Subscribe to our newsletter

Extech CG304: Coating Thickness Tester with Bluetooth®

Measures the thickness of ferrous and non-ferrous substrates

View Datasheet > CG304


The CG304 Coating Thickness Tester offers a non-destructive way of measuring the thickness of ferrous and non-ferrous substrates with automatic recognition of the material being measured. Memory stores 2500 readings. The unique Bluetooth interface feature wirelessly transmits data to your PC for further analysis and enables you to generate a documented report. Special LCD with backlight feature and contrast for easy viewing in various lighting conditions. Complete with two AAA batteries, software, hard case, Steel and Aluminum substrates and standard films for calibration.

Additional information

Measuring Range

Ferrous: 0 to 2000µm; 0 to 78.7mils Non-Ferrous: 0 to 2000µm; 0 to 78.7mils


Ferrous: ±(2%+2µm); ±3.5% (1000 to 2000µm) Non-Ferrous: ±(2%+2µm); ±3.5% (1000 to 2000µm)


Ferrous: 0.1µm (0.01mils) Non-Ferrous: 0.1µm (0.01mils)

Minimum Curvature Radius

Ferrous: 1.5mm (59.06mils) Non-Ferrous: 3mm (118.1mils)

Minimum Diameter

Ferrous: 7mm (275.6mils) Non-Ferrous: 5mm (196.9mils)

Dimensions /Weight

4.7×2.4×1.25" (120x62x32mm)/6.17oz (175g)

Please leave your details below so we can get in touch with you.

Contact Info