.
• Simple field operation: Single-contact constant-pressure probe and upper/lower limit alarms for fast, repeatable readings.

Why the L600S Replaces It

The LH300 was the original of the line, followed by the LH330, LH370, and LH373 series. The current production model for all of this work is the L600S. It keeps the non-ferrous measurement that defined the LH300 and adds a wider measurement range, 100 application memories, storage for 50,000 records, a 2.7 inch full color display, and USB-C output.

Looking for the current model? The L600S Coating Thickness Gauge replaces the LH300 and the entire L3xx coating gauge line.