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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 50 is a compact and reliable testing pin for quickly checking DOT 4 brake fluids. With five LEDs indicating water content, it offers fast and precise diagnostics for glycol-based brake fluids—ideal for quick inspections in automotive workshops. Its illuminated probes, durable design, and resistance to acids and alkalis ensure long-lasting performance.
