What is a Thermistor? A thermistor may be a thermally sensitive resistor that exhibits an exact and sure modification in resistance proportional to little changes in body temperature. How much its resistance can modification depends upon its distinctive composition. Thermistors are a part of a bigger cluster of passive components. And unlike their active element counterparts, passive devices are incapable of providing power gain, or amplification to a circuit. Thermistors are made up of metallic oxides, binders and stabilizers, pressed into wafers and then cut to chip size, left in disc form, or made into another shape. The precise quantitative relation of the composite materials governs their resistance/temperature “curve.” Manufacturers typically control this ratio with great accuracy, since it determines how the thermistor will function. Thermistor History Michael Faraday; AN English person, first discovered the concept of thermistors in 1833 while reporting on the semic...