Chauvin Arnoux MTX 3297EX [MTX3297EX] 20A AC/DC Metrix Intrinsically Safe ATEX Digital Multimeter. The Chauvin Arnoux (Metrix) MTX 3297Ex is an intrinsically safe TRMS digital multimeter, purpose-built for use in explosive environments. It's certified for gas (IIC) and dust (IIIC) zones and M1 mining applications. With a 60,000-count display, TRMS AC+DC capability, and a 100 kHz bandwidth, it's a reliable choice for electrical measurements in hazardous Ex zones. The MTX 3297Ex is an outstanding multimeter with approvals and certifications for the most critical risk levels. It meets stringent requirements and boasts an impressive IP67 rating, ensuring protection against liquids and dust, and the rugged casing provides shock protection. This multimeter is designed for high-performance industrial use and adheres to the IEC 61010-2-033 standard, making it suitable for electrical work on 1000 V CAT III and 600 V CAT IV installations.