Density meter

Optics: measuring and testing – For light transmission or absorption – Of fluent material

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Details

250573, G01N 2101

Patent

active

042994950

ABSTRACT:
A density meter which is immersed in a liquid to be measured to optically measure the degree of opacity thereof is disclosed. The meter comprises a density measurement system in which the liquid is sucked into a transparent inner cylinder by moving a piston upwardly and the transmittance of the liquid is measured by an optical system provided outside the transparent inner cylinder, and a calibration system in which a calibration liquid flow path is formed. The outlet of the calibration liquid flow path is communicated with the transparent inner cylinder, and the outlet is above a position at which the end of the piston is set during density measurement. In calibration, the piston is raised to a position higher than the position of the outlet to introduce a calibration liquid into the inner cylinder to calibrate the density meter by the optical system.

REFERENCES:
patent: 3319514 (1967-05-01), McAllister et al.
patent: 3731091 (1973-05-01), Rosso et al.
patent: 3734629 (1973-05-01), Griffiths et al.
patent: 3787703 (1974-01-01), Topol

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