MR8880-20 is a Memory HiCorder manufactured by Hioki. This device is capable of capturing low-voltage signals in a single device. This tool is capable of measuring 480V power line, which offers CAT III 600 V insulation performance. It has 4 fully isolated channels that allow the user to record dates on a 3-phase power line with one extra channel. This unit can withstand harsh environments with its -10°C to 50°C operating temperature range.