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Testboy is a leading manufacturer of electrical testing and measurement equipment for electricians, installers and maintenance professionals. Its portfolio includes voltage testers, multimeters, cable locators, socket testers and environmental measuring instruments designed to deliver reliable and accurate results in industrial, commercial and residential applications. Professionals worldwide trust Testboy products for safety, durability and ease of use.
The Testboy TV 441 is designed for precise measurement of earth resistance using the three-conductor method. It feeds AC current between an auxiliary electrode and the earth system, measuring voltage drop via a probe. With auto-power off and memory for up to 100 readings, it ensures efficient and accurate testing.
