3 Review(s)

Fire Alarm is a fully assembled fire detector & alarm working science model. This model is designed on Yellow paper with neat labeling. This model includes a fire sensor called as Thermistor, which is connected to a Transistor. When temperature rises, the fire sensor allows current to flow through the base of Transistor which turns on the buzzer. At higher temperatures, i.e., under fire conditions, buzzer will start alarming and under normal conditions, the alarm remains switched off. This model is an excellent teaching kit on basics of electronics and sparks student's interest in various applications of electronics in human life.