Abstract: The present invention relates to an unrecoverable line-type temperature sensitive detector having short-circuit fault alarm function, comprises a detecting cable comprising at least two detecting conductors disposed in parallel and a fusible insulation layer, a resistor, and a resistance signal measuring device, wherein the detecting cable further comprises a semiconductor layer, and wherein the semiconductor layer and the fusible insulation layer are disposed between the detecting conductors so as to space the detecting conductors apart. The detector of the present invention may distinguish short-circuit fault from short circuit caused by fire, and thus overcome the disadvantage of not distinguishing short-circuit fault from short-circuit due to fire in the conventional detector. Therefore, the problem of lack of short-circuit fault alarm function in the prior art is resolved. Accordingly, the present invention improves the reliability of unrecoverable line-type temperature sensitive detector.

Abstract: The present invention relates to an analog line-type temperature sensitive detection cable including two detection conductors arranged in parallel. A NTC characteristic obstructive layer and a fusible insulation layer are provided between the two detection conductors arranged in parallel, characterized in that a intermittent conductive layer is provided between the NTC characteristic obstructive layer and the fusible insulation layer along longitudinal direction of the fire detection cable, wherein at least one of the two detection conductors is an elastic conductor. The invention overcomes the defects of the inaccurate alarm temperature caused by insufficient conductiveness of the two detection conductors while the analog line-type temperature sensitive detector having a fusible insulation layer in the prior art is heated.