Ask an expert!
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 431 enables easy inspection of insulation resistance in devices, systems, and switchgear, offering four selectable test voltages (250 V, 500 V, 1000 V, 2500 V) for precise results. It also supports AC/DC voltage, continuity, and resistance measurements, extending its range of applications.
