AC current clamp meter, 100 A, 45 Hz to 5 kHz The HIOKI 9660 current clamp sensor is designed for measuring alternating currents with a nominal measuring range of 100 A. It is often used with network quality analysers, performance measuring devices and similar devices for measuring load current. Thanks to its compact design, the sensor fits in confined spaces and is ideal for use on commercial power lines and inverters. Technical details