The Megger 247001 Digital Low Resistance Ohmmeter Single-Pak 10 A is a highly accurate instrument that provide a simple, practical and reliable means of making low-resistance tests in the field. It is also are ideal for production quality control. It operates on the four-wire measurement principle, thus eliminating lead and contact resistances. With basic accuracies of ±0.25% and resolution down to 0.1 μ Ω , the Megger 247001 is nonetheless designed to be rugged and portable for use at the job site. A variety of optional test leads and calibration resistance standards are offered for use with DLROs.