公开(公告)号：US10300484B2

公开(公告)日：2019-05-28

申请号：US15128207

申请日：2015-03-26

申请人： Zhenyu Li ,  Baichen Li

发明人： Zhenyu Li ,  Baichen Li

IPC分类号： B01L3/00 ,  F04B43/04 ,  G05D7/06 ,  G05D16/20 ,  G01N35/00 ,  G01N35/10 ,  G01N15/14

摘要： A handheld system includes a reference pressure source configured to generate a reference pressure. The handheld system also includes a primary pressure source coupled to the reference pressure source. The primary pressure source is configured to generate a primary pressure in a primary pressure range. The primary pressure is less than the reference pressure, and the primary pressure is induced by the reference pressure source. The handheld system also includes a secondary pressure source coupled to the primary pressure source. The secondary pressure source is configured to generate a secondary pressure in a secondary pressure range. The secondary pressure is less than the primary pressure, and the secondary pressure is induced by the primary pressure source.