The I6000S FLEX-24 24 in. AC Current Flex Clamp/BNC, 60A-6000A AC Switchable utilizes the Rogowski (air-cored coil) principle and measures three ranges of currents up to 6000A, when used in conjunction with oscilloscopes, recorders, or data loggers. The flexible and lightweight measuring head allows for quick and easy installation in hard-to-reach areas without batteries or an external power source. This clamp fits around large conductors.