Occupant monitoring systems

A system for use within a space such as homes or offices and comprising one or more motion detection sensors 1 , an alarm means 6 , and several logic processing devices. The logic processing devices allow said system be used to monitor levels of occupant motion by comparing motion detection sensor activation patterns to one or more predetermined activation-based rules, and if any of the activation-based rules have been broken to then to signal an alarm via the alarms devices 6 . The system is designed to detect situations where the occupants or occupants may be ill, injured, dead or trapped within a single room. The activation-based rules within the system are programmed such that that they remain constant for at any given time of day, or such that they vary depending on previous activation patterns.