公开(公告)号：EP3365658A1

公开(公告)日：2018-08-29

申请号：EP16787521.0

申请日：2016-10-18

申请人： Parker Hannifin Manufacturing Limited

发明人： FOORD, Anthony Peter ,  LUNT, Stuart Lucas

IPC分类号： G01N21/03 ,  G01N21/15 ,  G01N21/85

CPC分类号： G01N21/0303 ,  G01N21/15 ,  G01N21/8507 ,  G01N2021/0307

摘要： A sample testing apparatus is disclosed for use in optical transmission analysis of fluid samples such as oils or engine oils. The apparatus comprises a transmission cell comprising first and second fixed walls (1,2) and a movable window (3) that is moved with respect to the first and second walls in and out of a test region (6), defining an optical path through a fluid sample with a portion extending through the or each gap (L1,L2) between the walls (1,2) and at least a portion of the movable window (3). The window may be stepped or continuously varying in thickness for linear movement. There may be more than one window mounted on a carrier of differing thicknesses, including rotational movement such as using as an impeller.