NK Technologies' current transducers offer a choice of 0-5 VDC, 0-10 VDC or 4-20 mA average responding or True RMS outputs. NK Technologies has been manufacturing non-contact hall element based AC current transducers for over ten years, all made in California. NK Technologies wide range of AC current transducers guarantees that you will find exactly what you need. Neilsen Kuljian currently offer 11 series of AC current transducers.