The 171-233 magnetic speed pickup sensor is designed to measure the rotational speed of an engine. It works by detecting the flywheel’s movement and converting this motion into an AC signal, where the signal frequency is proportional to the engine’s speed. This sensor is commonly used in generators, such as FG Wilson models, and it features a robust design suitable for harsh environments with a temperature range from -55℃ to 105℃. It is often paired with tachometers or speed governors for accurate monitoring of engine speed.