(3) Eddy current testing equipment manufacturers do not use coupling agents for eddy current testing. The magnetic field encouraged in eddy current testing is essentially just a radio wave. Eddy current testing of stainless steel pipes has uncertainty and graininess, so the probe (electromagnetic coil) can be dispersed between the product workpiece without coupling, making non-contact testing possible. This is better than ultrasonic testing. Due to the fact that ultrasound is a mechanical wave, it only spreads in chemical substances. Therefore, it is necessary to add coupling agent between the probe and the product workpiece in ultrasonic testing.

(4) Eddy current testing can achieve rapid and automated technical testing.

(5) Eddy current testing machine equipment can be used for testing high-temperature metal materials, as metal materials have conductivity at high temperatures.

(6) Eddy current testing is also applicable to the detection of irregular materials. If the electromagnetic coil is made into various shapes, testing can be carried out.

The eddy current testing machine has good insertion performance and high sensitivity to small cracks and other defects. Its detection probe does not need to touch the object being tested, and can also check the appearance and specifications of complex electrical conductors. The X-ray machine of the welding seam inspection manufacturer requires very little preparation work in advance, and the test results are indeed timely.