The Fluke i2000 Flex AC Current Flex Clamp/Banana Plugs, 20A-2000A AC Switchable utilizes the Rogowski (air-cored coil) principle. It can be used to measure currents up to 2000A when used in conjunction with multimeters, recorders, or data loggers. The flexible and lightweight measuring head allows for quick and easy installation on thick and hard-to-reach areas.