LH370 Non-Ferrous Coating Gauge

Description

The Non-Ferrous Field Gauge That Set the Standard for the L600S

The LH370 was Kett’s eddy current coating thickness gauge for operators 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 LH370 Did

The LH370 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 handheld 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.
Wide measurement range: Up to 1,200 µm, handling heavy coatings as well as thin films.
100 application memories: Stored calibration curves for repeated jobs, so an operator could recall a setup without recalibrating.
On-board data and logging: A backlit dot-matrix display showed date, time, and lot data, with storage for 3,000 measurements and output to a PC for record keeping.

Why the L600S Replaces It

The LH370 followed the LH330 series and was itself succeeded by the LH373, which added expanded data logging. The current production model for all of this work is the L600S. It keeps the non-ferrous measurement that defined the 370 and adds 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 LH370 and the entire L3xx coating gauge line.

Additional information

Weight	2.8 lbs
Dimensions	15 × 9.5 × 2.5 in
Measurement Principle	Eddy current
Measurement Range	0 to 1200 µm (0 to 47.0 mils)
Accuracy	±1 µm under 50 µm; ±2% from 50 to 1000 µm; ±3% at 1000 µm and greater
Resolution	0.1 µm under 100 µm; 1 µm at 100 µm and above
Response Time	Instant
Applications	Insulating coatings on non-magnetic metal
Calibrations	100
Substrate Compatibility	Non-ferrous (aluminum, copper, brass)
Probe Type	LHP30J standard; also accepts LHP30C (single contact point, constant pressure, cabled)
Display	Digital dot-matrix LCD with backlight, on-screen date/time and lot/data display, minimum displayed digit 0.1 µm
Features	16 menu-driven settings incl. calibration-curve selection, substrate and 5-point foil calibration, upper/lower limits, statistics, lot splitting, data memory, date/time, backlight, auto power off
Data Memory Capacity	Approximately 3,000 points
Operating Temperature	0 to 40 °C
Communications	USB or RS-232C (PC); RS-232C (printer); LDL02 data logger software supported
Power	4 x AA alkaline batteries (1.5 V)
Power Consumption	80 mW (backlight off)
Battery Life	Approximately 100 hours continuous (backlight off)
Dimensions	75 (W) × 145 (D) × 31 (H) mm (main unit)
Weight	0.34 kg (0.75 lbs)
Standard Accessories	Aluminum substrate (NFE370), standard calibration foil set (5 pcs), probe adaptor, carrying case, 4 x AA batteries, calibration foil case, operating manual
Options	Calibration foils (thicknesses other than the furnished set), Measuring Stand LW990, VZ330 printer (with printer cable VZC25), PC cable VZC53, RS-232C-USB converter, LDL02 data logger software
Warranty	One Year Total Care Warranty covering parts, labor, and specification compliance. Maintenance Agreements available.

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