渦電流
Frost &amp; Sullivan analysis in the global NDT equipment market in 2012 estimated the magnetic and electromagnetic NDT equipment market at $220 million, which includes conventional eddy current, [[magnetic particle inspection]], [[eddy-current testing#Eddy current array|eddy current array]], and [[Remote field testing|remote-field testing]]. This market is projected to grow at 7.5% compounded annual growth rate to approximately $315 million by 2016.