Miller 217084 Coolant Temperature Gauge 0-300°F

The Miller 217084 Coolant Temperature Gauge is a purpose-built OEM replacement for Miller welding and cooling systems that require accurate, at-a-glance temperature monitoring. With a 0–300°F range, it sits squarely in the sweet spot for liquid-cooled welders—giving operators clear visibility into normal operating conditions while providing early warning before temperatures reach damaging levels. If your original gauge has fogged, stuck, or stopped reading altogether, this is the factory-spec part that restores full functionality.

Construction follows the straightforward analog approach Miller uses across its instrument line. The gauge housing is built to handle the vibration and heat typical of shop environments, and installation is a direct swap for the original unit—no adapters or wiring changes required. It reads cleanly under normal shop lighting, and the mechanical sensing element means there's no calibration drift from electrical interference. For anyone maintaining Miller cooling systems, this gauge does exactly one job and does it well.