Battery Operated Analogue Insulation Tester measures high insulation in a range of up to 50GOhm. The Analogue Insulation Tester is an AC mains 230V or 110V cum internal rechargeable sealed maintenance free lead acid battery operated unit that ensures optimum functionality for longer period of time. The Analogue Insulation Tester indicates if the device under test is charged before operating. Battery Operated Analogue Insulation Tester allows automatic discharge of capacitive circuit, after insulation test.