PURPOSE: To improve the dispensing accuracy by providing a separator comprising an upper chamber connected to a lower chamber having a discharge port and a suction pipe and a carriage pipe, and a measurement part to be opened to the lower chamber by a controllable closing member in a suction conveyor device in which dissimilar material in bulk is weighted, and dispensed to a plurality of places.

CONSTITUTION: A lower chamber 416 having a discharge port 411 and an upper chamber which is connected to a carriage pipe 61 and connected to a suction pipe through a shut-off valve 71 are provided in a separator 41. A measurement container 414 is connected to a lower part of the upper chamber 415 through a conical transfer part 417. A disk covering member 419 is provided on a lower outlet 418 of the measurement container 414 so as to be communicated therewith. The covering member 419 is closed when a demand indicator 413 is responded, while it is opened when a target value oscillator to be operated by a transducer 425 is responded by a pneumatic turning device 420.