Patent ID: 6597276
Filing Date: 2003-07-22
Classification: G01K,H01C

Abstract:
A sensor assembly comprising(A) a laminar sensor for detecting changes on a laminar substrate, the sensor having a resistance at 20Â° C. RT and comprising (1) a laminar sheet which (a) has a first surface and a second opposite surface, and (b) comprises a conductive polymer composition which (i) exhibits temperature dependent resistance behavior and (ii) has a switching temperature TS, (2) a plurality of sensing elements (a) each of which comprises an electrode pair, said electrode pair comprising a first electrode and a second electrode, said electrodes being separated from each other and positioned in contact with and attached to a surface of the laminar sheet, and (b) which are electrically connected in a resistive network, at least some of said sensing elements connected in series, and (3) two electrical leads for connecting the sensing elements into a circuit; and (B) a laminar substrate which is a laminar battery element, the sensor being positioned directly in contact with and covering at least 75% of one surface of the substrate.