WL-003 DUOYI DY30-2 DIGITAL INSULATION RESISTANCE TESTER is an instrument for measuring insulation resistance in electrical circuits. This device is often used in industrial plants, electrical maintenance and repair work, electrical wiring installations and similar areas. The DY30-2 model is generally designed to measure insulation resistance in high-voltage electrical systems. Insulation resistance indicates how effective the insulation in an electrical circuit is. Therefore, high insulation resistance is regarded as a sign of a safe and robust electrical installation. The instrument is usually capable of high-precision measurements and usually has a wide measuring range. In addition, it has a user-friendly interface and a large display that makes it easy to read the data.