A manual call point and optical beam smoke detector. The manual call point includes a housing, a plurality of components located within the housing including a mechanism operable to trigger an alarm, and a self-regulating heater. The self-regulating heater is configured to maintain a constant temperature within the housing. The optical beam smoke detector includes a housing having a window, a transmitter and/or a receiver located within the housing, and a heater located within the housing. The heater is configured to maintain a temperature difference between an interior of the housing and an exterior of the housing below a threshold temperature difference.

An aspirating detection system for detecting a fire event in a monitored environment, a method of determining when an aspirator for an aspirating detection system requires maintenance, and a method of calibrating a control module for an aspirating detection system. The aspirating detection system (1) includes an aspirator (2) for sampling air from the monitored environment (100), and a vibration sensor (3) configured to monitor a vibration signature of the aspirator (2). The aspirating detection system (1) may further include a control module (4) in communication with the vibration sensor (3). The control module (4) may be configured to determine if the aspirator (2) requires maintenance based on the vibration signature of the aspirator (2).

A fire detection system (10) includes a plurality of smoke detectors (14) positioned for detection of smoke within one or more smoke detection volumes (12a, 12b). The fire detection system (10) is configured to monitor occupancy of the smoke detection volumes (12a, 12b) or to receive data indicative of occupancy of the smoke detection volumes (12a, 12b), for example from an intrusion detection system (20). The fire detection system (10) is configured to adjust a smoke sensitivity associated with each of the smoke detectors (14) based on the occupancy of the respective smoke detection volume (12a, 12b), with the smoke sensitivity being decreased when the respective smoke detection volume (12a, 12b) is occupied.

A fire detection system (10) includes a plurality of smoke detectors (14) positioned for detection of smoke within one or more smoke detection volumes (12a, 12b). The fire detection system (10) is configured to monitor occupancy of the smoke detection volumes (12a, 12b) or to receive data indicative of occupancy of the smoke detection volumes (12a, 12b), for example from an intrusion detection system (20). The fire detection system (10) is configured to adjust a smoke sensitivity associated with each of the smoke detectors (14) based on the occupancy of the respective smoke detection volume (12a, 12b), with the smoke sensitivity being decreased when the respective smoke detection volume (12a, 12b) is occupied.

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 lighting fixture is provided. The lighting fixture includes a sensor, a first power circuit configured to produce a first driving current for the sensor, a second power circuit a first power circuit configured to produce a second driving current for the sensor, and a switching device connected to the power supply. The switching device is configured to move between a first position and a second position, and to connect the first power circuit to a power supply in the first position, and connect the second power circuit to the power supply in the second position.

A lighting fixture is provided. The lighting fixture includes a sensor, a first power circuit configured to produce a first driving current for the sensor, a second power circuit a first power circuit configured to produce a second driving current for the sensor, and a switching device connected to the power supply. The switching device is configured to move between a first position and a second position, and to connect the first power circuit to a power supply in the first position, and connect the second power circuit to the power supply in the second position.

A system and method for selecting an algorithm for monitoring alarm conditions based on a detector orientation and position. A method may include determining a position and orientation of a smoke detector, selecting an algorithm for performing detection of an alarm condition, and operating the smoke detector using the selected algorithm.

A system and method for selecting an algorithm for monitoring alarm conditions based on a detector orientation and position. A method may include determining a position and orientation of a smoke detector, selecting an algorithm for performing detection of an alarm condition, and operating the smoke detector using the selected algorithm.

Among other things, techniques are described for preventing and mitigating fire risks on a vehicle. For example, multiple sensor inputs are provided to a predictive model which determines fire scenarios. A first fire risk data and second fire risk data are received from the sensors, and data indicative of fire prevention and fire mitigation is received. At least one fire prevention measure applicable to the first imminent fire risk condition and the second imminent fire risk condition is determined. The first fire risk data and the second fire risk data are compared to the fire mitigation thresholds. At least one fire mitigation measure applicable to the first imminent fire risk condition and the second imminent fire risk condition is determined. The at least one fire prevention measure or the at least one fire mitigation measure is activated.