• Extech CG204  Coating Thickness Tester

Automatic recognition of ferrous and non-ferrous substrates

The CG204 is a portable meter designed for noninvasive coating thickness measurements. The tester uses dual technology that provides automatic recognition of ferrous (magnetic induction measurement) and non-ferrous (eddy current measurement) substrates. Featuring two measuring modes: Single and Continuous, 400 reading memory storage and user-programmable high/low alarms. Comes with two AAA batteries, USB cable, software, calibration iron, calibration aluminum, precision standards, pouch case, and user manual.


  • Automatic substrate recognition
  • Magnetic induction for ferrous substrates
  • Eddy current measurement for non-ferrous substrates
  • Easy-to use menu system
  • Two measuring modes: Single and Continuous
  • Two working modes: Direct and Group
  • Memory stores 400 readings: 80 Direct and 320 Group
  • User-programmable high/low alarms
  • Min/Max/Average, one or two point calibration
  • Complete with two AAA batteries, USB cable, software, Calibration Iron, Calibration Aluminum, Precision Standards, and pouch case


Specifications                                      Range
Sensor Probe                                   Ferrous
Working Principle                            Magnetic Induction
Measuring Range                            0 to 1250μm
                                                            0 to 49mils
Basic Accuracy                                 ±3%
Resolution                                        0.1μm (0.004mils)
Minimum Curvature Radius          1.5mm (59.06mils)
Minimum Diameter                       7mm (275.6mils)
Minimum Thickness                       0.5mm (19.69mils)
Dimensions                                      4.7 x 2.4 x 1.25" (120 x 62 x 32m
Weight                                              6.17oz (175g)


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Download Users Manual

Extech CG204 Coating Thickness Tester