| 摘要 |
The proposed heat fire detector contains a glass sealed tubular casing, which is partially filled with liquid, and a fiber-optic lightguide. The fire detector is distinctive by that, for the purpose to enhance the reliability and simplify the design of the fire detector, the walls of the casing have identical thickness, the casing is filled with liquid with high thermal expansion coefficient, and the fiber-optic lightguide is bent at acute angle in a point located over the surface of the liquid.
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