A life safety device includes a housing and a light transmission device disposed within the housing. A first end of the light transmission device is visible at the exterior of the housing. The life safety device additionally includes a transmitter for generating a light. The transmitter is positioned within the housing adjacent the light transmission device. A receiver measures ambient light around the life safety device. The receiver is positioned within the housing adjacent the light transmission device.

A life safety device includes a housing and a light transmission device disposed within the housing. A first end of the light transmission device is visible at the exterior of the housing. The life safety device additionally includes a transmitter for generating a light. The transmitter is positioned within the housing adjacent the light transmission device. A receiver measures ambient light around the life safety device. The receiver is positioned within the housing adjacent the light transmission device.

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 chamberless smoke detector includes at least one light emitter and at least one light receiver and a transparent sheet above the at least one light emitter and the at least one light receiver.

A chamberless smoke detector includes at least one light emitter and at least one light receiver and a transparent sheet above the at least one light emitter and the at least one light receiver.

A disclosure and claims to systems and methods for allowing rapid detection and display of an emergency condition using a plurality of specially-constructed multifunction sensors and display units, which allow building evacuation plans to be evaluated, modified, and transmitted to building occupants.

A disclosure and claims to systems and methods for allowing rapid detection and display of an emergency condition using a plurality of specially-constructed multifunction sensors and display units, which allow building evacuation plans to be evaluated, modified, and transmitted to building occupants.

Abeam detector apparatus (1) comprising: beam emitter apparatus (2); reflector apparatus (3), locatable across a volume to be monitored; and beam receiver apparatus (4). The beam emitter apparatus (2) is capable of creating a first linearly polarised beam of light of first linear polarisation and directing said first linearly polarised beam of light towards the reflector apparatus. The reflector apparatus (3) is capable of either: receiving the first linearly polarised beam of light and modifying such light into a beam having circular polarisation, elliptical polarisation or being unpolarised, and reflecting said circularly polarised, elliptically polarised or unpolarised beam of light towards the beam receiver apparatus; OR receiving the first linearly polarised beam of light and reflecting such light towards the beam receiver, and modifying such light into a beam having circular polarisation, elliptical polarisation or being unpolarised. The beam receiver apparatus (4) is capable of receiving said circularly polarised, elliptically polarised or unpolarised light and creating therefrom a second linearly polarised beam of light, in which the first and second linearly polarised beams of light have different polarisation.

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.