Coating Thickness gauge WH-81

Uploaded at: September 7th, 2021
  • Features
  • l Thickness measurement using both Magnetic Method to measure the non-magnetic coating on a magnetic metal substrate and Eddy Current Method to measure the non-conductive coating on a
  • non-magnetic metal substrate.
  • l Single-point or two-point method could be used to correct probe system deviation, in order to ensure the accuracy of the device in the process of measuring.
  • l Automatic identify ferrous and non-ferrous substrate quickly.
  • l Power voltage indicator.
  • l Speaker beep while operating.
  • l Power-off automatically when idle; manually power-off available.
  • l Negative display function to ensure the accuracy of zero point calibration.
  • l Showing average, max, min value.
  •  Principle
  • The device uses magnetic thickness measurement method, which non-destructively measures thickness of non-magnetic coating (such as: aluminum, chromium, copper, enamel, rubber, paint, etc.) on magnetic metal substrates (such as steel, iron, alloy and hard magnetic steel, etc.).
  • Magnetic Method (F-type probe)
  • When the probe contacts the cover layer, the probe and magnetic substrate forms a closed magnetic circuit; Due to the presence of non-magnetic coating, magnetic resistance changes. The thickness of the cover layer can be derived by measuring the change.
  • Eddy Current Method (NF-type probe)
  • When the probe contacts the cover layer, the probe and non-magnetic substrate forms Eddy Current and gives feedback to the coil inside the probe.
  • The thickness of the cover layer can be derived by measuring the feedback.

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