LZ300 Dual Coating Thickness Gauge

The Original Dual-Substrate Gauge Behind Today’s L600S

The LZ300 was Kett’s original dual-mode pocket coating thickness gauge, measuring across both magnetic and non-magnetic substrates from a single handheld unit. It is no longer manufactured. The information below is provided for owners of existing units and for buyers identifying the current replacement.

What the LZ300 Did

The LZ300 paired an electromagnetic probe for non-magnetic coatings on steel with an eddy current probe for insulating coatings on aluminum, copper, brass, and other non-magnetic metals. Operators selected the probe for the substrate in front of them and worked from one pocket-size unit.

• Two substrates, one gauge: Electromagnetic mode for coatings on ferrous metals and eddy current mode for coatings on non-ferrous metals, covering plated, painted, and lined parts.
• Measurement range: Up to 1,500 µm on ferrous substrates and 800 µm on non-ferrous, covering typical coating and plating 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 LZ300 was the original of the line, followed by the LZ330, LZ370, and LZ373 series. The current production model for all of this work is the L600S. It keeps the dual-substrate measurement that defined the LZ300 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 LZ300 and the entire L3xx coating gauge line.