Apparatus for detecting substances in fluids comprises capacitor with pyroelectric layer between two electrodes, layer on upper electrode absorbing substance, producing change in temperature in pyroelectric layer

摘要

Apparatus for detecting substances in a fluid (6) comprises a pyrosensor containing a capacitor with a pyroelectric layer (31) between two electrodes. A surface layer (38) on the upper electrode absorbs the substance from the fluid, producing a change in temperature in the pyroelectric layer and a signal from the capacitor. The pyroelectric layer has a thickness 0. 1 - 20 microns. An independent claim is included for a method for detecting substances in a fluid using the apparatus.