🔧 Test with Confidence: The Fluke 1503 is your ultimate insulation ally! Live circuit detection prevents accidental testing over 30 V. Achieve accurate readings with +/- 2% accuracy. Includes everything you need: tester, probes, and leads. Lightweight design (1 kg) for easy transport and use. Choose between 500 V and 1000 V for tailored testing. 0.01 mΩ to 2000 MΩ 500 V & 1000 V Live circuit detection The Fluke 1503 Insulation Resistance Tester is a compact, rugged device designed for both residential and commercial electricians. It performs insulation tests ranging from 0.01 mΩ to 2000 MΩ, offers two voltage options (500 V and 1000 V), and features live circuit detection for enhanced safety. Weighing just 1 kg, it’s the perfect tool for professionals on the go.