EMAT vs PIEZO

2

Comparison of Piezo- and EMAT-technology for emitting/receiving of ultrasound

 Conditions of testing

PIEZO-technology

EMAT-technology

Dirty surface of object

no

yes

Testing of moving objects at high speed

normally up to 1.5 m/s
(see below note 1*)

without any limitation

Curvature of test object

has a big influence on test results

yes

Low temperature of object or of environment

normally for range -10…+90 Celsius deg.

without any limitation

Hot objects (up to 1200 Celsius degree)

normally up to +90 Celsius deg (see below note 2*)

yes

Note:

1* - practical limit is 15 m/s at restrictions of test conditions and at the using special actions for providing of stability of acoustic contact;

2* - practical limit is up to 300 Celsius degree at restrictions for test conditions for providing of acoustic contact and at restriction of productivity of testing (not typical for mass using).

ULTRAKRAFT, JSC

ZAO ULTRAKRAFT (Ultrakraft, JSC) is a russian engineering company. The main professional field is development and applying of advanced solutions in the field of nondestructive testing and automation.

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