Dekati Oy

Beneq Oy

Pegasor Oy

Liekki Oy

Juha Tikkanen

Jorma Keskinen

Mikko Moisio

Kauko Janka

Markku Rajala

Kimmo Pietarinen

Antti Rostedt

A process for measuring particle concentrations in a gas using an ejector for producing an essentially constant sample flow and for efficient mixing of the particle-containing sample and essentially clean, ionized gas. The invention also relates to an apparatus implementing such process. The process and the apparatus can be utilized for example in measuring particle concentrations in an exhaust system of a combustion engine.

Particle measurement process and apparatus

A method and apparatus for controlling a vapor deposition based coating process, including monitoring ultrafine particles, and adjusting at least one process parameter based on the monitoring. During at least one stage of the coating deposition process, at least one of the coating precursors includes a gas, a vapor, or an aerosol.

Process for controlling coating deposition

A method and a sensor device for determining particle emissions from exhaust gases of a combustion engine substantially during the use in an exhaust pipe system or a corresponding exhaust gas duct, in which method emitted particles contained in the exhaust gases are charged and the particle emissions are determined by measuring the electric charge carried by the emitted particles in the exhaust gas duct. The emitted particles are charged by varying the way of charging or the charging power with respect to time in such a manner that as a result of the charging, emitted particles brought into at least two different electrical charge states are present, wherein the charge of the emitted particles is further determined as a difference value/values measured from the emitted particles brought into said at least two different electrical charge states.

Method and a sensor device for measuring particle emissions from the exhaust gases of a combustion engine

The invention relates to a device () for determining the size distribution of aerosol particles from a flow (), the device () comprising an electric mobility analyzer () and an impactor (), connected to each other in such a way that the nozzle part () of the first stage of the impactor () is simultaneously the bottom plate of said mobility analyzer ().

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Tampere, Finland

Juha Tikkanen