公开(公告)号：US3582664A

公开(公告)日：1971-06-01

申请号：US3582664D

申请日：1968-01-15

Applicant: JIRI HRDINA

Inventor： HRDINA JIRI

IPC: G01N21/25 ,  G01J3/34 ,  G01J3/48

CPC classification number: G01N21/255

Abstract: A flow-through cell analyzer using a compensating photoelectric circuit indicating the ratio of light passing through a measuring cell and light impinging on the cell. A source of light projects a beam which is controlled, for example, by different filters and which is split into two equivalent beams going to respective photoelectric cells the outputs of which are compared, one of the cells providing a reference voltage which is kept constant by varying the intensity of the light source or by the use of filters or diaphragms.

公开(公告)号：US3514210A

公开(公告)日：1970-05-26

申请号：US3514210D

申请日：1968-01-15

Applicant: JIRI HRDINA

Inventor： HRDINA JIRI

IPC: G01N21/03

CPC classification number: G01N21/05 ,  G01N2021/054 ,  Y10T436/118339