Portable Megohmmeters are not your everyday item, but when dealing with high voltages you want to err on the side of caution. The AEMC 6550 and AEMC 6555 Portable Megohmmeters test DC voltages up to 10,000 and 15,000 respectively. These units come built into a rugged IP54 rated case that can handle the rumble and tumble of the everyday real world environment you work in. Both units offer live measurement of voltage to be sure you are working under safe conditions.