Hioki Ir4053 Insulation Tester

Built-in comparator function
Safely and accurately measure PV insulation resistance even while generating solar power
Built-in 1000 VDC voltage measurement for open voltage tests of PV systems that support 1000 V
Drop-proof design withstands drop onto concrete from a height of 1 meter
Five ranges (50/125/250/500/1000V) built in for normal insulation resistance measurement