AmpFLEX™ Power Quality Clamp Compatible with all PEL and Qualistar Power Quality Analysers including the: CA8333, CA8336, CA8345 and the PEL 103. The Chauvin Arnoux AmpFLEX™ range offers various clamping diameters, lengths and a measurement range of 0.5 A to 10 kA ac. The patented system enables the instrument to recognise the clamp, which provides an easy connection with faster and more accurate measurements.