Dekati Oy

Annele Virtanen

Jorma Keskinen

Mikko Moisio

Marko Marjamäki

Jyrki Ristimäki

A method and a device for measuring density properies of a particle distribution, in which method a first parameter relating to the particle distribution is measured at a first measuring point (), at least part of the flow that passed through the first measuring point is guided to the second measuring point (), a second parameter relating to the particle distribution is measured at a second measuring point (), and said first and second parameters relating to the particle distribution are used to determine at least one density property of the particle distribution of the original flow ().

Method of measuring density properties of a particle distribution

A method and a device for measuring properties of a particle distribution, in which a parameter relating to the mobility of the particles is measured at one measuring point () and a parameter relating to the aerodynamic size of the particles is measured at a second measuring point (). By means of the measured parameters, at least one property of the particle distribution of the original flow is determined ().

Method for measuring properties of a particle distribution

The subject of the invention is a method for minimizing Coulombic losses in impactors and an impactor, in which Coulombic losses have been minimized. The method according to the invention is based on restricting the force effect of the charges accumulated in impactor's insulators on the charged particles. This restriction of the force effect can be realized, for example, by placing an electrically conductive surface between the insulator and the flow, or by forming an insulator so that the force effect is minimized.

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Varalankatu, Finland

Annele Virtanen