Device for measuring at least one kinematic parameter of a railway rail having a foot with a lower surface, configured to be permanently applied to said railway rail and comprising: - at least one sensor configured to detect said at least one kinematic parameter, and configured to automatically activate upon approaching and/or following the detection of a disruptive event propagating along said railway rail; and - a control unit connected to said sensor and configured to operate in a dormant configuration, wherein the sensor is at least temporarily deactivated and corresponding to a situation of absence of propagation of disruptive events through the railway rail, and in an operating configuration, wherein the sensor is activated to actuate a sequence of detections of said at least one kinematic parameter, said control unit being further configured to temporarily activate said sensor during the dormant configuration to actuate isolated detections, at predetermined time intervals, and to store said detections and/or to send said detections to a receiving device, characterized in that said control unit is also configured to deactivate the sensor after a predetermined time from the activation of the operating configuration and/or from an instant when the disruptive event falls below a predetermined threshold, in particular below a predetermined amplitude; and wherein: - said device further comprises a fixing portion provided with one or more attachment members and stably coupled to the lower surface of the foot of the railway rail; and - said device further comprises a support base (6b, 7) stably coupled to a fixed support surface, being railway ballast, to assume a stationary configuration during the operation of the device; - said sensor further comprises a linear transducer, said linear transducer being configured to measure a linear displacement and/or a reciprocal position between the fixing portion and the support base (6b, 7). - at least one sensor configured to detect said at least one kinematic parameter, and configured to automatically activate upon approaching and/or following the detection of a disruptive event propagating along said railway rail; and - a control unit connected to said sensor and configured to operate in a dormant configuration, wherein the sensor is at least temporarily deactivated and corresponding to a situation of absence of propagation of disruptive events through the railway rail, and in an operating configuration, wherein the sensor is activated to actuate a sequence of detections of said at least one kinematic parameter, said control unit being further configured to temporarily activate said sensor during the dormant configuration to actuate isolated detections, at predetermined time intervals, and to store said detections and/or to send said detections to a receiving device, - said device further comprises a fixing portion provided with one or more attachment members and stably coupled to the lower surface of the foot of the railway rail; and - said device further comprises a support base (6b, 7) stably coupled to a fixed support surface, being railway ballast, to assume a stationary configuration during the operation of the device; - said sensor further comprises a linear transducer, said linear transducer being configured to measure a linear displacement and/or a reciprocal position between the fixing portion and the support base (6b, 7).