Extech CG204
Coating Thickness Tester

  • 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
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Extech CG204 Shown

Product Information
Datasheet 479 KB PDF
Manual 554 KB PDF
PDF HelpPDF Help

Extech CG204 Coating Thickness Tester is a portable meter designed for non-invasive coating thickness measurements. The CG204 uses two measurement methods: magnetic induction (for ferrous metal substrates) and eddy current (for non-ferrous metal substrates). The meter is easily configured using the intuitive push-button programming menu. Five film reference samples and two metal substrates are provided. The meter is also equipped with a USB PC interface port and PC software.

Specification CG204
Sensor Probe Ferrous Non-Ferrous
Working Principle Magnetic Induction Eddy Current
Measuring Range 0 to 1250μm
0 to 49mils
0 to 1250μm
0 to 49mils
Basic Accuracy ±3% ±3%
Resolution 0.1μm (0.004mils) 0.1μm (0.004mils)
Minimum Curvature Radius 1.5mm (59.06mils) 3mm (118.1mils)
Minimum Diameter 7mm (275.6mils) 5mm (196.9mils)
Minimum Thickness 0.5mm (19.69mils) 0.3mm (11.81mils)
Dimensions 4.7 x 2.4 x 1.25" (120 x 62 x 32mm)
Weight 6.17oz (175g)
Ordering Information
Model Description Buy Online Price
CG204 Extech CG204 Coating Thickness Tester Buy Now $199.99
Included Accessories
  • 2 AAA batteries,
  • 1 USB cable
  • 1 Software
  • 1 Calibration Iron
  • 1 Calibration Aluminum
  • 1 Precision Standards
  • 1 Pouch case
  • 1 Software
  • 1 Manual
Optional Accessories
CG204-REF Extech CG204-REF Replacement Reference Films for CG204 Coating Thickness Tester Buy Now Sale $39.14
(Reg. $44.99)
Other Options
CG304 Extech CG304 Coating Thickness Tester for Ferrous and Non-Ferrous Substrates with Bluetooth Buy Now $249.99

*NOTE: Items ordered with optional NIST calibration will require
approximately 10 days to complete the certification.