Fall arrest devices, and related methods

A fall arrest device configured to be mounted around a wire rope of an elevator, the fall arrest device comprising a casing with an entry hole for the wire rope, and an exit hole for the wire rope, and

• a clamping mechanism and an overspeed detector arranged inside the casing,
• the overspeed detector comprising a driven roller arranged to be driven by the wire rope and wherein the clamping mechanism is configured to clamp the wire rope if the overspeed detector detects a speed of the driven roller above a predetermined threshold, wherein
• the driven roller has one or more selected areas to be detected by a sensor, and the device further comprising
• a motion indicator configured to receive a signal from the sensor when the sensor detects one of the selected areas, and
• the motion indicator is configured to give different indications depending on whether or not the signal is received from the sensor,
• such indications being detectable from outside the casing.