SUCTION DETECTOR WITH FLOW SENSOR

PROBLEM TO BE SOLVED: To forcibly let the ambient air flow into a sensor room preceding a suction detector with a smoke sensor and a gas sensor as the ambient state sensors, connecting a control circuit to the smoke and gas sensors and making the control circuit function as a programmable processor. SOLUTION: A detector 16i has a housing 30 which contains a smoke sensor 32a and a gas sensor 32b as the ambient state sensors. The outputs obtained from both sensors 32a and 32b are connected to a control circuit 34. The circuit 34 is mounted by means of a programmed processor 34a. Then the program and the command given to the processor 34a are read and stored in a ROM 34b or a ROM 34c that can be electrically erased. Thus, it is possible to mount an aspirator 36b which is suitable to flow the ambient air into a sensing area 32c.