Extech GRT300 4-Wire Earth Ground Resistance Tester Kit
Measure earth ground in 4 ranges from 2 to 2000 Ω.

Features:

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

Specifications:

AC Earth Voltage/Frequency 0 to 300VAC/40 to 500Hz Accuracy ±(2% rdg + 3d) Power Supply Eight 1.5V 'AA' Batteries Dimensions 9.8 x 7.8 x 4.3" (250 x 190 x 110mm) Weight 3.15 lbs (1430g) (batteries included) AC Earth Voltage/Frequency0 to 300VAC/40 to 500HzAccuracy±(2% rdg + 3d)Power SupplyEight 1.5V 'AA' BatteriesDimensions9.8 x 7.8 x 4.3" (250 x 190 x 110mm)Weight3.15 lbs (1430g) (batteries included)AC Earth Voltage/Frequency0 to 300VAC/40 to 500HzAccuracy±(2% rdg + 3d)Power SupplyEight 1.5V 'AA' BatteriesDimensions9.8 x 7.8 x 4.3" (250 x 190 x 110mm)Weight3.15 lbs (1430g) (batteries included)