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The device gives out an electrical control signal when a gamma radiation flux with a gamma quantum energy of 1.25 MeV (200 FJ) is detected Parameters of the electrical control signal: - pulse duration of 0.1 – 0.6 sec.; - the amplitude of the pulse is equal to the value of the voltage of the on-board network. The time of setting the operating mode after the supply voltage is provided, is not more than 1 min The time of continuous operation of the alarm is at least 48 hours The signaling device is powered from the on-board DC voltage network. The power consumed by the alarm does not exceed 10 watts The alarm is resistant to impact of:  - high ambient temperature (+55°C) - low ambient temperature (-50°C) The alarm remains operational after exposure to:  - high ambient temperature (+70°C) - low ambient temperature (-65°C) The alarm is resistant to high humidity with a relative humidity of 100 % at a temperature of +35°C