Disclosed is a smoke detector comprising: a housing including a base, the base including a planar surface configured for being positioned against and attached to a ceiling, a printed circuit board (PCB) comprising a substantially planar shape with a front surface and an opposing back surface spaced in a thickness direction T, and a plurality of perimeter edges including a bottom edge and an opposing top edge spaced in a height-wise direction H, a first side edge and an opposing second side edge spaced in a transverse direction, wherein the top edge comprises a first projection extending in the height-wise direction away from the top edge, the first projection including a first temperature sensor height-wise spaced from the top edge, and the PCB is mounted to the housing so that the front surface of the PCB is perpendicular to the planar surface of the base.

The aspects disclosed herein are directed to systems, methods, implementations, and devices for evaluating the efficacy of optical fire placement(s) with a plume-based model. Employing the aspects disclosed herein, an implementer may review a real-world implementation and determine if said real-world implementation is covered adequately by a proposed optical fire placement strategy.

The aspects disclosed herein are directed to systems, methods, implementations, and devices for evaluating the efficacy of optical fire placement(s) with a plume-based model. Employing the aspects disclosed herein, an implementer may review a real-world implementation and determine if said real-world implementation is covered adequately by a proposed optical fire placement strategy.

The present invention relates to a smart gas monitoring system configured at a confined space. The smart gas monitoring system measures concentration of hazardous gases at regular intervals and generates an alarm if concentration of a gas increases beyond a pre-defined value. The smart gas monitoring system also generates an alert to a number of laborers on their electronic devices, along with measuring their health conditions.

The present invention relates to a smart gas monitoring system configured at a confined space. The smart gas monitoring system measures concentration of hazardous gases at regular intervals and generates an alarm if concentration of a gas increases beyond a pre-defined value. The smart gas monitoring system also generates an alert to a number of laborers on their electronic devices, along with measuring their health conditions.

A gas detection device has at least one functional device (1, 13), which is configured to receive radiation (10) passing through a defined monitoring area (4). At least one analysis unit (9, 19) is configured to detect and analyze a change in the received radiation (10). The received radiation (10) is based on the interaction of the radiation (10) with a gas present within the monitoring area (4). At least one camera (8) has a field of view (11) that at least partially detects the monitoring area (4).

A gas detection device has at least one functional device (1, 13), which is configured to receive radiation (10) passing through a defined monitoring area (4). At least one analysis unit (9, 19) is configured to detect and analyze a change in the received radiation (10). The received radiation (10) is based on the interaction of the radiation (10) with a gas present within the monitoring area (4). At least one camera (8) has a field of view (11) that at least partially detects the monitoring area (4).

A smoke detector comprising an enclosure communicating with an external environment, within the enclosure a light source illuminating a detection volume in a first wavelength band and a light-sensor responding to light from the sensing volume in a second wavelength band. The detector is configured to sense photo-luminescent fire products, particularly polyaromatic compounds, and actuate an alarm when signal levels indicate a dangerous/fire condition is present. The photo-luminescence detector may be combined with optical scatter or other fire detectors to improve discrimination between fires and false alarm sources.

A smoke detector comprising an enclosure communicating with an external environment, within the enclosure a light source illuminating a detection volume in a first wavelength band and a light-sensor responding to light from the sensing volume in a second wavelength band. The detector is configured to sense photo-luminescent fire products, particularly polyaromatic compounds, and actuate an alarm when signal levels indicate a dangerous/fire condition is present. The photo-luminescence detector may be combined with optical scatter or other fire detectors to improve discrimination between fires and false alarm sources.

An optical detector device may receive a spectroscopic measurement from a multispectral sensor. The optical detector device may determine, based on the spectroscopic measurement, a particulate size of a particulate. The optical detector device may determine, based on the spectroscopic measurement, an identification of the particulate. The optical detector device may determine, based on the particulate size and the identification of the particulate, that an alert condition is satisfied. The optical detector device may trigger an alert based on determining that the alert condition is satisfied.