Overheat detecting sensor for use in e.g. train compartment, has wire made of material with positive or negative temperature coefficient which extends on sheath and is separated from sheath by insulating material

摘要

The sensor has a core (1) conductor extending at interior of a conductive sheath (2). The core and sheath are separated by a material with positive or negative temperature coefficient. The sensor has a wire (4) made of a material with positive or negative temperature coefficient extending on the sheath and separated from the sheath by an insulating material. The core, sheath and the wire are linked by a connection unit.