Analytical device for test fluids, comprises a conductive polymer composition

The invention relates to a conductive connection test the liquid and comprises a conductive polymer composition the switch element, a specific claimed is a biological property or the radioactive substance sensor for chemical property, or the sensor is used for providing a polymer composition to the test fluid, wherein the polymer composition includes a polymer and metal, alloy or a return to and metal oxide conducting filler particles; the polymer composition with a first layer of conducting when the static, and stress of the change cover or the compression or electric field affect conversion and second layer of conductivity; the polymer composition at least one of the following: theAt least retains the 90%w/w particles formed on 100 items of; strainersAnd/or an extension is the liquid flow channel penetrable main body; And/or providing the liquid inlet and discharged from dispersing, and/or a mechanical polyethylene to capable of the liquid testing device the polymer work piece is.