PROBLEM TO BE SOLVED: To provide a sensor capable of improving detection accuracy, and a sensor system.SOLUTION: A sensor includes: a plurality of light emitting elements disposed side-by-side in a first direction and a second direction intersecting with the first direction； and a light receiving element to which at least a part of light emitted from each of the plurality of light emitting elements is incident. The plurality of light emitting elements does not overlap with the light receiving element in a third direction perpendicular to the first direction and the second direction. The plurality of light emitting elements includes first light emitting elements and second light emitting elements. Positions of the second light emitting elements in a plane surface including the first direction and the second direction are among positions in the plane surface of the first light emitting elements and a position in the plane surface of the light receiving element.SELECTED DRAWING: Figure 1【課題】検出精度を向上できるセンサ及びセンサシステムを提供する。【解決手段】実施形態によれば、センサは、第１方向と、第１方向と交差する第２方向と、に沿って並ぶ複数の発光素子と、前記複数の発光素子のそれぞれから出射した光の少なくとも一部が入射する受光素子と、を含む。前記複数の発光素子は、前記第１方向及び前記第２方向に対して垂直な第３方向において、前記受光素子と重ならない。前記複数の発光素子は、第１発光素子と、第２発光素子と、を含む。前記第２発光素子の、前記第１方向及び前記第２方向を含む平面内の位置は、前記第１発光素子の前記平面内の位置と、前記受光素子の前記平面内の位置と、の間にある。【選択図】図１
