Miller Electric Mfg. Co. has added the new Big Blue® 450 Duo CST, a dual-operator diesel engine-driven welding generator, to its line of products. The generator features two CST 280 Stick/TIG inverters and 12,000 watts of continuous three-phase power in a single unit. Powered by Mitsubishi’s S4L2 4-cylinder diesel engine, the Big Blue 450 Duo CST provides a boost in productivity by allowing two welders to work off the same machine with two separate welding outputs. Designed for use in construction, maintenance, pipe welding and general fabrication, this Tier 4i compliant machine operates at a low 1800 RPM, reducing fuel use and keeping noise levels up to 10 dBa quieter than other models. The generator features an easy process selector for Stick and TIG applications. Stick welders can select the type of electrode and whether to weld in a stiff setting (more dig/arc force) or a soft setting (lower dig/arc force), allowing them to further tailor welding output. The system also offers Adaptive Hot Start(TM) for Stick welding applications. This technology raises the output amperage at the beginning of a weld to help prevent the electrode from sticking and creating an inclusion. The machine offers a number of other features including a high-efficiency, three-phase rotating-field generator that requires less fuel and horsepower to operate; built-in thermal overload protection to prevent machine damage if the duty cycle is exceeded or if airflow is blocked; an engine designed to run more than 10,000 hours before its first major overhaul; and an easy-to-understand meter maintenance display that reports hours, oil change intervals, high coolant temperature and low oil shutdowns.