The Digital Earth Clamp Tester measures earth / ground resistance using clamp on technology. This is major breakthrough in traditional grounding resistance measurement. DECT 3 can measure earth resistance, earth bond & leakage current measurement .This meter is a useful addition to the more traditional methods of earth/ground resistance testing that may require disconnection & the use of stakes or ground rods. Simply clamp around the conductor or stake/rod and measure the resistance to ground fast and accurately. The unique long jaw is particularly suitable where grounding is done by flat steels or copper strips. It has low battery indication & data hold facility with memory function.DECT-3 can be connected to computer via RS232 interface. This meter is double insulation level and hence protected from external magnetic & electric field.