221916 - Miller Magnetic Speed Sensor Pickup 5/8-18

Precise Engine Control with Miller OEM Parts

The Miller 221916 Magnetic Speed Sensor is a critical electromechanical component designed for specific Miller engine-driven welding generators. As a genuine OEM replacement part, it ensures the reliability and performance standards expected from Miller Electric equipment. This magnetic pickup unit (MPU) is engineered to monitor the rotational speed of the engine's flywheel, providing essential frequency data to the main control board or electronic governor module. By detecting the passage of the flywheel ring gear teeth through a magnetic field, the sensor generates an AC voltage signal that corresponds directly to the engine's RPM.

Maintaining the correct engine speed is vital for a generator-welder. It directly correlates to the frequency (Hz) and voltage of the auxiliary power output, as well as the stability and characteristics of the welding arc. The sensor features a standard 5/8-18 UNF thread, allowing for precise adjustment and secure fitment within the flywheel housing. Its robust metal construction is built to endure the high-vibration, oil-mist, and high-temperature environment typical of industrial welding sites. The internal coil and magnet assembly are potted to protect against moisture and mechanical shock.

When replacing a speed sensor, using the authentic Miller 221916 ensures compatibility with the machine's electronic logic. Generic sensors may not provide the correct impedance or voltage signal amplitude required by Miller control modules, potentially leading to erratic idle, over-speed faults, or the machine's inability to maintain load speed. Furthermore, the tip of the sensor is designed to be sensitive enough to read gear teeth accurately without needing to be positioned dangerously close to the moving parts. Trust in genuine Miller parts to keep your heavy-duty equipment running at peak efficiency and to avoid costly diagnostic loops caused by inferior aftermarket sensors.