A signal processor includes a frequency converter of the multiphase type. Such consumer devices can be used not only with the security systems but also for other uses. A steam generating device is disposed in the reservoir, and when in operation, generates steam from the water in the reservoir. The microcontroller monitors the output of the amplifier chain and stores the signal and compares it with previously stored signals. The substrate containing glass forming raw materials may be formed so as to have a Young’s modulus of 110 or higher.