Jiangyin Spark is a professional manufacturer in China devoted in research ,design ,and production of Split Core Current Transformers(SCT) ,Split Core (Clip on ) Current Sensor ,Split Core Current Transducer ,High precision current transformer ,and mini voltage transformer .Measure AC current from 1A to 5000A, Output can be 333mV ,mA ,1A and 5A .UL,CE approved.