The invention discloses a sensor. The sensor comprises a base plate, a sensing element arranged on the base plate, at least two layers of column walls, a sensing element structural layer covering the periphery of the outermost column wall and at least two sealing covers. The column walls are arranged on the base plate around the sensing element and are formed by deposition and etching, and the connected column walls are bonded through packing colloid. The innermost sealing cover is clamped between the packing colloid between the two column walls of the innermost layer, and the outer layer sealing cover is arranged on the column walls. The sensor comprises a plurality of layers of column walls, the sensor can be effectively prevented from being damaged caused by hitting, external impact resisting capacity is greatly enhanced, the column walls are connected through the packing colloid, air holes are formed in the packing colloid between the column walls, the connection is firmer, a certain buffer space is formed due to the air holes, therefore, the impact resisting capacity is further enhanced, and damage is not easy. The sensing element is further provided with a sealing layer, supporting points are added, and the sensing element is further protected.