ELECTRIC INDUCTION FIRE ANNUNCIATOR Russian patent published in 2012 - IPC G08B17/00 

FIELD: instrument making.

SUBSTANCE: electric induction fire annunciator comprises a metering amplifier, a data processing unit, a supply unit, a high-voltage pulse generator and a metering line, comprising a discharge chamber, an induction electrode, and an aerosol flow exciter, and also comprises a controller of voltage supplied to the high-voltage pulse generator, and a resistive chain made of two serially connected resistors between an internal electrode - a needle of the charging chamber and a common wire, and connected in parallel to the resistor connected with the common wire, a capacitor and a stabilitron.

EFFECT: higher durability and provision of explosion safety of an annunciator due to preservation of permanent parameters of the charge chamber by means of stabilisation of a corona discharge current.