Spessimetro a ultrasuoni Progetto PSC

Are you looking for information on how to use your ultrasonic thickness gauge in order to measure in a reliably way the thickness of a given material?
Read on and you will understand how you can use the gauge accurately as our client Project PSC does.

What is an ultrasonic thickness gauge?

An ultrasonic thickness gauge is an electronic device that uses the emission and reception of sound waves to measure the thickness of a given material.
It presents different dimensions and functions.
Each sector requires one type rather than another, therefore it is important to be able to choose the most suitable.

probe thickness gauge

How does the ultrasonic thickness gauge work?

First you got to know what you need to measure. Each material has a different internal sound speed, meaning that sound travels through different materials at different speeds.
This is an essential part of calculating the thickness of a material, because the thickness is equal to the echo cycle time divided by the speed of sound.

To accurately calculate the thickness, the device must know the speed of sound within the material you are measuring.

Since this will be unique to the material itself, it is important to set the device for the material you want to measure.
Let’s look at some of the most common materials and associated internal sound speeds.


Material Speed (m / s)

Aluminium 3040 – 6420

Brick 3600 – 4200

Concrete 3200 – 3700

Copper 3560 – 3900

Glass 3950-5000

Iron 3850 – 5130

Lead 1160 – 1320

Steel 4880-5050

Wood 3300-5000


After setting, the device is ready to measure the sample accurately.

The second step is to determine whether the surface you need to obtain the thickness is obscured by some kind of coating.

What is meant by coating?

Thickness gauge kit

Coating means any material that covers the surface and prevents direct contact between the probe and the surface.

Examples of coatings are::

And many others

If you are using a Single Echo device (such as our SA8812 or SAUT160) these layers that cover the surface will cause a discrepancy in measurements and give you inaccurate results.

In this scenario, it is important to ensure that the surface is clean and that an insulating gel is used to form a clean connection between the probe and the surface.For devices that can use Echo-Echo and Multiple Echo methods (such as our SAUT310D-SW or SAUT500D-SW), coating is a minor problem and can be fixed.

Echo-Echo allows your ultrasonic thickness gauge to ignore a coating up to 8 mm thick. The measurement process includes the device that produces an ultrasonic pulse, which is sent through the material you are measuring.

Timing begins when the pulse is initially emitted by the probe and ends when the return echo is detected, which reverberates through the material after bouncing off the bottom wall.

How do the different measurement methods work?

Single Echo is the simplest and, as the name suggests, uses a single timing to measure thickness. This requires a clean sample of the material, which can be difficult to find in many areas outside of the controlled test environments.

Echo-Echo and Multiple Echo use two and three timers respectively to eliminate the thickness of the coating and obtain an accurate result for the sample thickness.
The second cycle of the sound wave begins at the boundary between the coating and the sample.
This is the key factor to remove the coating from the measurement, because it means that time one and time two will be slightly different.

Multiple Echo has a third timing to use, which increases measurement accuracy when the coating is thicker.
For this, times two and three are usually equal or infinitely different, so that the hardware and computing software can eliminate the coating and record only the thickness of the sample.

PROJECT PSC SRL also uses ultrasonic thickness gauge

Among our numerous customers who use the thickness gauges there is Project PSC Srl that uses the tools branded SAMA Tools for the execution of investigations and professional training in the field of non-destructive controls.
Project PSC ensures a high professionalism, seriousness and efficiency in training, engineering and consulting.

The investigation with the ultrasonic thickness gauge allows to detect both superficial and in depth defects.

PSC Project Courses and Services

Project PSC is therefore a Center that deals with training and certification of personnel involved in the execution of Non-destructive Investigations (CND) under the supervision of Bureau Veritas and ACCREDIA.

training Progetto PSC

“Non Destructive Control is the determination of the physical condition of an object made in such a way as not to compromise the functionalities for which the object itself was built.”

ASNT(American Association For Non Destructive Testing)

Courses are held throughout the Italian territory, even directly at companies, with personalized training plans.

It is also a Testing Laboratory composed of level III technicians who perform preventive (non-destructive and semi-destructive) diagnostic investigations in the field.

So the aim is to detect defects, deficiencies and building diseases, suggesting targeted interventions, allowing a saving of time and money to the customer.

In summary, the activities carried out concern the following areas:


    In the civil and industrial field for the maintenance and control of buildings and plants.


    Non-destructive, semi-destructive and destructive tests for the characterization of materials and the definition of seismic risk.


    Non-destructive testing of welds and steel structures.


    Safety checks of structural and non-structural elements.

Watch the video to learn more…

For a precise and accurate work, Progetto PSC has chosen our Ultrasonic Thickness Gauge SAUT310D-SW, able to measure the thickness also through paints and coatings.

Innovative and efficient tool thanks to its ease of use, high precision and exceptional ductility of use.
Do as PSC Project and get started with SAMA Tools!


Would you like more information or assistance?

If you are looking for information on a specific model of ultrasonic thicknesses or would like to know more, please contact our technical department.
You can call us at 0584/392342 – 0584/392453 or, alternatively, fill in the online form to contact us in writing.


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