Miller Electric introduces the new Big Blue 450 Duo CST, a dual-operator diesel-driven welding generator that features two CST 280 Stick/TIG inverters and 12,000 watts of continuous three-phase power in a single unit, equipped with an easy process selector for stick and TIG applications. Powered by a Mitsubishi S4L2 4-cylinder diesel engine, the Big Blue 450 Duo CST provides increased productivity by allowing two welders to work off the same machine with two separate welding outputs. In addition to the dual operator weld outputs, the machine offers features that simplify maintenance and operation, including a high-efficiency, three-phase rotating-field generator that requires less fuel and horsepower to operate. Built-in thermal overload protection prevents machine damage if the duty cycle is exceeded or if airflow is blocked. The engine is designed to run more than 10,000 hours before its first major overhaul, and the machine offers an easy-to-understand meter maintenance display that reports hours, oil change intervals, high coolant temperature and low oil shutdowns, and a low fuel shutdown that shuts down the system before it runs out of fuel, making restarts easy.