公开(公告)号：US10677717B2

公开(公告)日：2020-06-09

申请号：US15605255

申请日：2017-05-25

Applicant: Rosemount Inc.

Inventor： Hoang M. Nguyen ,  Jeffrey L. Lomibao ,  Chang-Dong Feng

IPC: G01N21/25 ,  G01N21/78 ,  G01N21/77

Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The measurement cell has an illumination source and an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to determine an absorbance of a reducing reagent and store the determined reagent absorbance in the analyzer. The controller is configured to use the determined reagent absorbance to compensate at least one subsequent colorimetric sample measurement.

公开(公告)号：US10222322B2

公开(公告)日：2019-03-05

申请号：US15617438

申请日：2017-06-08

Applicant: Rosemount Inc.

Inventor： Calin I. Ciobanu ,  Hoang M. Nguyen ,  Jung S. Hwang ,  Jeffrey L. Lomibao ,  Behzad Rezvani

IPC: G01N21/31 ,  G01N21/25

Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The colorimetric analyzer has an illumination source configured to emit illumination at a first wavelength during a first absorbance measurement and at a second wavelength during a second absorbance measurement. The colorimetric analyzer also includes an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to detect an obstruction of light between the illumination source and the illumination detector based on the first and the second absorbance measurements.

公开(公告)号：US20180356335A1

公开(公告)日：2018-12-13

申请号：US15617438

申请日：2017-06-08

Applicant: Rosemount Inc.

Inventor： Calin I. Ciobanu ,  Hoang M. Nguyen ,  Jung S. Hwang ,  Jeffrey L. Lomibao ,  Behzad Rezvani

IPC: G01N21/25 ,  G01N21/31

CPC classification number: G01N21/251 ,  G01N21/255 ,  G01N21/31 ,  G01N2201/127

Abstract: A colorimetric analyzer includes a reaction chamber configured to receive a sample and at least one reagent. A measurement cell is operably coupled to the reaction chamber. The colorimetric analyzer has an illumination source configured to emit illumination at a first wavelength during a first absorbance measurement and at a second wavelength during a second absorbance measurement. The colorimetric analyzer also includes an illumination detector spaced from the illumination source such that illumination from the illumination source passes through the measurement cell to the illumination detector. A controller is coupled to the illumination source and the illumination detector. The controller is configured to detect an obstruction of light between the illumination source and the illumination detector based on the first and the second absorbance measurements.