Ventilation rate standard rod and test head device

The utility model provides a ventilation rate standard rod and a test head device, comprising a rod body and a plurality of capillary through holes integrally formed in the rod body, the plurality of capillary through holes are parallel to each other, each capillary through hole is parallel to the axis of the rod body, the periphery of the plugging end of the rod body is provided with ventilation holes communicated with the capillary through holes, and the ventilation holes are communicated with the capillary through holes. The end face of the inserting end of the rod body is provided with a chamfer structure, the other end of the rod body is provided with a chamfer structure or a right-angle structure, the R value of the chamfer structure is preferably between R0.1 mm and R2mm, the outer surface of the rod body is provided with an airtight layer, and the distribution length of the airtight layer covers the distribution area of the ventilation holes. The ventilation rate standard rod is higher in structural s