Digital Low Resistance Ohmmeters (DLRO®) are a family of highly accurate instruments that provide a simple, practical and reliable means of making low-resistance tests in the field. They also are ideal for production quality control.

They operate on the four-wire measurement principle, thus eliminating lead and contact resistances. With basic accuracies of ±0.5% and resolution down to 0.1 µ-ohm, they are nonetheless designed to be rugged and portable for use at the job site. The instruments come standard with a 100-ampere lead set and a wide selection of 10-ampere lead sets is available as optional accessories. Calibration resistance standards are also available.