The OM-200 / OM-1200 provides a simple yet effective method for measuring engine speed. By detecting subtle magnetic flux variations near a magneto shaft or ignition coil, it avoids physical interference and preserves engine integrity. With a comfortable detection distance of around 100 mm and broad environmental tolerance, it stands up well to field or workshop usage. Engineered to interface seamlessly with a range of tachometers, it ensures accurate, non-disruptive RPM readings—ideal for maintenance, diagnostics, and performance monitoring.