Temperature-sensitive switch (ferrite): It is a characteristic that the saturation magnetic induction intensity of the soft magnetism suddenly changes near the Curie point temperature.When the temperature is higher than the Curie point temperature, the soft magnetism changes from the ferromagnetic state to the paramagnetic state. At this time, it is non-magnetically conductive, and the two permanent magnet rings cannot form a loop with the reed switch reed. At this time, the reed switch is disconnected. When the temperature is lower than the Curie point temperature, the soft magnetism returns to the magnetic conduction state. The magnetic circuit forms a loop, and the reed switch is connected, so that the cycle works repeatedly Magnetic steel temperature limiter (ferrite): the soft and hard magnets are attracted to each other.Under the force of the spring, when the temperature reaches the Curie point temperature, the soft magnetic is not conductive when it changes from the ferromagnetic state to the paramagnetic state Magnetic, separated from the permanent magnet, making the hard magnetic rod move to disconnect the electrical switch