The AEMC MX 57EX TRMS 50,000-Count TRMS Digital Multimeter (2130.66) is an intrinsically safe digital multimeter designed for use in dangerous or explosive atmospheres. The MX 57EX TRMS Digital Multimeter is considered as a passive device without inductive or capacitive issues that are problematic in dangerous or explosive environments. The MX 57EX TRMS Digital Multimeter provides high functionality in a unique case that is designed for enhanced safety, reliability, ease-of-maintenance and protection from contaminants.