| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve at least one of the deficiencies of the prior art and to provide a proximity sensor so as to provide a higher resistance against harmful external influences, such as high temperature and contamination, and/or to prolong its life cycle and reliability.SOLUTION: A proximity sensor has a coil (15) for generating a magnetic field and a sensor circuit (62) for detecting variations of the magnetic field caused by an external object. The sensor circuit (62) comprises at least one semiconductor component (36, 37, 67, 69, 70, 71) mounted on a circuit board (17), and the coil (15) and the circuit board (17) are arranged in a housing (2) through which the magnetic field is transmittable. The semiconductor component (36, 37, 67, 69, 70, 71) is included in an enclosure (20) that is hermetically sealed and fixed on a surface (18, 19) of the circuit board (17).</p> |
