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An arrangement for determining the concentration of a substance in a fluid

A technology of fluid and equipment, applied in spectrometry/spectrophotometry/monochromator, radiation pyrometry, using diffraction elements to generate spectra, etc., can solve problems such as lighting

Active Publication Date: 2008-02-20
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bussotti's device also needs to illuminate a separate reference sample

Method used

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  • An arrangement for determining the concentration of a substance in a fluid
  • An arrangement for determining the concentration of a substance in a fluid

Examples

Experimental program
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Embodiment Construction

[0012] Figure 1 is a schematic diagram of a first embodiment of the apparatus (or device) of the present invention for determining the concentration of at least one substance in a fluid.

[0013] In the embodiment of Figure 1, the fluid is a gas mixture comprising three different known gases whose concentrations are to be determined. It should be understood that the invention is not limited to determining the concentration of gases only, but is applicable to any fluid including liquids. It should also be understood that the present invention is in no way limited to determining the concentrations of three known gases, but is capable of determining the concentrations of any number of gases contained in a gas mixture. Naturally, this is also true for the embodiment of the present invention described in conjunction with FIG. 3 .

[0014] In Fig. 1, the fluid, i.e. the gas mixture, is located in a measuring cell (or meter) 1, such as a flow analysis cell (or flow cell), but it sho...

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Abstract

An arrangement for determining concentration of substances in a fluid comprising a light source (2) for generating primary light pulses within a wavelength interval, a light pulse splitter (5) adapted to split up the primary light pulses into a predetermined number of secondary light pulses to be transmitted through the fluid, the secondary light pulses being separated in time as well as wavelength to be differently absorbed upon passage of the fluid depending on the concentration of the substances, a detector (13) for detecting intensity of the differently absorbed secondary light pulses, and a comparator (14) for comparing the intensities of the differently absorbed secondary light pulses with different reference intensities corresponding to different substances to thereby determine the concentration of the substances in the fluid.

Description

technical field [0001] The present invention relates to an apparatus (or arrangement or means) for determining the concentration of at least one substance in a fluid. Background technique [0002] It is necessary in many situations to be able to determine and monitor the concentration of a substance in a fluid, for example one such situation is anesthesia where five different anesthetic gases are administered to the patient's respiratory circulatory system in different compounds and mixtures. In that case, it is extremely important to keep the concentration of the various gases, ie the dose, under strict control. [0003] French patent document FR2677120 (Bussotti) discloses a device for measuring photometric spectroscopy in which measurements are performed on a remote sample by using an optical fiber. According to the Bussotti device, the light from the lamp passes through a light chopper consisting of a motor-driven turntable with a plurality of slits that control the ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01J3/18G01N21/31G01J3/10G01NG01N21/35
CPCG01N21/314G01J3/10G01N21/3504
Inventor G·帕姆斯科格
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD