The utility model discloses a device for heterogeneous flowmeter is markd, include: the barrel, its inside cavity, the bottom is sealed, and the barrel outer wall is provided with cylindrical protrusion, measuring aperture, its quantity are two, set up the barrel bottom, the measuring aperture distributes about barrel axis plane symmetry for mark the need checking sample volume, sign hole, its quantity are two, set up the barrel top, with the measuring aperture becomes the axis and distributes, solved the venturi cavity in the fluid rinse inconvenient problem, and reduced to treat the calibration sample volume, simple structure, processing, use are simple and convenient.