© ElektroPhysik
QuintSonic 7
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1 Introduction
1.1 General Remarks
This instruction manual describes how to use the ultrasonic coating thickness measuring system
QuintSonic 7 and provides all necessary information on the manifold application options offered by
the system.
Section 2 provides short instructions along with an operating example. All further sections deal with
the individual subjects. For technical data and general information on care and maintenance,
supply schedule and accessories, please refer to the end of this manual.
1.2 Field of Applications
QuintSonic 7 is an ultrasonic coating thickness measuring system for measuring paint, lacquer and
plastic layers applied on metal, plastic, wood, glass or ceramic. Up to five layers can be measured
non-destructively in one operation. Thanks to the innovative technology, QuintSonic 7 is the first
gauge of its kind to determine exactly the layer thickness applied on components made of GRP or
CRP material. QuintSonic 7 offers a wide range of applications in the automotive industry,
aerospace or any other industrial branch. Additional feature: QuintSonic 7 can also be used for
measuring thin bases through the coating, especially the wall thickness of thin metal sheets
starting from 50 µm.
1.3 Measuring Procedure
The working principle of QuintSonic 7 is based on the reflection of ultrasonic waves at the
interfaces between the individual layers of a coating system. For measurement, a liquid or pasty
couplant is applied on the sample at the point of measurement. The sensor is put on the measuring
spot. The high-frequency ultrasonic sound generator of the sensor head emits an ultrasonic pulse
of a broad bandwidth to travel through sensor head, couplant and finally through the coating
system. At each interface between two layers as well as at the interface to the base, some of the
sonic energy reflects. These portions of pulse
– also referred to as “echoes” – return to the
measuring head at different velocities and the receive signals are registered in the measuring
head. As the time of travel is a function on the sound velocity in the respective material, it can be
used as indicator for the coating thickness. Thickness is calculated according to the time of travel
and sound velocity, transferred to the gauge and shown on display.
Unlike in wall thickness measurement, the layers to be measured with ultrasonic coating thickness
gauges are extremely thin and thus travel times very short, i.e. in the nanoseconds range (a