Abstract: The invention relates to a method and a device for the metered release of irritants by means of a propellant and/or solvent gas in anti-people defense rooms. The invention describes a method and a device for a metering controller for releasing irritants by means of a propellant and/or solvent gas in anti-people defense rooms while complying with health limits. After a first dose (TE), subsequent dosages (TN) are carried out in time intervals, so that both a hazardous limit of a concentration of the irritants in the room (1) is not exceeded and that also a sufficiently effective concentration is always met, and the concentration-lowering losses (SF, SV) arising from the agent, system and environment are compensated for. The concentration losses are detected metrologically and/or as parameter-dependent variables (SF, Sv) and made available as a program solution of the control device (7).