Stock number < 446-0440') 446-0440/, has a recommended load resistance of 1 M . For 100 k add 1.3% error. AK/AKR Series Split Core. Measurement of ac sinusoidal waveform currents Large aperture Easy to mount. AK - B10 Series. 10 to 50A and 100 to 200A ac self powered current transducers with analogue output Applications include remote monitoring of automation systems, data loggers and panel meter power consumption. AKR - B420L Series. High isolation between primary and secondary circuits Use these products for non linear loads or in "noisy" power environments. AK - B420L Series. RMS voltage output signal High isolation between primary and secondary circuits