Constant temperature detector
The fixed temperature detector is a fire detector that activates an alarm when the temperature rise caused by a fire exceeds a certain value within a specified time. It has two types of structure: line type and point type. The line type is that when the local ambient temperature rises to a specified value, the fusible insulation melts and short-circuits the two wires, thereby generating a fire alarm signal. Point-type fixed temperature detectors use bimetal, fusible metals, thermocouples, thermo-sensitive semiconductor resistors and other components to generate a fire alarm signal at a specified temperature value.