The Erichsen Paint Borer 518 MC Coating Thickness Gauge is a compact instrument having all the principal components; drilling device, measuring microscope, specimen illumination and the battery enclosed in a sturdy housing. A slide moving on horizontal slide-ways houses the drill and microscope and gives the PAINT BORER 518 MC the unique advantage of not having to be moved for measurement after drilling. The Erichsen Paint Borer 518 MC Coating Thickness Gauge is the wedge cut method in which the specimen is cut at a defined angle. From the projected width of the cut face the layer thickness can be calculated using a simple geometrical relationship. The Model 518 MC limits damage to the coating to a small conical hole as illustrated in the sectional view. The measuring microscope displays a system of concentric circles and from the difference in the radii the film thickness can be calculated by multiplying with a known factor
