The utility model belongs to the field of fire extinguishing tools. The tester comprises a sleeve (1), a smoke bomb box (5), an electric furnace wire (2), an electric furnace wire plug (4) and an air blower (3), wherein the tester is an L-shaped hollow cylinder; a relatively long end is designed to be the telescopic sleeve (1), and the air blower (3) is arranged at a relatively short end; the electric furnace wire (2) is arranged at the corner in the hollow cylinder and is powered through the electric furnace wire plug (4); the smoke bomb box (5) is arranged in the hollow cylinder. The tester disclosed by the utility model is high in testing accuracy, simple to operate, convenient to move, convenient and rapid, high in efficiency, and labor-saving and time-saving.