Inductive proximity sensors detect metallic objects (both ferrous and non-ferrous metals). There are three primary parts to an inductive sensor: inductive coil with oscillator, evaluation circuit, and output circuit. When an oscillating signal is applied to the coil, a magnetic field is created. The presence of metal disrupts the magnetic field and is detected by the evaluation circuit, which energizes an output signal. Inductive sensing technology allows targets to be detected without contact while ignoring most environmental influences such as reflected light, dirt, debris, and oil. Typical applications for inductive proximity sensors include gear tooth detection (RPM), speed monitoring, end of travel detection, and positioning/closure in various industries including plastics, packaging, food and beverage, agriculture, transportation, mining, and mobile equipment.