A split-core AC current sensor responsive over the range of 0 to 20 amps AC for use with U12 data loggers with external input channels. With an input current of AC current sine wave single phase 50 Hz or 60 Hz load power factor 0.5 to 1.0 lead or lag. This sensor is not designed for use with intrinsically-safe (IS) loggers; the molded-plastic housing is rated for indoor use per UL508.