Asymmetric ratio sensors of nonelectric quantities

A novel asymmetric ratio resistance method for the measuring of nonelectric quantity changes, e.g. temperature differences, is introduced. On the basis of that method the combined temperature sensor has been developed with high accuracy (relative error /spl les//spl plusmn/0.1%) and sensitivity adjustable to the desired value (C/sub r/= -500 ppm//spl deg/C). This principle is applicable in thermal biosensors as well as in microelectrochemical sensors and also in various physical microsensors.