Standard Sound Fire Alarm OPAZ for Effective Fire Safety Alerts

The siren OPZ Standard is used as a warning and cautionary means of sound signalling in various systems. The main controlling element of the electrical circuit is a microprocessor, which, measuring the supply voltage of the siren, forms the most optimal sequence of pulses to pump power into the resonant circuit of the sound membrane. Such optimisation allows to maintain the same sound pressure level in a wide range of supply voltages (from 6 to 30 V), while the current consumption decreases with increasing supply voltage. The sound signal generated by the siren is tone-modulated with frequency deviation in the range from 2.5 to 3.5 kHz.