Profile: Power Electronic Measurements Ltd. specializes in the design & manufacture of wide-bandwidth, flexible, clip-around and current sensors. The CWT Rogowski current probe is suitable for measuring AC current from 100 mA to 1 MA at frequencies from below 1 Hz up into the MHz region. The RCTi and RCTrms are AC current transducers for permanent or semi-permanent installation on equipment. They have a a small, lightweight, clip-around coil, whose length can be specified independently of the measured current. The devices are intrinsically safe to use because there is no danger of open circuit secondaries. They are not damaged by high current surges, nor do they suffer from magnetic saturation. They are exceptionally simple to retrofit into existing plant.