The Chauvin Arnoux set of 10 black connect catches These flexible sensors measure both weak alternating currents, of a few hundred mA, that the strong of several tens of kA. Their major interest flexibility and maneuverability for enclose the conductors, whatever their nature (cables, bars, strands) or their accessibility. Their other strengths are the low weight (no circuit magnetic), the absence of saturation effect and the excellent precision associated with the very low phase shift particularly suitable for wattmeter measurements.