초록 ▼

The invention relates to a method and a microsensor for measurement of transport coefficients like diffusivity or flow velocity. The microsensor has a reservoir provided with a mouth and a transducer. The transducer has a tip placed in the mouth, which can be provided with a membrane or insert. The

The invention relates to a method and a microsensor for measurement of transport coefficients like diffusivity or flow velocity. The microsensor has a reservoir provided with a mouth and a transducer. The transducer has a tip placed in the mouth, which can be provided with a membrane or insert. The reservoir contains one or more gases or one or more liquid-dissolved substances intended for the diffusion through the mouth into an area or field of a medium outside the mouth of the reservoir. The transducer measures the partial pressure of the gas or the concentration of the liquid-dissolved substance in the mouth, whereby transport coefficients of diffusivity or flow velocity are determined. Preferably, the gradient of the partial pressure or the concentration is determined.

대표청구항 ▼

[ What is claimed is:] [1.]1. Method for the measurement of kinetic transport coefficients such as diffusivity or flow velocity in a medium formed by a gas, a liquid or a matrix, comprising the steps of providing a tracer in a gaseous, liquid or liquid dissolved form, locating the tracer in a reserv

[ What is claimed is:] [1.]1. Method for the measurement of kinetic transport coefficients such as diffusivity or flow velocity in a medium formed by a gas, a liquid or a matrix, comprising the steps of providing a tracer in a gaseous, liquid or liquid dissolved form, locating the tracer in a reservoir, providing a measuring device to measure the tracer as the tracer is emitted from the reservoir into the medium, and measuring the concentration or the partial pressure of the tracer in a passage or transport area having a form of a channel having a mouth and which channel connects the reservoir and the medium, whereby the measurement is carried out on the tracer in the passage or transport area.