A monitoring system (60, 160, 260, 360) for an inclined passenger conveyor (10, 110, 210, 310) having a transportation band (12, 112, 212, 312) for conveying passengers between a lower landing region (52, 152, 252, 352) and an upper landing region (54, 154, 254, 354); an endless drive member (230, 330) on which the transportation band (12, 112, 212, 312) is mounted, and at least one moving hand rail (22, 122, 222, 322); wherein the monitoring system (60, 160, 260, 360) comprises: at least one fault detection sensor (72a, 172a, 272a, 372a), provided on a movable component of the inclined passenger conveyor (10, 110, 210, 310); an associated pressure sensor (74a, 174a, 274a, 374a) provided adjacent to and associated with the or each fault detection sensor (72a, 172a, 272a, 372a); wherein the or each associated pressure sensor (74a, 174a, 274a, 374a) is configured to measure the barometric pressure at a current position of its associated fault detection sensor (72a, 172a, 272a, 372a); and a controller (80, 180, 280, 290, 390); wherein the controller (80, 180, 280, 290, 390) is configured to: receive data relating to a barometric pressure at a first defined vertical height; receive data from the at least one fault detection sensor (72a, 172a, 272a, 372a) indicative of a detected fault; and determine a fault status from the detected fault data, characterised in that the controller (80, 180, 280, 290, 390) is further configured to: receive data from the associated pressure sensor (74a, 174a, 274a, 374a); calculate a vertical height of the detected fault data based on a comparison between the barometric pressure at the first defined vertical height and the instantaneous barometric pressure at the location of the fault data; and determine the location of the determined fault status based on the calculated vertical height, and in that the monitoring system (60, 160, 260, 360) further comprising a first stationary pressure sensor (70, 170, 270, 370) provided at a fixed point on the inclined passenger conveyor (10, 110, 210, 310) and configured to measure the barometric pressure at the first defined vertical height. wherein the monitoring system (60, 160, 260, 360) comprises: at least one fault detection sensor (72a, 172a, 272a, 372a), provided on a movable component of the inclined passenger conveyor (10, 110, 210, 310); an associated pressure sensor (74a, 174a, 274a, 374a) provided adjacent to and associated with the or each fault detection sensor (72a, 172a, 272a, 372a); wherein the or each associated pressure sensor (74a, 174a, 274a, 374a) is configured to measure the barometric pressure at a current position of its associated fault detection sensor (72a, 172a, 272a, 372a); and a controller (80, 180, 280, 290, 390); at least one fault detection sensor (72a, 172a, 272a, 372a), provided on a movable component of the inclined passenger conveyor (10, 110, 210, 310); an associated pressure sensor (74a, 174a, 274a, 374a) provided adjacent to and associated with the or each fault detection sensor (72a, 172a, 272a, 372a); wherein the or each associated pressure sensor (74a, 174a, 274a, 374a) is configured to measure the barometric pressure at a current position of its associated fault detection sensor (72a, 172a, 272a, 372a); and a controller (80, 180, 280, 290, 390); wherein the controller (80, 180, 280, 290, 390) is configured to: receive data relating to a barometric pressure at a first defined vertical height; receive data from the at least one fault detection sensor (72a, 172a, 272a, 372a) indicative of a detected fault; and determine a fault status from the detected fault data, receive data relating to a barometric pressure at a first defined vertical height; receive data from the at least one fault detection sensor (72a, 172a, 272a, 372a) indicative of a detected fault; and determine a fault status from the detected fault data, characterised in that the controller (80, 180, 280, 290, 390) is further configured to: receive data from the associated pressure sensor (74a, 174a, 274a, 374a); calculate a vertical height of the detected fault data based on a comparison between the barometric pressure at the first defined vertical height and the instantaneous barometric pressure at the location of the fault data; and determine the location of the determined fault status based on the calculated vertical height, receive data from the associated pressure sensor (74a, 174a, 274a, 374a); calculate a vertical height of the detected fault data based on a comparison between the barometric pressure at the first defined vertical height and the instantaneous barometric pressure at the location of the fault data; and determine the location of the determined fault status based on the calculated vertical height, and in that the monitoring system (60, 160, 260, 360) further comprising a first stationary pressure sensor (70, 170, 270, 370) provided at a fixed point on the inclined passenger conveyor (10, 110, 210, 310) and configured to measure the barometric pressure at the first defined vertical height.