Extech GRT300 4-Wire Earth Ground Resistance Tester

Product Highlights

• Measure earth ground in 4 ranges from 2 to 2000 Ohm
• 4-wire, 3-wire, and 2-wire testing
• Large dual line LCD
• Automatic I (current) and P (potential) spike check
• Test Hold function for easy operation
• Autoranging, Automatic Zero adjustment, Data Hold and Auto Power off
• AC Earth Voltage
• Overrange and low battery indication

Each Unit Includes

• Test leads with alligator clips
• 4 auxiliary earth bars
• Hard carrying case
• Eight 1.5V AA batteries