Method and system for observing the presence, location, movement and/or attitude of one or more objects to be monitored in an area to be monitored (108), which system comprises at least one sensor (101, 201 ). The sensor or sensors (102, 201 ) are fitted into some part, such as e.g. on a floor, wall and/or ceiling (1 10), of the area (108) to be monitored. The sensor is a sensor (101 ) detecting movement and/or presence, which sensor is adapted to measure in two measuring ranges (104, 105) that are at a different height, of which the first measuring range is an upper measuring range (105) and the second measuring range is a lower measuring range (104). The system is adapted to interpret a person as having fallen if an object (106) is not detected in the upper measuring range (105) and an object (106) is detected in the lower measuring range (104). The system is adapted to send a notification of a fall if a person is interpreted as having fallen and the predetermined criteria attached to sending a notification of a fall are met.
