Patent ID: 7280039

Claim:
A fire sensor comprising: a detecting portion for detecting a fire; a status information determining and outputting means for determining and outputting status information corresponding to a status of said detecting portion; a signal transmitting element for transmitting said status information by emitting a pulse externally; and a status information transmitting means for setting a temporal factor of said pulse based on said status information, and making said pulse emit from said signal transmitting element based on said set temporal factor, wherein said status information determining and outputting means is operable to determines whether a sensitivity functioning as said status information lies in a sensitivity tolerance range, and to output a current sensitivity; and said status information transmitting means is operable to determine which grade of sensitivity level said currently sensitivity lies in among sensitivity levels in which said sensitivity tolerance range is divided into a predetermined number of grades, to set a pulse spacing as said temporal factor corresponding to said grade of sensitivity level that said current sensitivity lies in, and to make said signal transmitting element emit two of said pulses within a predetermined timing using said set pulse spacing.