Coating Thickness Gauge

What is Coating Thickness Gauge

Coating thickness GaugeA coating thickness gauge is a device use to measure the thickness of dry film, paint, rust, or any other material being applied. As a secondary layer to a metal and also non metal surface.

Coating thickness gauge or dry film thickness gauge (DFT). Is an important variable that plays a role in product quality, process, and also cost control. Measurement of film thickness can be accomplishing by selecting the best mil gauge for the particular application.

Coating thickness gauges are primarily used to ensure efficient application and also cost optimization of corrosion prevention substance layers. They help determine the expectation life, quality, durability and also performance of the protective layer.

Why Coating Thickness Gauge is Important?

Coating thickness gauge is arguably the single most important measurement. Made during the application and inspection of protective coatings. Coatings are design to perform their intend function when apply within a tight DFT range as specification by the manufacturer. Correct thickness will ensures optimum product performance. Even the most basic specification will require DFT to be measures.

The Measure of Quality.

Regular film thickness measurement helps control material costs, manage application efficiency, maintain finish quality and also ensure compliance with contract specifications either. Paint manufacturers recommend target ranges to achieve optimum performance characteristics and clients expect these parameters to be meet.

See below for more information about relations measurement products and gauges either. (VIDEO)

Principles of Operation of Paint Thickness Gauges.

What are the types of Paint Thickness Gauges available?
DeFelsko offers a variety of paint meters and also probes for a wide range of applications. Including for measuring paint and coatings on metals, non-metals (wood, concrete, plastic, composites), and also for measuring un-cure powder coating thickness.

Check out our selection of paint thickness meters below.

Magnetic Film Thickness Gauges.

Magnetic film gages (paint depth gauges) is use to non-destructively measure the thickness of a nonmagnetic coating on ferrous substrates. Most coatings on steel and iron are measure by this way. Magnetic paint mil gages use one of two principles of operation such as follow : magnetic pull-off or magnetic/electromagnetic induction.

Firstly is Pull Off Coating Thickness Gages.

Magnetic pull-off gauges use a permanent magnet, a calibrate spring, and also graduate scale. The attraction between the magnet and magnetic steel pulls the two together.

The second is Magnetic and Electromagnetic Induction.

Magnetic induction instruments use a permanent magnet as the source of the magnetic field. A Hall-effect generator or magneto-resistor is use to sense the magnetic flux density at a pole of the magnet. Whereas electromagnetic induction instruments use an alternating magnetic field. A soft, ferromagnetic rod wound with a coil of fine wire is use to produce a magnetic field. A second coil of wire is use to detect changes in magnetic flux.

These electronic instruments measure the change in magnetic flux density at the surface of a magnetic probe as it nears a steel surface. The magnitude of the flux density at the probe surface is directly relate to the distance from the steel substrate. By measuring flux density the paint thickness can be determine.

What are Eddy Current Film Thickness Gauges?

Eddy current techniques are uses to non-destructively measure the thickness of non-conductive coatings on nonferrous metal substrates. A coil of fine wire conducting a high-frequency alternating current (above 1 MHz) is uses to set up an alternating magnetic field at the surface of the instrument’s probe. When the probe is brought near a conductive surface, the alternating magnetic field will set up eddy currents on the surface. The substrate characteristics and the distance of the probe from the substrate (the thickness) affect the magnitude of the eddy currents. The eddy currents create their own opposing electromagnetic field that can be senses by the exciting coil or a second, adjacent coil.

Our Coating Thickness gauge products as follow

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