TEMPERATURE SENSOR

摘要

A sensor for detecting a change in temperature comprises an element at least part of which expands in response to a change in temperature causing a change primarily in the surface electrical resistance of the element. In a preferred embodiment a component of the element expands and/or forms in response to the change in temperature, bursting through the surface of the element to form a conductive network or bridge on the surface of the element. Preferably, the surface electrical resistance decreases in response to a temperature increase. The expanded component that has burst through the surface of the element may form a conductive bridge after the temperature change between first and second conductive members that are wrapped around the element.