The Hantek CC-65 Current Clamp for measuring currents in the range 20mA to 65A in conductors up to 12mm in diameter. It is powered by a 9V alkaline battery (not supplied) for up to 100 hours which makes ideal for use away from the lab.
It is a current transducer which constructed of permalloy and hall-effect element, which linearly transforms current flowing from the magnetic field generated around a conductor to a voltage at 1mV/10mA.
This model has been designed to be connected to a multimeter and is fitted with 4mm "banana" plugs.