NON-CONTACT ULTRASONIC TESTING - EMAT

Electromagnetic acoustic transducers (EMAT) are emerging as a mainstream Non-Destructive Evaluation (NDE) technique. Electromagnetic acoustic transducer is commonly used for the non-contact generation and detection of ultrasonic signals in metals for some time.

EMAT works only in conductive and ferromagnetic materials. compared to classic piezoelectric transducers, it enables series of applications, which are rather problematic. The EMAT principle consists in the Lotentz's attractive force in magnetic field. The magnetic field orientation influents principally on generated ultrasonic wave type. EMAT offers several distinct advantages over traditional piezoelectric transducers for many inspection applications requiring novel solutions. These advantages include: operation without a coupling fluid, non-contact operation, high temperature operation, and the ability to utilize shear horizontal (SH) waves. EMATs are also ideally suited to launching and receiving Rayleigh waves, Lamb waves, and shear horizontal (SH) plate waves.

EMAT Transducer

Starmans electronics Ltd. company is a developer and producer of EMAT testing systems and transducer. Our developed systems are used in many industrial applications. We are able to completely fullfill the customer requirements and provide detail technical training. The basic principle of EMAT testing can be seen in the following picture.

EMAT Transducer

The following real examples show our portable and industrial EMAT systems that are used in many countries.

DIO1000 - EMAT portable systemDIO2000 - EMAT industrial system


EMAT - frame for tube inspectionEMAT - tube inspection

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