BorgWarner’s eddy current speed sensor features more compact dimensions and a longer lifetime for turbochargers. Offering a "non-pigtail" solution with integrated electronics, the cost-effective sensor is now directly attached to the compressor housing. Unlike the predecessor model, the new speed sensor can for the first time also be used in passenger-car applications. The previously used passive speed sensor was based on the inductive principle without a supply voltage. By contrast, the new sensor is a 5-V active speed sensor that transmits a rotational speed signal to the engine management unit. By using the eddy current effect, the sensor operates without contact, and is therefore mechanically wear free and requires no maintenance. The new generation of turbocharger speed sensors can measure rotation from about 1000 to 350,000 rpm.