The Megger DET4TD2 is the most advanced insulation and continuity tester on the market. It features a unique combination of features that make it ideal for testing electrical systems in a wide range of applications. High accuracy: The DET4TD2 is accurate to within ±0.5% of reading, making it the most accurate insulation tester available. Wide measurement range: The DET4TD2 can measure insulation resistance from 0.1 MΩ to 10 GΩ, making it suitable for testing a wide range of electrical systems. Fast test times: The DET4TD2 can perform insulation tests in as little as 1 second, making it the fastest insulation tester available. Rugged construction: The DET4TD2 is built to withstand the rigors of field use, making it the ideal choice for testing electrical systems in harsh environments.