Produced by Shanghai Shenggao Electric Technology Co., LtdSGDW Earth Network Grounding Resistance TesterAlso known as power frequency grounding resistance tester, grounding resistance meter, etc., it is a commonly used instrument for inspecting and measuring grounding resistance. It adopts a new type of variable frequency AC power supply, dual frequency measurement technology, ultra large touchable color screen, and microprocessor technology to meet the impedance requirements of two-wire, three wire, and four wire testing. At the same time, it can measure soil resistivity, step voltage, distributed potential, contact voltage, current phase angle and other parameters. It is suitable for telecommunications, power, meteorology, computer rooms, oil fields, power distribution lines, iron tower transmission lines, gas stations, factory grounding grids, lightning rods, etc., and meets the standards of power substations and lightning protection device detection instruments. The characteristics of instrument testing include speed, simplicity, stability, and reliability.