Quick overview of all DUOYI ground resistance testers’ simple introductions.

DY4100: 3-wire ground resistance, lower price.

DY4100A: 3-wire ground resistance, photovoltaic voltage, more convenient to use.

DY4100B: 4-wire ground resistance, photovoltaic voltage, soil testing, easy to use.

DY4300: 4-wire ground resistance, soil testing, designed for higher accuracy requirements.