The 550 is designed to offer an unrivalled approach to measuring uncured powder thicknesses - without touching the powder. It is designed provide the correct value of the cured film thickness by the measurement of the uncured powder thickness - enabling the application system (powder guns, line speed, etc) to be set up and fine tuned. The 550 is a coating thickness gauge that uses unique ultrasonic technology to measure uncured powder coatings without contacting the surface and predicts the final thickness of the coating after cure. The gauge has been designed for measuring the thickness of uncured powder coatings on smooth flat or curved metallic surfaces such as steel, aluminium, etc. The shrinkage that occurs when the powder cures in the oven is allowed for in the calibration of the gauge and the thickness displayed is the final coating thickness after cure.