FIRE SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a fire sensor capable of improving thermal response by improving heat transfer coefficient to a heat sensing element. SOLUTION: A protecting cover 4 is formed in a position deflecting from a center position of a bottom plate 4 so that a fin 18 for flow straightening corresponds to a drooping position of a thermistor 6, and six fins 18 for flow straightening are formed radially at equal intervals with an arranging position A of the thermistor 6 as the center. Two pieces of the fins 18 for flow straightening formed with the center position in between on a straight line X linking a peripheral vertical sash bar 5c and the arranging position A of the thermistor 6.