The Hioki SM-8220 Super Megohmmeter offers the highest insulation resistance measurement range in its class—up to 2 × 10¹⁶ Ω. Designed for advanced testing in research, manufacturing, and quality control, it supports variable test voltages from 10 V to 1,000 V and includes standard features such as timer, comparator, interlock safety, and RS-232C connectivity.