Electrochemical measuring system with multizone sensors

DETAILED DESCRIPTION In contradistinction, the sensor of the invention is composed of a plurality of active zones, generally all identical, arranged on an insulating substrate in the form of a strip provided with at least two insulated current collectors of electrically conducting materials, it being necessary to detach said active zones one after the other after each use to carry out the subsequent measurement.
A sensor of this type according to the invention differs from previously known "multisensors" and can be designated as being a "sequentially disposable active multizone sensor".
It makes it possible, after having introduced and connected a strip of determined length into a measuring apparatus, to carry out several successive measurements of the same physical chemical characteristic or of the concentration of the same constituent in the sample-solution deposited successively on a new measuring zone of the sensor, the previously used zone having been removed.
BRIEF DESCRIPTION OF THE INVENTION In the sequentially disposable active multizone sensor of the invention, the current collectors are located on the same face of the strip or on the opposing faces, each collector having at least one portion constituting a means of contact with the measuring apparatus and at least one other portion successively traversing at least two active zones, delimited by windows provided in one or several cover strips in which the visible parts of the current collectors constitute the electrodes.
The strip may moreover be provided with positioning and/or sectioning means after use.
The contact zones of the current collectors of conducting material are located either at one extremity of the strip, or along one or two edges of the strip, or distributed between one extremity and the edges of the strip.
The number of measuring zones on one given unit of strip introduced in the measuring apparatus will depend, for a given measuring apparatus, on the one hand on the physical dimension of the active zones and, on the other hand, on the distance therebetween, this distance being imposed, inter alia, by the ease of access to the measuring zone positioned outside the apparatus with a view to the collection of the sample, the characteristics of which are to be measured