The Tyco MR301 516.021.002 is an optical smoke detector. The Tyco MR301 is designed to detect visible smoke that is produced by materials which smoulder or burn slowly. The MR301 is used in general applications and in areas where cable overheating may occur, such as electical service areas.
The design of the asymmetrical sampling chamber and signal processing techniques stop unwanted alarms that are cause by very small insects. Smoke that enters the sampling chamber scatters the infra-red light pulses onto a photodiode.