The DUOYI DY4100 Digital Earth Ground Resistance Tester is a professional instrument designed to measure earth resistance and soil resistivity for electrical grounding systems.It is widely used in power installations,telecommunication systems,and industrial environments to ensure proper grounding and safety.The device provides accurate and reliable readings using advanced digital measurement technology and supports multiple testing methods including 2-wire and 3-wire testing.It features a clear digital display for easy reading of measurement values and a user-friendly interface for efficient operation.The tester is compact and portable,making it suitable for field work and on-site testing.It is built with durable materials to withstand tough working conditions and ensure long-term performance.This ground resistance tester is essential for electricians,engineers,and technicians involved in grounding system testing and maintenance.