With gasalarm device:a housing (1) for receiving a gas sensor of an alarm, and a control system,the housing (1) comprises a cover (7), which, from the outside to the inside a transparent layer (71), a partially transparent colored layer (73) and a covering mask layer (75) comprises,wherein the covering mask layer (75) recesses (77) having a negative effect of an alarm according to be displayed means (79) form,the alarm a light source (51), which in the housing (1) with respect to the recesses (77) of the mask layer (75) is arranged;and wherein the controller is designed as a function of a signal of the gas sensor of the light source (51) of the alarm for the operation control.
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