An elderly care and security system comprises one or more networked lighting luminaire installed in a room, the luminaire comprising: one or more sensors configured to: detect a fall; detect smoke; detect glass break; detect presence of another person in the room while the elderly person is lying in bed; and detect presence of a person while an alarm system is active and detect no presence for a period longer than a predetermined time interval; a lighting unit controlled to adaptively illuminate the room; a wireless bi-directional transceiver, loudspeaker and microphone, configured to be activated automatically for communication with the elderly person, a caregiver or relative; a door locking/unlocking unit with connectivity to an electrical door lock, configured to automatically lock/unlock a door of a safe room for the elderly person; and an alarm activating unit, configured to automatically activate/deactivate an alarm.

An elderly care and security system comprises one or more networked lighting luminaire installed in a room, the luminaire comprising: one or more sensors configured to: detect a fall; detect smoke; detect glass break; detect presence of another person in the room while the elderly person is lying in bed; and detect presence of a person while an alarm system is active and detect no presence for a period longer than a predetermined time interval; a lighting unit controlled to adaptively illuminate the room; a wireless bi-directional transceiver, loudspeaker and microphone, configured to be activated automatically for communication with the elderly person, a caregiver or relative; a door locking/unlocking unit with connectivity to an electrical door lock, configured to automatically lock/unlock a door of a safe room for the elderly person; and an alarm activating unit, configured to automatically activate/deactivate an alarm.

Devices, methods, and systems for a self-testing fire sensing device are described herein. One device includes an adjustable particle generator and a variable airflow generator configured to generate an aerosol density level sufficient to trigger a fire response without saturating an optical scatter chamber and the optical scatter chamber configured to measure a rate at which the aerosol density level decreases after the aerosol density level has been generated, determine an airflow rate from an external environment through the optical scatter chamber based on the measured rate at which the aerosol density level decreases, and determine whether the self-testing fire sensing device is functioning properly based on the fire response and the determined airflow rate.

Methods and systems for detecting barrier blockage in a gas detector are disclosed. In some embodiments, a gas detector comprises a barrier configured to define a sensing chamber of the gas detector. The gas detector further comprises a radiation detection system. The radiation detection system comprises a radiation source and a detector. The radiation detection system may be configured for generating output signals related to radiation transmitted through the barrier. The gas detector comprises a controller operatively connected to the radiation detection system. The controller is configured to: determine an amount of radiation transmitted through the barrier based on the output signals; and determine a condition of the barrier based on the determined amount of radiation, wherein the determined condition indicates whether the barrier is blocked.

A method and system of providing guidance and information to an end-user during an emergency situation. A network of one or more enrolled devices can obtain infrared data that will be used by the system to determine whether there is a high likelihood of a fire in a building. When an emergency situation such as a fire is detected, alerts can be generated at the enrolled devices that provide navigation cues based on user preferences and suggested evacuation routes to safely guide the end-user to the nearest designated exit.

A method and system of providing guidance and information to an end-user during an emergency situation. A network of one or more enrolled devices can obtain infrared data that will be used by the system to determine whether there is a high likelihood of a fire in a building. When an emergency situation such as a fire is detected, alerts can be generated at the enrolled devices that provide navigation cues based on user preferences and suggested evacuation routes to safely guide the end-user to the nearest designated exit.

A detector assembly for a duct of a heating ventilation and air conditioning system includes an outer housing having at least one through hole formed therein, an inner sampling support receivable within a hollow interior of the outer housing, and at least one detector mounted to the inner sampling support. The at least one detector is axially aligned with the at least one through hole when the inner sampling support is installed within the hollow interior of the outer housing. The at least one detector is operable to sample air within the duct to detect a hazardous condition.

A fire detection system includes a transmitter including a light source that sends an optical signal and a receiver including a detector that detects the optical signal sent from the light source through a predetermined light propagation section, a signal processing unit that calculates at least one of a first gas concentration, a first smoke concentration, and a first temperature in the light propagation section based on the optical signal, a sensor that acquires at least one of a second gas concentration, a second smoke concentration, and a second temperature in the surroundings, and a determiner that determines whether there is a fire by comparing at least one of the first gas concentration, the first smoke concentration, and the first temperature with at least one of the second gas concentration, the second smoke concentration, and the second temperature in the surroundings.

A fire detection system includes a transmitter including a light source that sends an optical signal and a receiver including a detector that detects the optical signal sent from the light source through a predetermined light propagation section, a signal processing unit that calculates at least one of a first gas concentration, a first smoke concentration, and a first temperature in the light propagation section based on the optical signal, a sensor that acquires at least one of a second gas concentration, a second smoke concentration, and a second temperature in the surroundings, and a determiner that determines whether there is a fire by comparing at least one of the first gas concentration, the first smoke concentration, and the first temperature with at least one of the second gas concentration, the second smoke concentration, and the second temperature in the surroundings.

An optical chamber assembly of a life safety device includes a light ring for supporting at least one light device and an optical cover defining an interior chamber of the optical chamber assembly. The optical cover has a plurality of side members spaced from one another to define a plurality of smoke flow paths connected to the interior chamber. A light cover is disposed between the light ring and the optical cover and optically couples the at least one light device with the interior chamber. A primary smoke entry location is defined by at least one of the plurality of smoke flow paths in the optical cover and a secondary smoke entry location distinct from the primary smoke entry location is arranged in fluid communication with the interior chamber.