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Scattering Turbidimeter

A turbidimeter and scattering technology, applied in the field of scattering turbidimeters, can solve the problems of incorrect measurement results of turbidimeters, unavoidable fingerprint optical parts and scattering, etc.

Active Publication Date: 2018-11-20
HACH LANGE HACH LANGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scratches can lead to a strong optical part of the measurement beam passing through the scratch at the bottom entrance window, resulting in a strong secondary signal
[0007] Since the vials are changed manually in the laboratory nephelometer, it cannot be avoided that fingerprints cause optical parts and scatter
Fingerprints can thus generate secondary signals and erroneous nephelometer measurements

Method used

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Examples

Experimental program
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Embodiment Construction

[0031] figure 1 A nephelometer 100 is schematically shown for determining the turbidity in a fluid sample 27 , preferably in a liquid sample 27 . The present nephelometer 100 is a laboratory nephelometer such that the bottle 10 is changed for each turbidity measurement. The nephelometer 100 has a cylindrical nephelometer bottle 10 , a measurement light source 40 and a scattered light detection device 42 . The nephelometer bottle 10 is oriented vertically, but can generally be oriented in other orientations as well. All spatial terms refer to eg figure 1 vertical orientation shown.

[0032] The measurement light source 40 produces a measurement beam 41 which can be a beam of any suitable type of electromagnetic radiation. The measuring beam 41 enters the interior of the bottle axially through the inlet window 16 of the bottle 10 . The measurement beam 41 is scattered by solid particles dispersed in the sample 27 , and the scattered light is detected by a ring-shaped scatte...

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Abstract

The invention relates to a nephelometer (100) having a cylindrical bottle (10) for measuring turbidity in a fluid sample, preferably a liquid sample. The bottle (10) includes a transparent body (12) including a transparent flat bottom inlet window (16) and a transparent barrel (14) with a circular outlet window (20). The bottle (10) has a cylindrical optical shield (30) disposed at the barrel (14) over a portion of the axial length of the barrel (14). A shield (30) is arranged axially adjacent to the uncovered cylindrical portion serving as the exit window (20), the shield (30) optically blocking access from the outside of the bottle (10). An optical shield (30) is disposed axially over the exit window (20) of the barrel (14). The optical shield prevents the measurement light beam from being reflected by the boundary layer of the liquid sample and / or by the bottle cap and does not directly irradiate the scattered light detection device.

Description

technical field [0001] The present invention relates to a laboratory or process nephelometer for measuring the turbidity of a fluid sample, such as drinking water, in a transparent sample bottle. Background technique [0002] Nephelometers determine the concentration of solids or other particles suspended in a fluid, which can typically be a liquid, a gas, or a gas-liquid mixture. US 8724107B2 discloses a nephelometer having a cylindrical nephelometer bottle comprising a transparent flat bottom inlet window through which a measurement beam enters axially inside the bottle. The axially intermediate portion of the bottle barrel defines a transparent outlet window through which light scattered by the suspended solid particles radially exits the bottle interior. The cylindrical exit window is radially surrounded by an annular light collection unit that optically cooperates with a light sensor that detects the scattered and collected light. The primary light signal produced onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/51
CPCG01N21/51G01N2021/513G01N21/0303G01N21/49G01N2201/064G01N2201/068
Inventor 曼弗雷德·巴特费尔德巴斯·德·海伊汉斯-乔基姆·孔普赫安德里亚斯·米特赖特安德里亚斯·格尔利茨
Owner HACH LANGE HACH LANGE