Earth Resistance Testers

3 Wire Analog Earth Resistance Testers: 1105 ER, 1805 ER, 2105 ER, 2705 ER, 4105 ER, ST-1505.

3 Wire Digital Earth Resistance Testers: 1120 ER, 1620 ER, 1820 ER, 2120 ER, 2720 ER, 4120 ER, 8020 ER, ST-1520.

4 Wire Digital Earth Resistance Testers: 2734 ER, 4234 ER, 4235 ER, 4236 ER.

4 Wire Earth Resistance & Resistivity Testers: 4235 ER, 4236 ER.