Pressure-sensitive safety device for monitoring a technical installation, comprising a sensor having first and second sensor cells, and first, second and third electrodes for making contact with the first and the second sensor cells. A pressure-sensitive material within the first and second sensor cells is configured, under local loading, to change an electrical property of the cells at the site of loading. An evaluation unit is configured to provide an output signal depending on an actuation of the first and second sensor cells. The first and second electrodes are connected to the first and second sensor cells, respectively, and the third electrode is connected to both the first and the second sensor cells. The first, second and third electrodes are connected to the evaluation unit by a first sequentialization element, and the first, second and third electrodes are connected to a defined first potential by a second sequentialization element.

A movement tracking device may comprise footwear and an adhesive substance, wherein a first side of the adhesive substance may be applied to a bottom side of the footwear, a second side of the adhesive substance is opposite the first side of the adhesive substance, the second side of the adhesive substance may make contact with a surface upon each step of the footwear, and the adhesive substance may emit an audible sound upon releasing contact with the surface. A movement tracking device may comprise footwear and an alarm mechanism, wherein the footwear comprises a sole, the alarm mechanism may be embedded inside the sole, and the alarm mechanism may emit an audible sound when a pressure is applied to the alarm mechanism.