Enercorp Instruments Ltd. manufactures split-core current transducers and solid-core current transducers. The solid core transducers feature monitored AC current of 1-250 amps, through hole of 0.75" diameter, and maximum current of 150A to 1200A. The split-core transducers feature monitored AC current of 1.5 to 250 amps, through hole of 0.85" diameter, and maximum current of 150A to 1200A.